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How To Remove A Sheared Flywheel Key

How To Remove A Sheared Flywheel Key

Engine & Repair Troubleshooting +-Air Filter; Battery; Cam Shaft; Carburetor;. Reassemble. Abby's Guide > Outdoor Power Equipment (Lawn Mowers, Snow Blowers, Chain Saws and more) > Discussions > Sheared a second flywheel key on my Tecumseh HS50 Outdoor Power Equipment (Lawn Mowers, Snow Blowers, Chain Saws and more) Discussions. A drive unit for a press uses an oil shear brake unit and an oil shear clutch unit. But instead, I used a prybar to gently nudge the flywheel loose. Before you replace the key and install the flywheel, you will need to file down any high spots on the crank shaft from the flywheel shifting/spinning. This flywheel key keeps the engine flywheel of your outdoor power equipment connected to the crankshaft. Generally, the half-moon-shaped flywheel key can be sheared when the crankshaft is stopped abruptly. The interference of the bevel is what holds it in place. The flywheel key has sheared and moved around by 30ish degrees. I have replaced it and the engine runs great for a week or so. Video showing a sheared flywheel key. You may want to make sure the crankshaft is not bent while you have it down to this point. The control key, of course, can be used to remove the plug to service the lock. Genuine Briggs & Stratton flywheel keys used on most engines. If these two conditions are not perfect, it's not a very good method. General internet wisdom points to sheared flywheel key. How do you remove the sheared woodruff key in the crankshaft without causing damage My woodruff key sheared and I - Honda 1995 Accord question Search Fixya Press enter to search. Release the locking mechanism, and repeat as needed. Make sure you adjust them the same time you replace key (and before attempting to start the engine). haha sorry about this. If it's never happened in 17 years, it's not as unusual as you might think. Remove the access cap for the flywheel nut and see if the nut is loose. Park it on a flat level surface, and remove the spark plug wire from the end of the spark plug to prevent accidental engine starting. Note: there is a small hole on the shaft that allows for oil flow to the crankshaft - using the correct flywheel puller will protect this hole. When the key was even slightly sheared it would not start. Discard flywheel key. These often cause the engine to refuse to run but are easily replaced when you learn how to remove them. Don't hurt to recheck. Do not run a mower without its blade. The taper is what holds the flywheel to the crank, if damaged it will move and shear the key. I sheared the key to the flywheel key on my Stihl MS290. Then while starting (hot or cold) I hear a "kluck" and the flywheel seems to jam and shears another key. The flywheel key should not be shearing if the flywheel nut is torqued down correctly. Basically, if the key sticks up into the slot on the flywheel then the flywheel didn't rotate and lop its head off. For removing flywheels on Micro engine. Pull the stator cover and check the flywheel nut, if it is loose or fell off, remove the flywheel (see Q#48) and see if the key is intact. Now is where i get confused, when i pulled the blower off & removed the bolt, the key appears to be in place & maybe intact. How to Remove (pull) a flywheel on a Briggs and Stratton Engine (any small engine) #19 Tecumseh LV195EA - Flywheel and Ignition installation Flywheel Key Keeps Getting Sheared - My mistake!. Make sure you use factory keys, they are soft so they break instead of the $$$ flywheel. the question is why the key is being sheared. Removing broken bolts and studs is never a fun job and can take more time than you think. Generally speaking the flywheel has a taper fit to the crank. The next day I received my Amazon order. If it does, there are mechanical issues that need to be remedied. I don't know how, I was certain It was lined up properly I have a spare, but am baffled as far as How I should go about removing the damaged one. how to remove a briggs & stratton lawnmower flywheel. 