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SnapperLawn Mower 8 hp Tecumseh engine runs only on high speed.

The governor does not increase engine speed when it has a load put on it and the engine stalls. This all started after the engine shut down and I could not start it. I then tried to re-set the speed and idle like I have on a Biggis & Stratton engine.

I still could not start it and took ff the air cleaner off and found that the throttle cable had broken and replaced that. The engine has never run right since. My attempts at adjusting the engine have failed.

Help!

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Hi

first check the governor linkage.The link with the governor sistem from crankcase is the lever(arm) with some holes.To encrease the sensitivity, raise the spring into the next higher hole in the arm.To descrease the sensitivity,hook the spring into a hole lower than its original position.If you need more info just tell me.
regards savumihai71

Posted on Dec 05, 2008

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Hello:

The Carbuertor Throttle is Held in the Full Open Position Until the Engine is Started and Running, then the Governor and Spring Work together to Keep the Engine RPMs to the Desired Setting.
The Following is an Explaination on How the Governor System on Small Engines Function.
>>The Governor System behaves like an Unending Tug of War between One of Two Governor Springs, which Pull the Throttle Toward the Open Position, and a Spinning Crankshaft, which Tries to Close the Throttle. When the Load on the Engine Increases - a Typical Example is when you Move your Running Lawn Mower from the Driveway to the Grass - Crankshaft Revolutions Drop. But the Governor Spring is Still Tugging, Causing the Throttle Plate to Open. In Response, a Larger Volume of Air-Fuel Mixture Enters the Carburetor, Increasing Engine Speed to Compensate for the Increased Load. The Crankshaft Speeds Up, and the Tug of War Resumes, until a New Equilibrium is Achieved. With Each Change in Load, the Tension Between the Governor Spring and the Load Brings about a New Equilibrium, known as the Engine's Governed Speed. Neither Side Wins until the Engine is Shut Off. At that Point, without the Crankshaft Spinning, the Governor Spring Pulls the Throttle to the Wide-Open Position. Two Types of Governors are Common on Small Engines - Mechanical and Pneumatic.
Please, Do Not Hesitate, If you Hit a Snag or this Does Not Correct the Problem, I am Here if You Require More Assistance.
Hope this Helps. Let me Know What Happens, Please. May the All Mighty Bless You and Yours. Be Safe and Be Happy. Thanks.

Good Luck

Respectfully

jbridger (John)

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