repaired engine won't idle down.

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  #1  
Old 07-20-14, 04:37 PM
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repaired engine won't idle down.

I have a B&S V twin 19 hp model 4077770124e1 that I just finished replacing a head and the gov gear. Engine started and runs fine but will not idle down. In fact it seems to be running to fast. the only way to idle it down is using the throttle lever at the carb. I have tried adjusting the gov and the throttle linkage.
I checked the gov springs and all looks OK. Could I have mis assembled the the gov gear in some way. It seems pretty straight forward.

Thanks for any help you can give me.

Dennis
 
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  #2  
Old 07-20-14, 09:14 PM
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If you can slow it down at the linkage, then either it isn't adjusted right or the governor internally isn't correct.
 
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Old 07-21-14, 07:39 AM
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I'm going to check the linkage again, but if I need to remove the sump again what should I look for? Everything moved freely and it seemed as if there was only one way for it to go back together.
 
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Old 07-21-14, 10:44 AM
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I'm not sure what to look for other than if it isn't open the engine, then double check to be sure it is all there and functional. The flyweights, hat, gear, the lever isn't broken or bent, etc...

Why did you replace the governor and head to start with?
 
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Old 07-21-14, 03:39 PM
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This mower was given to our RC flying club. It was running very poorly. Trouble shooting showed an exhaust valve guide that had moved bending the pushrod which then fell into the engine and took out the governor gear.
I have taken the sump back off and found the gov gear torn up again. I am assuming that is from improper gov adjustment the first time which led to an over speed on start-up.
 
  #6  
Old 07-21-14, 11:47 PM
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Make sure that the governor gear is not riding crooked on the shaft... it could have bent the shaft out of proper alignment when the pushrod hit it.
 
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