1 Coefficient of Fluctuation of Speed Cs. I have a puller I made from a flat piece of steel for when the engine is in the chassis but I still need to remove some stuff. frustrating and can take a lot of force to remove , why they do this i dont know , ive had a few cagiva mitos shred the woodruff key area and shear the woodruff key itself causing bad running through ignition timing moving , maybe this is why they load them up with loctite , i dont just fit a new wood ruff key if needed and torque nut to. Once the main (Flywheel) shear bolt is replaced turn the flywheel backward by hand. You either twist off a nut, break or round off a screw, or strip out the threads entirely. Then the flywheel has to be removed. Remove the bar and chain from the saw. If that can't happen, turn the mower on its side to make sure that there is no grass or sticks or other debris caught in the blade. Properly torqued bolts are close to their yield point and shear much more easily than dowels in single shear (assuming the same material and size) because of that. Kohler Engines and Parts Store : Flywheel Keys - Misc Engines & Parts Shipping Option Tecumseh Engine Parts Denso Spark Plugs Oregon Equipment Parts AYP / Electrolux Zama Carburetors & Parts Walbro Carburetors & Parts Kawasaki Engine Parts Kohler Engines / Parts Tillotson Carburetors & Parts Stens Equipment Parts Warner Electric PTO Clutches Ogura Electric PTO Clutches Oregon Chainsaw. That is usually the cause of "pulling back" on the starter rope. If it spun loose, check for damage on the tapered end of the crankshaft and the inside of the flywheel. 5 it will run but only at one speed, if you try to throttle it up or down it dies it is also hard to spin over could this be a sheared flywheel key. I then saw the problem, the key in the crankshaft that slides through the flywheel had sheared off. Craftsman Mower Flywheel Key: Intact The mower tried to eat a protruding root, emitted a horrible crash , and ran poorly until I shut it off, after which it refused to restart. The flywheel key should not be shearing if the flywheel nut is torqued down correctly. Kickstart issue and flywheel not turning. Reading the service manual doesn't make it clear that this could be a problem as they start the assembly at TDC. My brothers solution is to cut the shield to gain access the area to remove the starter. I have a puller I made from a flat piece of steel for when the engine is in the chassis but I still need to remove some stuff. Modern punch and shear machines have hydraulic prime movers. I went back to the dealer for a new flywheel key and a correct new spark plug. The flywheel key you are refering to I assume is called a shear pin. I recently acquired a motor that I found had a sheared flywheel key. The woodruff key is there for timing purposes. Remove the pull cord housing, you will see it from there. 1 Coefficient of Fluctuation of Speed Cs. 1 spark plug wire and a tachometer to No. Found the flywheel key was sheared. If a lawnmower starter rope pulls part way, then jerks back hard, a sheared flywheel key is the most likely cause. <>Here's a Robin key that was broken when the mower hit a stump. The flywheel opening has a little channel where that key slides thru thus aligning the flywheel in the correct position. be sure to replace with same type key as a harder one will only cause you to bend the crank when you hit something with blade next time. Set the flywheel key, flywheel nut and flywheel in a safe place until you replace them later. 7, Position 3 screwdrivers thru the holes in the flywheel (FW) and gears to lock slipper clutch. Replace with new flywheel. ; Chassefiere, E. For smaller rivets, use a drill bit to drive through the surface. Or is it a problem? Is it designed as a safety feature to prevent damage to rotating parts, engineered this way? How about it you real 'wrenches', what can you tell us? What do the manufacturers say?. what's a good technique for removing the key from the crank once it's sheared ? This one is flush, and can't seem to get it out of there. Home Forums Home > Bikes > Trials > Dismiss Notice. It could be stressful to the flywheel key, but they are not so easy to shear. To protect more expensive components from damage, the flywheel key is designed to shear if the mower blade hits an object like a rock or a tree stump hard enough to make the flywheel slip out of alignment with the crankshaft. _____ 2007 Outlaw IRS "Outlaws are the Chuck Norris of the quad world. Replace a broken or sheared flywheel key using a manufacturer-approved replacement part. Took the advice of the above, and used a puller to remove it, and yup, the key had sheared off. If a flywheel key is sheared off due to the engine being forced to stop suddenly, your engine will not be able to restart. Adventure Rider. Otherwise you may collapse the lugs, and won't be able to re-install the screws. The frictional force of the two tapers should be sufficient, with the key only in place to control spark timing. If that can't happen, turn the mower on its side to make sure that there is no grass or sticks or other debris caught in the blade. The