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I have a Chraftsman lawn vac. that has the carb. off. I need assistance in hooking the govenor back up. I am not sure what holes the linckage came out of. Do you have any diagrams on this It is a 4.5 HP model. The sears motor number is 143014500 Thank you. Mark

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With the throttle in the idle position it the hole closest to the throttle shaft, if the engine has some age on it you can see where the throttle rod has been.........as far as a diagram to show how it goes there isnt one to my knowlege........i snap pics with my dig camera before i dissasemble somthing that i might not rem just how it went. hope these tips help good luck!

Posted on Nov 19, 2009

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How to take out carburetor from a briggs and stratton 550ex lawn mower?


remove top cover then breather cover take out three screws pull base plate breath cover off there is a hose connect in back of plat it will slip off make sure you no were it goes on reassembly once plate is off there are 2 screws 3/8 that hold on the carb take them out carb will slip off intake pipe check intake pipe for cracks or holes slip off carb the linkage is still attached pay attention to how it is hook up take sometime to study how it hook uo then slip linkage out of hole you have your fist carb off reinstall in reverse order once you rebuild shouldnt need any adjustment the red neck saya let me no if i can help you

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Springs on carb how do they go.


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I have a yard machine push mower that is a few years old and it starts fine but runs at high idle unless you pull the choke out


Try adjusting the spring to the throttle. This would be on the carb and what the governor attaches to. The spring will be contected to the throttle and an anchor point that you would be able to bend slightly. I would also check to make sure the connector on the throttle shaft on the carburetor is in the correct hole. Hope this helps!

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1 Answer

My Craftsman 675 190cc starts in full throttle what could be causing this


sounds like the carburetor is a little gummy and when the engine shuts off it goes to full throttle by the govenor for easy starting but is supposed to return to the set 3600 rpm. try spraying carb clean on the carb and wiggle the govenor arm to make sure it move freely

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Toro rider 16-38 HXL when I start it revs at FULL speed and sounds like it will blow up. I slow it down with choke all other linkage seems to be in place properly- Is there a trick to fixing?


Three options:

1. The carburetor throttle plate (closest to the engine is stuck); clean it with gumout and work it back and forth

2. the linkage is hooked in the wrong hole ; check the wear pattern on the throttle shaft plate to see if it is in the wrong hole.

3. The govenor arm or gear is not adjusted properly; loosten the govenor arm, push the throttle plate of the carburetor all the way closed. push the govenor arm the same direction all the way until it bottoms out. tighten the arm clamp. Test again

I recommend getting a manual or at least a free parts diagram from a local shop like www.arcolawn.com

Good luck
Joe

please vote me up if the fix was good.

Dec 29, 2010 | Toro Lawn Mower With Toro Power Tools

1 Answer

I have an old tecumseh 10 hp eng model vm100. with carb problem


Rigid link to the top hole on govenor arm, spring link to second hole. If engine 'hunts', try the 3rd or 4th hole. Each lower hole will take off a few rpm, but make the engine less prone to 'overshoot' the goverened speed.

If you have not disturbed the govenor arm clamp where it fixes to the shaft that goes into the engine, that should be all you have to do if you have, proceed as follows ;-

Assemble as above. With engine OFF, loosen the govenor clamp. Push the end of the govenor arm so the carb throttle is wide open. Whilst holding it there, rotate the shaft in the same direction as the arm would have rotated it if you hadn't lostened the clamp. Ensure it's rotated as far as possible (this removes ant 'lost' movement in the internal govenor mechanism.). Now tighten the clamp and release everything. Push the speed control to FAST. The throttle should open, and it will requirer about 4 OZ of force on the end of the govenor arm to close the carb throttle. This force will be generated by the govenor when the engine is started

Move the speed conrol to SLOW. Most of the tention should disappear, allowing the throttle to close with very lettle pressure on the govenor arm.

If all this behaves as described, you should be safe to start.

May 11, 2010 | Garden

1 Answer

Carb. Problem?


It could be the linkage from the govenor to the carb, maybe the throttle shutter is stuck. Try WD 40.

May 17, 2009 | Toro Lawn Mower With Toro Power Tools

1 Answer

Carb and throttle linkage on a Tecumsen LEV120 361015A


You want the spring to hold tension against the governor.

May 17, 2009 | Garden

1 Answer

Tecumseh engine #143.985510 - carb linkage hook-up


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)

May 13, 2009 | Garden

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