snowblower carburetor adjustments

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  #1  
Old 01-05-03, 03:57 PM
raycook3
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Angry snowblower carburetor adjustments

Hello All:
i have a craftsman 8hp tecumseh snow king. it was running rough , so i decided to play with it a little i took off the carburetor bowl and cleaned the screw and hole and bowl. then reassembled and adjusted the other screws. now i cant get it running very good at all. when i shut it down the carb backfires. i need to know the adjustment settings (eg--11/2 turn out from snug) for the bowl screw --the side idle screw--and there is a screw above the idle screw(some kind of govener i think). can someone please tell me how to set all of these adjustment screws.

snowing in canada ya know..........
thank-you
 
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  #2  
Old 01-05-03, 07:22 PM
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Hello and Welcome Ray Cook3 to the Do-It-Yourself Web Site and our Small Engine forum.

Start with the basic adjustments. Low {L} speed screw out 1 1/2 turns and High {H} speed screw out 2 turns from the seated position. These settings should get the engine running.

The bowl screw must be tightened in fully to create a good seal to the gasket and prevent fuel leaks.

Once the engine is running, set the idle speed using the throttle adjustment scew. Adjust the Low {L} speed screw until the engine runs well. Without black smoke coming from the exhaust or stalling. The mid point between the two settings is correct.

Adjust the High {H} speed screw so the engines runs well at high speed. Same setting as Low {L} speed. No smoke and no stalling, stumbling or bogging during accelerating or under a load.

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  #3  
Old 01-15-03, 09:52 AM
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Location: Rochester, NY
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The only thing I'd add to Tom's post is to adjust the engine's high-speed setting under load. I suggest half-turn increments, usually toward richer, when the unit is being governed under heavy load. Without this final adjustment, it may not achieve highest power under load.
 
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