flywheel key should not be shearing if the flywheel nut is torqued down correctly. Start engine and run at 6000 rpm. Then dry the plug with a paper towel and try starting it again. the easiest way I've found to remove the flywheel is to first spay the shaft with a nut loosener,if you don't have this you can also use a small amount of oil. It is a fairly easy replacement. If it does not align, the timing has slipped. Last edited by matty_x on Sat Aug 23, 2008 4:53 pm; edited 2 times in total. Step 4: Remove the flywheel key. I figured a sheared key, Took all the stuff off the top of the engine and sure enough, it sheared, but broke a big chunk out of the flywheel. The woodruff / flywheel key is likely partially sheared. Eddy mixing coefficient upper limit derived from the photochemical balance of O2. They are used to stop the engine from being in time, if something on the end of the output shaft binds up. Doing so will shear the flywheel key and damage other components such as clutches and crankshafts. The backstory : I bought a toasted 038 Super and converted it to a Magnum. Flywheel nut was "finally" tightened using the Ty Racing Flywheel holder and tightened to the spec to using torque wrench. Inspect for sheared or partially sheared key, replace as. When you remove the flywheel nut, the flywheel should come off. after his flywheel sheared the key several times it might of messed up the taper of the shafts, not allowing it to seat properly on the crank. In that case, screw the nut loosely back onto the crankshaft, wedge a screwdriver under the flywheel and give the shaft a sharp tap with a hammer. Just a little help from friend to help guide drive shaft out not to damage fins on coolers and hyd. The old one looked solid and the sheared surface is smooth. I have not been present when the keys sheared , but have been assured that no unusual objects were struck while tilling. I took the flywheel off and the Woodruff key is sheared smooth with the crank. I've never had to mess with removing the flywheel nor fixing a sheared key, but I think that is what I am looking at. rzvmad: My push mower has the same symptoms of a sheared flywheel key. Make sure you use factory keys, they are soft so they break instead of the $$$ flywheel. Thread: Pexto Shear. Carefully inspect governor gear shaft and replace it Remove Oil Pan Assembly only if it is damaged. Very common. ) Take a 19mm socket and turn the motor over until you the key slot is at your 12 o’clock. It then starts to run rough and the exhaust got louder. The actuation of the brake unit and the clutch unit occurs simultaneously due to a common activation member. So, it never fails! Just when you think you have got the whole job taken apart and everything is under control. If the thread on the crankshaft is rusty, you need to wet it with Penetrene for a couple of hours first. Don't forget for the valve stem cap button if the engine dropped or broke a push rod. Now, if the key is sheared, the flywheel could still grip the crank enough so that it's tight even though the timing would be way off though. What caused the bolt to shear off? discussion in bottom of the key, So bolt had to snap before the clutch could fall off. Good to go. Craftsman push lawnmower wobble after hitting rocks won t start symptoms of a sheared flywheel key on lawnmower you common walk behind lawn mower problems vibrates too much symptom how to fix a lawn mower that won t start dengarden craftsman push lawnmower wobble after hitting rocks won t start what to do when your lawnmower has a bent crankshaft. Otherwise you may collapse the lugs, and won't be able to re-install the screws. Don’t use a screwdriver or cold chisel as it is very important that the woodruff keyways are clear, burr free and undamaged. The interference of the bevel is what holds it in place. I kept starting it, starts right up, but ran rough. _____ 2007 Outlaw IRS "Outlaws are the Chuck Norris of the quad world. haha sorry about this. How to replace a flywheel;1. Woodruff key looked good from inspection before removing the flywheel. 