Question about Poulan "Poulan" Push Mower

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Mower shakes I changed the blade on my mower because I hit something and messed up the old blade. Now the mower shakes real bad.

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Sounds like you bent the crank - remove the spark plug , tie the shut off handle closed with a rope , then raise mower up so you can spin the blade . look at the blade bolt while you spin blade . if crank is bent the bolt will seem to wobble

Posted on Oct 17, 2008

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with it off look under at blade probably bent and hitting frame replace blade if necessary

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I would check the blade for balance and straightness. Also check if it has a piece out of it. The deck looks ok? No dents and is not damaged. Deck sits level? Front to back and side to side? Make sure all the bolts holding the spindle are tight. If the mower was set up by a dealer, make a good trip around the mower,look for anything that looks out of place.

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Are we talking ignition timeing or valve timeing? if it is kicking back on the starter rope it has probably sheared the flywheel key ( has the mower blade hit somthing in the lawn ) also iof the blade bplt is loose this will also cause it to kick back.

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My helper was mowing with my Honda push mower.. The handle started shaking.. a lot.. It will start up at first pull but is not cutting well. The blade is turning but the mower is vibrating so much it...


it sounds like the blade may have hit some thing hard .
You say the blade is turning is it turning level or is it sort of swaying as you may have ofset the drive pin.
Worst case.. new mower as it can cost a lot of money to repair drive
I know as i have done the same thing a few years ago

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This mower sounds like it took a hit at one time and perhaps bent the blade, shaft?
If you had to replace the blade because it in fact did hit something then you would also want to be sure the sheer pin is ok, that is an easy test.... it goes like this, does it pull smooth when you are trying to start or does it backfire, shake, run raggy and at times want to pull your arms out of their sockets from the kick back?
Before checking the sheer pin you must determine if the shaft is bent(the shaft supports the balde) Raise mower off the ground, pull the spark plug out of the cylinder and turn the shaft, does the blade hit the casing underneath, if it does you are either buying a new mower or paying a lot to repair this one.
Also if any or all these situational events happened to the mower it is safe to say that the shaft oil seal is leaking on the bottom of the mower, remove plug and remove blade, inspect seal just above where the blade sits, its a round pressed rubber lipped seal around the shaft.
If it does all that then you need to pull the top cover and pull cord plate off the mower, take off the 3/4" nut left loosens, and check the sheer pin, its in the 1/4 wide x1/2 " long groove going down the shaft just below where you removed the 3/4 " nut, if its worn or partially worn pull the aluminum looking round cover off using a soft tap with a hammer to remove or a wheel puller and take the old sheer pin to Ace or the like hardware to match up a new one, install using the reverse proceedure, tighten the 3/4" nut to about 50 ft. pounds. Happy Mowing!!

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My wife was mowing the lawn and she hit a rock. Since than the lawn mower does not start and when it tries to start a little smoke will come out of the carburator area. The mower is a Sears eager 1...


Unless the blade is belt-driven, like on riding mowers, then the blade is attached directly to the engine crankshaft. Hitting a rock with a mower like this is a very common problem. You probably have a bent crankshaft. In most cases this can be repaired, but may not be worth it, considering the age of the mower. But you should call a local small engine/mower repair shop to ask for an estimate. The repair is not something you would be able to do yourself.

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1 Answer

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Sounds like your deck may be bent in and the blade is hitting. Remove the sparkplug and tilt the mower back on the handle (I'm assuming this is a push mower) and have someone pull the rope while you watch the blade underneath. You should see the problem.

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you may have trash in the gas tank. empty it nad wash it out real good make sure the gas you use is fresh the vibration could be the blade ; or it could be that when the rock was hit it bent the shaft and that would cause vibration also. remove the spark plug and rotate the blade with your hand, you should be able to tell ifi the shaft is bent or not if not try putting a new blade on

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