After hitting a tree stump. The engine shut off. I tried several times trying to restart the engine. Intermittently, the engine recoil and yank backward. Does anyone has the fix? I know Mr. KnowItAll post the correct problem but he did not mention how to fix it. Can anyone help. Thanks, cutteo
2007-11-01 11:46:41 · 3 answers · asked by cutteo67 1 in Home & Garden ➔ Maintenance & Repairs
If you are sure that you didn't bend the crankshaft the problem is most likely the key between the crankshaft and the flywheel. Remove the spark plug wire and spark plug. With the mower tipped up, airfilter up, watch the crankshaft/blade as you slowly turn the engine. Check to see that it turns true and doesn't wobble side to side. If it is ok check the key. You will have to remove the engine cowling to get to the flywheel. Remove the nut from the crankshaft on top of the flywheel. Now you should be able to locate the keyway. If the keyway in the flywheel is not aligned with the keyway in the crankshaft you will have to pull the flywheel and replace the key. The reason it is yanking back is because the timing is off. The key in the flywheel is there to protect the crankshaft durning sudden stops. It releases the energy in the flywheel instead of imparting it through the crankshaft.
2007-11-01 13:18:34 · answer #1 · answered by renpen 7 · 2⤊ 0⤋
you probably broke your shear key which holds the fly wheel to the crank shaft if you are not mechanically inclined this can be a rather frustrating job. my recommendation is to take it to your local small engine shop and let them do it because if you attempt to disassemble the covers housing air cleaner fan shroud etc. loose nuts bolts etc you will only compound your problem. have them also check the crankshaft to see if it is bent also the blade and the blade adapter if all is OK you are ahead of the game the shear key is designed to do exactly what it did break to prevent sever motor damage from a sudden stop.
2007-11-01 14:07:22 · answer #2 · answered by mc52132000 2 · 0⤊ 0⤋
hitting that stump has bent your crankshaft inside the motor
the only way to fix it is to take it apart and install and new crank shaft
if you have the tools and the time it is only about a four hour job to do yourself
if you dont have to time or tools to do that you will have to take to a shop and have them do it
it is cheaper to buy a new remanufactured mower
2007-11-01 12:12:36 · answer #3 · answered by Imagine 3 · 0⤊ 2⤋