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Tecumseh engine #143.985510 - carb linkage hook-up

I have a '98 craftsman push push mower that had a gummed-up & leaking carb, #640026. Fixed that with a new kit and cleaned out the tiny holes in the main jet. Now I've forgoten how the "fixed throttle" linkage goes back. There are two links coming from the govenor, a solid link to the carb throttle and a spring link to the solid mounted tab bolted to the intake. When I hook it up that way, the spring link pulls the govenor forward which holds the throttle wide open. Is this right? Do I have the solid throttle link in the correct hole on the throttle body? Thanks for any help.

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  • jby151 May 17, 2009

    What an answer. Not only did it solve the problem, but explained it in detail as well. Thanks again.


  • Anonymous Mar 24, 2014

    No movement from the right side

  • Anonymous Mar 29, 2014

    I have a Craftsman lawnmower with a 143.944500 4 cycle engine.The throttle does not idle. The throttle link (funny bent wire)is connected to the throttle and it is possible to change the speed of the engine by moving the wire forward or back. However, the front end of the wire is not connected to anything and will not stay in one spot. What is missing? Or what am I missing? I have the owners manual but it does not show this wire connected to anything.(part 34336) it is called a throttle link. I don't know what it links to. Please help. Alice



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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


jbridger (John)

Posted on May 13, 2009

  • 2 more comments 
  • John C Bridgers Sr May 18, 2009

    Hello Again:

    You are Very Welcome.

    >>Till Next Time. May All Your Mechanical Problems be SMALL ONES and as Always, May the All Mighty Bless You and Yours. Be Safe and Happy.

    Best Wishes and Good Luck


    jbridger (John)

  • Bob Beard
    Bob Beard Jul 28, 2012

    Thank's a lot Mr. John,I now fully understand how the throttle and governor linkage works.I believe i have installed everything correctly but the engine still will not run properly when engaging the blades.I have tried everything i can't afford to bring it to the lawnmower shop.The only thing i'm not sure of is the throttle cable position. Most of the problem i'm having is keeping the throttle wide open.I have to hold it wide open to get it to run right.Thank's again and God bless you!!!!

  • Bob Beard
    Bob Beard Jul 28, 2012

    Here is my email address if anyone could help with this problem i would greatly appreciate

  • Linda Blessing
    Linda Blessing Jan 26, 2018

    Ok im having sorta the same problem. I need to hook up my engine control springs. I took a pic before disassembly however it got lost in the cloud.i have every manueal but they literally do not sjow me where to attach. Can you claim the woman card can somebody please help me I have a Craftsman 25 hp 48 riding mower with a kohler cv730s motor



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