Yes, there's a good chance you damaged the engine. You could start it
without the blade, but it may not run normally. May vibrate more and
the governor may not keep it stable. I'd put another blade on it.
Likely you've at least sheared a key in the flywheel. If so, it won't
start or will start but run badly. Good news, its a cheap part and not
hard to replace. Pull the metal starter/fan shroud off the top of the
mower and then pull the flywheel. Remove bent key, put in new key.
Worst case, I had a neighbor who hit one of those metal, twist-in dog
stakes with his mower. It caused the lower crank bearing to leak oil
badly. Bent the crank, cracked the block or something. Then its time
for a new mower or motor.
Good luck. Ben......
Ben Zwissler
bjzwissler@gmail.com
Columbus, IN
1966 Triumph TR4A
1973 MG Midget
1980 Triumph TR8
2007 Mazda RX8
2002 Yamaha FZ1
2003 Honda ST1300
On 7/16/2010 5:57 PM, Wayne wrote:
> Hi Guys,
> I have a simple MTD push lawn mower (that I use to mow around my shop)
> with a B&S engine and 22" blade. Today I nailed a small tree stump
> with it. Usually you just "graze" things and it somehow survives when
> you lift off it. Not this time. The engine stopped instantly. The
> tip of the blade, about 3" back, is bent 90 degrees downward!
>
> Is there any chance I damaged the engine? Is it ok to start it with
> the blade off, just to see if it runs ok? (don't know if it depends
> on the blade as a flywheel, or needs it as a load.)
>
> -Thanks, Wayne
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