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Tecumseh Snow King HMSK80 wont stop running full throttle


Rachet's Avatar
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02-13-08, 08:18 AM   #1  
Tecumseh Snow King HMSK80 wont stop running full throttle

I took one pass this morning, down my 100 foot driveway and my engine started to stall then it went full throttle and the speed control lever does nothing until you reach the off position.

The engine is running much faster than when it is set at the normal full throttle position.

Nothing obvious is present, like a detached spring.

Any help would be greatly appreciated

 
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Legal v8's Avatar
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02-13-08, 10:13 AM   #2  
Did you check to make sure there isnt a load of ice in the carburetor/governor? Ice would be my first thought. How old is this machine?

 
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02-13-08, 10:23 AM   #3  
um

throttle might be stuck open because of ice. governer linkage issues. maybe?

 
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02-13-08, 11:41 AM   #4  
Tecumseh Snow King HMSK80 wont stop running full throttle

Snow and Ice is not the problem.

I took another look

The linkage that goes from the govenor to the carburetor
doesn't seem to be doing anything to the carb when it moves.

 
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02-13-08, 05:28 PM   #5  
Sounds like one of two things may have happened, The throttle shaft butterfly screws backed out causing the butterfly to stay open, Or the governor slung apart inside the engine.

 
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02-13-08, 07:12 PM   #6  
It really sounds like the governor gear assembly came apart in your engine. It has been known to happen with these horizontal crankshaft engines. Replace about a dozen a year with the flyweights scattered inside the engine.

 
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02-14-08, 05:47 AM   #7  
yeah

im going to have to agree. does everything look intact? is the linkage together? it could be that the cord that is engaging the engine is getting stuck so that when you try to disengage it wont slide back.

 
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02-14-08, 07:49 AM   #8  
HMSK80 speed problem

I always use the electric start to get the machine going so I'm sure the rope isn't the problem.

Is it a big job to fix the govenor if it is within the engine?

Does it normally entail new parts or just a reconnection of existing parts.

Small engine repair is not my thing but I know the turn around from my dealer will be 10 to 14 days. I live on the
Ma. / NH border and I'd like to minimize the time I'm without a snowblower since we are getting more snow than normal this year. I'm handy but a novice with engines, is this something an inexperienced person can do?

 
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02-14-08, 06:55 PM   #9  
You can download a service manual here; http://toprake.com/index.php?module=..._Document_id=2

Right click "Download" then "Save File As".....Take a look at the manual and see if it's something you want to try and tackle, You will need a new governor/side cover gasket and I would replace the cover crank seal as well.

Check your carb first before doing this....

Good Luck

 
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