1993-01-01. A clutch connects the flywheel to the crankshaft, which in turn drives the tool. Don't forget for the valve stem cap button if the engine dropped or broke a push rod. sheared flywheel key on honda push mower? I have an 11 year old Honda push mower; it is an HRX217TDA (self-propelled double blade mulcher). Click here for Part 4 - Suspension, Steering and Brakes. Also, when you put the flywheel back on torque the nut to around 60 ft lbs or you will shear the key when the engine tries to start. When I got home ( after rowing a mile against wind), I pulled the flywheel to check points, etc. How to Replace a Sheared Briggs & Stratton Flywheel Key Easy Method To Remove A Lawn Mower Flywheel w/NO Special Tools HOW TO DIAGNOSE AND REPAIR A BROKEN FLYWHEEL KEY. When I ground the flywheel we cleaned and scraped the mounting ring to make sure there were no imperfections and it would lay flat on the grinder flange. The flywheel is wedged and bolted onto the top of the engine's crankshaft and needs a few special. Remove the gas cap, and cover the gas filler hole with a piece of plastic sheeting. The engine is a polaris and it is very similar to the setup of older skis. sheared flywheel key/ grounde/bad coil/ shorted stop switch--any of the above which one of the following is not a type of manual starter on a small gas engine- rope-wind, clutch and ratchet, rope-rewind, or wind-up. Best wishes,. reassembled everything. Remove the flywheel screen cap. The following is a list of steps in checking the key: a. The flywheel key should not be shearing if the flywheel nut is torqued down correctly. There is a TDC mark on the flywheel, there is a little plug to remove on the top of the bellhousing where you can see it. Because it starts right up and runs, your flywheel key is not sheared. If you replace the key make sure to install the flywheel correctly (see Q#48). The flywheel key on a Husqvarna chainsaw connects the flywheel to the crankshaft. Run engine out of gas if possible. The flywheel key aligns the flywheel with the crankshaft. You must verify that the flywheel key has not been sheared off. The flywheel key might have sheared in half. I have had it together but when I try to start it it breaks the woodruff key in the crank. well guess what, if you do not torque the flywheel nut properly, even though it seems tight, the key will shear as soon as you try. How to Replace a Sheared Briggs & Stratton Flywheel Key Easy Method To Remove A Lawn Mower Flywheel w/NO Special Tools HOW TO DIAGNOSE AND REPAIR A BROKEN FLYWHEEL KEY. Take the red side cover off and see if you can easily turn the flywheel by hand. Pull off the top cover, remove the flywheel nut and you will be able to see if the flywheel and crankshaft slots are lined up. In the case of a molded key in the flywheel, it is not necessary to throw away an otherwise perfect flywheel just because the key has sheared off. and shear is large enough, two operators may work together, using two pedals without interference. be sure to replace with same type key as a harder one will only cause you to bend the crank when you hit something with blade next time. what causes a flywheel key to shear?? I haver to admit that this is not a ski it is an atv but i cannot find any atv forums with people who know anything about the mechanical workings of a 2 stroke. Once assembled take the nut off and give a moderate/mild rap with a brass hammer to the crankshaft with pressure on the flywheel if it comes right off, it's not holding good. I have a Husqvarna yth2348. If you keep shearing flywheel keys, it's usually because the flywheel nut is not torqued down to the right specs (125HP = 90 ft lbs), or the slot in the flywheel or crank shaft snout is damaged. Half was in the flywheel slot, the other half in the crankshaft which was a quarter turn away. I think once you seal up the weak point, it just finds the next one. Answer by cgrid76hotmailcom (545) first off is the rewinder well the pull start thingy on the front. I have not been present when the keys sheared , but have been assured that no unusual objects were struck while tilling. insert vitos key with offset towards front tires. Remove the bar and chain from the saw. Modern punch and shear machines have hydraulic prime movers. Recent recovery of surface wind speed after decadal decrease: a focus on South Korea. repalces OEM flywheel key. Let us know what you find before doing anything else. Twist in a counterclockwise motion, 1/4 turn at a time, to back it out. said by Hall : If the crankshaft is bent, what. This engine is about five years old. TOPIC CATEGORIES. Step 1 Removing Stripped Counter-Sunk Allen-Key Bolts Cut a slot into the screw head. Then found that I had damaged one of the coils with the screwdriver previously. Verify proper air gap between ignition module and flywheel. remove engine and disassemble and inspect everything. I have a single sylinder b&s 18. If a flywheel key is sheared off due to the engine being forced to stop suddenly, your engine will not be able to restart. Now take the same socket and your impact wrench and remove the flywheel nut. HI, I took off my flywheel and sure enough the key