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Discussion Starter #1
The Guess What Happened Game:

Cutting the lawn and everything is normal. Suddenly the RPM's begin to rise (I'm already at WOT) and when I cut the throttle to idle the RPM 's continue to rise. I throttle down using the choke and come to a rest under a tree (because I know I'm gonna have to fix this).

Guess what happened.
 

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Diesels are awesome!
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Booooom!
 

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Make Better Mowers
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The weight fell off the governer inside the engine.
 

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Discussion Starter #7
All good guesses, but no. Start thinking abstractly.
 

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The carburetor broke in half?
 

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not quins. but sextuplets
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u hit the switch that switched the gas tank over to the MOONSHINE tank
 

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Runaway propeller.
 

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It was able to draw air somewhere head gasket?? Intake gasket ??? Although the moonshine theory sounds good to me ... Only thing is my shine tank is always empty;(


Sent from the MTF Free App
 

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The turbo's wastegate stuck closed causing a horrific engine explosion!
 

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A mouse got sucked into the AF causing a lean mix?:sidelaugh
 

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Ran out of gas
 

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Discussion Starter #18
I too suspected that the problem was the governor. So I removed the air cleaner and began cleaning the linkage with carb spray. Sure enough, the linkage movement was restricted. After playing with it for a few minutes I realized that the linkage movement was restricted on the carb side. Not what I suspected.

So I decided to remove the carb. I removed the two bolts to remove the air cleaner plate. Wait...two bolts....there's supposed to be three bolts. Where did the third bolt go?

I took a look inside the carb but didn't see it...at first. Then I moved the linkage arm while looking at the throttle plate and that's where I found the missing bolt...under the throttle plate. It was wedged in there pretty good. I got it out with a magnetic screw chaser.

I'm glad (lucky) that it didn't find it's way past the manifold and into a intake valve.

Thanks for playing. Hopefully we wont have to play this game for a long time.
 

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Perhaps a twig jammed the throttle?????
 

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That could have been nasty. Mangled valve, maybe a hole in a piston, scarring, ouch. Good thing you caught it!
 
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