Left blade seems to be left hand thred
SOURCE: Problem mowing my lawn.
I had the same problem and I already found those recommended solutions\ causes on the web:
1. The
motor isn't on full throttle.
2. The blade is upside down.
3. The grass is
too high when cutting it.
4. Overlap your cuts.
It helped my problem/ I hope it will help yours too!
SOURCE: Mower shakes
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
SOURCE: john deere model 14sb lawn mower repair
Check for bad bearing in clutch immediately, Remove belt, try and turn the clutch pulley if it is hard to turn or feels rough, replace the bearing in the clutch. If you do not replace bearing immediately you will be buying a $300.00 clutch very soon. I know from experience. You possibly have been hearing a loud unusual roar from engine area for awhile and wondered where it was coming from. As these bearing will usually squall a cry for awhile before they die.
SOURCE: Mower hit a big rock and stoped running
If you hit something hard enough to partially shear the key on the blade adapter, you did shear the key on the flywheel, and it will need to be replaced for the engine to run properly.
SOURCE: Can a mulching blade work in a non-mulching mower?
True Mulching mowers have a specific deck design to them, but I would say yes to your question.It's been quite a few years, but I have done this little conversion myself - replace regular blade with a mulching blade. Just make sure the mulch blade does fit your mower. Also, use something substantial in terms of strength to close the discharge opening. There can be a good deal of force placed at the opening from flying debris. You'll also want to make the cover removable, so you can mow damp grass without the cover.
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