was sheared. could it be a bent crank shank i need help it is about 1978 ace hardware brand tiller ray May 2007. Kickstart issue and flywheel not turning. Make sure to route all your wires AWAY from the outside of the plate! Getting your wires chewed up by the flywheel is not cool. Best Answer: to check the key you will have to remove the top cover from motor. Sheared a second flywheel key on my Tecumseh HS50 Original Message Jan 25, 2006 3:28 pm I'm continuing my quest in a new thread now that I have a more specific question. php on line 143 Deprecated: Function create_function() is deprecated. Engine & Repair Troubleshooting +-Air Filter; Battery; Cam Shaft; Carburetor;. Re: Sheared A Flywheel Key Tryce gives good advice. Page 1 of 2 - Sheared key & slipped flywheel (probably) - posted in Massey, Snapper, AMF Tractor Forum: Was snowblowing weekend before last (MF1650 with Kohler M16 engine that had been put in by a PO), just finishing the driveway when the blower belt slipped off the pulley & jammed. Need to remove flywheel on a 19. How to remove outboard motor flywheel without a puller. The flywheel is bolted onto the top of crankshaft and held at the correct position via the flywheel key. The interference of the bevel is what holds it in place. If it was hard to crank over before, the valves may need to be adjusted. If the bolt wasnt tight or the flywheel not set, then the key which is aluminum will either shear or fall out of the keyway altogether. After I was able to start engine for testing, after running engine about 2 minutes I turned off engine, but after I could not start it back. You may want to make sure the crankshaft is not bent while you have it down to this point. If your starter motor is just whirring and clicking away, but not actually starting your truck, you have a problem. Corresponding camshaft lobe(s) should also be checked for wear or damage. I grabbed a gear puller from my tool cart and removed the flywheel. How do you remove the sheared woodruff key in the crankshaft without causing damage My woodruff key sheared and I - Honda 1995 Accord question Search Fixya Press enter to search. Check it for binding. You have to remove the flywheel to replace the key and this can be done with a cheap three armed puller from Autozone. The special flywheel key fits into the slot on the crankshaft and aligns with the keyway in the center of the flywheel. sheared flywheel key on honda push mower? I have an 11 year old Honda push mower; it is an HRX217TDA (self-propelled double blade mulcher). I've never had to mess with removing the flywheel nor fixing a sheared key, but I think that is what I am looking at. The flywheel nut is torqued to around 50 ft lbs. They flywheel will not spin on the crankshaft if the key is sheared because it is still on tight with the nut. It's entirely plausible that scratch markings you see on the shaft or wherever are from someone else shearing a key or other shenanigans over the last 30 years. Because Woodruff keys have round bottoms the act of sliding the flywheel onto the shaft can cause the key to rotate down in front and up on the back side. If the flywheel doesn't break loose on its own, tap the top of the flywheel with a mallet to break it free. If you hear a rattling noise while removing the cover, you may have some extra shear/cotter pins stored inside the cover! Just pop off the top lid to access them (fig. Important kinetic energy. In this video i show how to pull a flywheel on a small engine, then my puller broke while trying to show. I then have to reach behind me and spin the flywheel back in the opposite direction about a half turn. I worked at a rental store that rented lawn mowers and I would have to replace a flywheel key about once a month. Searspartsdirect. You will have to remove the engine cowling to get to the flywheel. A spark means the coil and such are working and it's not grounded somewhere. The Fast Flux Test Facility (FFTF) is the most re. A clutch connects the flywheel to the crankshaft, which in turn drives the tool. If a lawnmower starter rope pulls part way, then jerks back hard, a sheared flywheel key is the most likely cause. Next time used a strap wrench and locktite. This is a relatively minor repair, but it should be done by a professional. I have in the past taken a very large screw driver and wedge between motor and fly wheel and hit top of fly wheel and will drive off. Video of the Day. Or is it a problem? Is it designed as a safety feature to prevent damage to rotating parts, engineered this way? How about it you real 'wrenches', what can you tell us? What do the manufacturers say?. Because Woodruff keys have round bottoms the act of sliding the flywheel onto the shaft can cause the key to rotate down in front and up on the back side. There is a tool for pulling the flywheel called, wait for it, a flywheel puller. Time to pull the flywheel and get a new flywheel key! Pulled the flywheel and found existing key was sheared in half. Having filed keys, sheared keys, lapped flywheels to cranks, etc myself, I'd say that you're both right. Remove 3 screws holding gas tank and pivoted the gas tank back and out of the way. ocscootercustoms needs to identify and correct the problem preventing the proper mating of the crank and flywheel. Pull the flywheel off and look at the. sheared flywheel key/ grounde/bad coil/ shorted stop switch--any of the above which one of the following is not a type of manual starter on a small gas engine- rope-wind, clutch and ratchet, rope-rewind, or wind-up. I am thinking that the magnetic ring that spins on the crankshaft (dependant on the flywheel key) was not spinning, therefore not triggering the voltage to cycle, which hopefully is the cause of my no-spark. I bought the HF puller and had to thread the screw holes. If it does, there are mechanical issues that need to be remedied. If you don't torque it, the first time the engine fires it will shear the key again. There are several techniques that may be employed to accomplish removal. It could be stressful to the flywheel key, but they are not so easy to shear. HI, I took off my flywheel and sure enough the key was sheared. I am trying to fix a B/S 130202 3273 01 engine mounted on a Craftsman Rototiller 917 299 850. If you pull on the recoil starter and feel no resistance from the engine, the flywheel key may well be sheared and will need to be replaced. "HELP" woodruff key sheared Crankshaft flywheel nut not tight enough or a poor fit between crank and flywheel will have caused the key to shear. You need to clean both areas with carb or brake clean, wipe both area dry, reassemble and torque to spec. Everything looks good. After I was able to start engine for testing, after running engine about 2 minutes I turned off engine, but after I could not start it back. The would have put the ignition timing out (the valve timing is fixed). When a lawn mower kicks back and rips the cord out of you hands it is usually a sheared flywheel key. So I posted a bit ago about a strange noise from my starter. Manuals can be found at the manufacturers website. Lastly, if you feel absolutely positive your lawnmower is getting fuel and spark and you have tried all of the above suggestions you may need to check the flywheel key on the crankshaft hasn't sheared and thrown off the timing. keep shearing flywheel key???? I had my junk starter stuff replaced and got a dyna ignition and open air filter put by my dealer. It's an easy fix and if your careful you don't have to even use a flywheel puller or knocker. There is a tool for pulling the flywheel called, wait for it, a flywheel puller. 1 Notations 2. Click here for part 2 - flywheel, gearbox & clutch. Re: Sheared A Flywheel Key Tryce gives good advice. If the thread on the crankshaft is rusty, you need to wet it with Penetrene for a couple of hours first. Hopefully it is just a key and not a key that is cast into the flywheel itself. I worked at a rental store that rented lawn mowers and I would have to replace a flywheel key about once a month. If you run over a rock, hard branch or other object with your lawn mower and the mower doesn't crank no matter how many times you try, don't panic. Kinetic energy equations for the average-passage equation system. July 1 2016 Title 40 Protection of Environment Parts 1000 to 1059 Revised as of July 1, 2016 Containing a codification of documents of general applicability and future effect As of July 1, 2016. If that has happened you have to remove the flywheel and fit a new key. It has now sheared 3 flywheel keys while engaged in normal tilling. If you removed the drain plug, reinstall and tighten. How to Replace a Sheared Briggs & Stratton Flywheel Key Easy Method To Remove A Lawn Mower Flywheel w/NO Special Tools HOW TO DIAGNOSE AND REPAIR A BROKEN FLYWHEEL KEY. It seems to till about 15 minutes before failing. But instead, I used a prybar to gently nudge the flywheel loose. The engine is a polaris and it is very similar to the setup of older skis. OPTIMIZATION DESIGN AND ANALYSIS OF A FLYWHEEL A Project for MIE 605 by Jie Wan Submitted to Professor Ian Grosse December 22, 1996. General internet wisdom points to sheared flywheel key. Remove the access cap for the flywheel nut and see if the nut is loose. The piston will not be at the correct position, and the engine will not start. I am thinking that the magnetic ring that spins on the crankshaft (dependant on the flywheel key) was not spinning, therefore not triggering the voltage to cycle, which hopefully is the cause of my no-spark. depending on age of mower a new one might be the best answer. I am trying to fix a B/S 130202 3273 01 engine mounted on a Craftsman Rototiller 917 299 850. I can't imagine that rust would have this good of a hold. Takes a $15 puller to break the flywheel loose, the keys are sold in three packs. The friction between the crank/flywheel is what holds them in place, and the key is a sacrificial part to protect the crankshaft from getting twisted in case of a sudden 'catastrophic' engine. Always check for damage by removing the flywheel to inspect the key and the keyway, the key's slot on the crankshaft. Replaced the key, reinstalled the flywheel, checked TDC (correct!), reattached the fuel line, put it into the water and pulled. Removing broken bolts and studs is never a fun job and can take more time than you think. My old 24T has a shear pin on the flywheel. This step-by-step lawn mower repair guide explains how to replace the flywheel key on a lawn mower with an overhead valve (OHV) engine. The invention relates to a method for manufacturing a flywheel for energy storage, specifically a method for finely balancing the flywheel during manufacture, the method being especially useful in conjunction with flywheels having a composite construction, and the method also being suitable for simultaneously proving the structural integrity of the flywheel. Hope this helps. A sheared flywheel key is caused by hitting something. The other 2 timing marks should be level and visible with the plain of the bottom of the cam cover. Damage can occur to the flywheel key if you hit a rock or other hard surface while cutting; it can also wear down over time. To check, remove the nut and washer that holds the flywheel tight. Since you've already sheared 2 keys and the flywheel has spun a bit on the shaft, I suspect the taper integrity has been compromised. Corresponding camshaft lobe(s) should also be checked for wear or damage. Replaces Briggs & Stratton service part 222698S. 4) Thoroughly clean off crankshaft and flywheel tapers using an appropriate petroleum-free solvent. I've already stripped the flywheel center threads and drilled and tapped it for a three bolt puller. I have lawn mower Craftsman model # 917. If your engine is equipped with a flywheel clutch, remove it while holding the flywheel with a flywheel holder or a flywheel strap wrench. Here are some repair tips to save you time and money. Woodruff key looked good from inspection before removing the flywheel. 3) Remove flywheel using the appropriate puller. Remove the spark plug5. If you use an impact wrench and remove the flywheel nut, it can be obvious if the slot in the crankshaft and the matching slot in the flywheel do not line up exactly. For convenience I asked them to do a spring tune up, check up and lube everything as well, as the crash had precluded me from doing it myself. While running it doesn’t give me any trouble and doesn’t seem to be missing or overheating. I am having problem to fix it. Back home I carefully tapped out the broken flywheel key. After I was able to start engine for testing, after running engine about 2 minutes I turned off engine, but after I could not start it back. Take the spark plug out, take off the top of the engine. ** When removing a flywheel from a Kohler V-twin engine, Kohler recommends using a s. Click here for part 2 - flywheel, gearbox & clutch. To remove these you drive them out through the holes on the back of the flywheel. There are plenty of saws being operated daily that don't even have a key installed. A strong spark is not an indication the key is not sheared. Flywheel key is sheared. I have a Craftsman 21 hp lawn tractor with a Briggs and Stratton engine. Then while starting (hot or cold) I hear a "kluck" and the flywheel seems to jam and shears another key. Pull off the top cover, remove the flywheel nut and you will be able to see if the flywheel and crankshaft slots are lined up. Could I have been so unlucky that I got a bad new key or is a second broken key a sign on some other problem? If I remove the spark plug and turn the flywheel, it seems to run. How to remove outboard motor flywheel without a puller. Note that at the throttle rod and ground wire for run/stop switch fit inside engine cover as reassembling.
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