Question about Mtd 22" Yard Machine Push Mower

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Tecumseh lawn mower idle surge

Just got this (used 2007) mower and it ran fine the first week but this week the idle flares up and down and wants to die.

Posted by Anonymous on

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  • Expert
  • 416 Answers

Clean air filter and the carb use non ethynol gas

Posted on Feb 19, 2015

6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

  • 53 Answers

SOURCE: The mower is 3 months old worked fine untill yesterday

the problem is either u have trash in the bowl of the carb or the float in the carb is stuck. either way u need to have someone look at it.

Posted on Aug 12, 2009

cq92
  • 184 Answers

SOURCE: 3 Hp Tecumseh lawn mower wont stay running?

Probably a carburetor problem. Old fuel, tiny amounts of water, plugged jets or a totally plugged air filter will cause that. Another option may be the throttle linkage is either unhooked or bent.
Remember to shut off the gas tank or empty it or plug the line before opening a carb or removing the carb.
Carb first, on the bottom is a float bowl held in place with a bolt that is hollow and is also a fuel jet. Remove the sediment(float) bowl and make sure it is clean, make sure the gasket on top is not damaged.Make sure the float moves freely up and down and the needle valve is not stuck. Make sure nothing is bent or shows rub marks on the float. Clean the needle valve and all orfices in the carb by spraying carb cleaner through them.The "bolt" that holds the float bowl is usually brass and hollow in the center with two tiny holes that are horizontal, if the center or the holes on the side get plugged - the engine will not run, it will only run until it uses up the gas that seeps into the center. Remove any gaskets first as carb cleaner will cause rubber to expand and get very soft. It is best to usually remove the carb to do a thorough cleaning.When every thing is clean reassemble and reinstall the carb. Clean the air filter thoroughly with some solvent or gasoline, and let it dry (foam filters) for paper filters, blow them clean from the inside using compressed air.
When all is back together, check to see the wire linkages are in their proper place and that they move freely.
Also ensure the choke is not on and that it works properly when it is started. Occasionally also this problem may be caused by a defective primer bulb if it has one. Usually if defective it will either leak or not work. Some are made with a tiny hole in the end, covering it will cause the engine to speed up.

Posted on Aug 30, 2009

bbreton
  • 437 Answers

SOURCE: I have a MTD Lawn Tractor and it has the 18HP

May be time for a tune up; Change spark plug; Air filter; oil, fuel filter. It may be starving for air or fuel.

Posted on Oct 06, 2009

  • 1 Answer

SOURCE: i have an MTD 3.5 hp Tecumseh lawn mower. The

WHAT KIND OF OIL DO I NEED FOR THE LAWN MOWER

Posted on May 14, 2010

  • 1 Answer

SOURCE: Lawn mower chugging

better late than never, I have the same mower

there is no throttle control on these mowers, if you look under the air filter the throttle is balanced by a spring pulling in one direction and a lever controlled by engine speed. if the spring breaks or falls off the lever will wiggle back and forth, more gas if the engine slows, less if it speeds up. you end up going fast/slow/fast/slow etc.

The tension spring slows the switching down and smooths out the engine speed.

Posted on Jul 08, 2011

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1 Answer

Tecumseh motor is stuck on high idle. The throttle is on low, but it idles very high. I tried bending the governor linkage and moving the governor spring up and down.


the governor lever near the engine has an adjustment

try looking on
youtube quite a few demos of how to adjust a govenor

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"Govenor hunting" caused by a lean condition ,carb is starving for fuel ! Dirt in carb or water,or out of adjustment ,or leaking throttle shaft ....usually it is a plugged low idle passage,that causes this condition,and is almost impossible to remedy,but a good cleaning might help .....does it only governor hunt at low idle ? If so thats the issue !

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I have a Sears Craftsman mower with Tecumseh, major oil leak


On many Tecumseh engines, there is a crankcase breather located under the flywheel. It has a cork gasket to seal the top plate of the breather. Either the rubber breather housing is cracked, or the cork gasket needs replaced.

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Engine speed surges


Surging engines in lawn mowers are usually related to a lean fuel/air mixture. With today's environmental concerns, the carburetors on these engines are set with a very lean mixture (to reduce air pollution). Furthermore, they usually put limiter caps on the carburetors where you cannot easily adjust the mix to get the engine to run better.

If there are adjustment screws on the carburetor, try turning the high speed adjustment screw a bit counter-clockwise (if the limiter cap will allow it). This will enrich the fuel/air mix a bit and might help the engine run a bit better.

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1 Answer

Lawnmower throttles up and down


locate the carberator the unscrew the 1/2' bolt under the float bowl to remove the bowl empty and clean out the bowl reinstall making sure the o-ring is centered for the bowl it acts as a sealing ring for the bowl screw the bolt back in and tighten, this should solve the surging problem.

Sep 12, 2009 | Tecumseh Lawn Boy Push Mowers Insight...

1 Answer

Silver series 6.5 hp surging


  1. Carburetor is dirty.
  2. Air leak in carburetor or intake manifold (e.g., bad O-ring, gasket, primer).
  3. Carburetor is improperly adjusted
These are some of the more typical reasons that can cause a small engine to surge.

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1 Answer

Mower surging silver serieslawn boy 6.5 h.p. tecumseh motor model lev 120 spec 362006a. I cleaned out carb bought a rebuild kit replaced o rings in center jet and another under float also little metal...


let it surge, it will usually get better as it warms up. These 6.5 Hp engines are fine except they have an cheap badly designed carburator. Nothing can be done about this problem. They all surge eventually.

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My mtd tradesman lawn mower does not run smooth. where is the idle mixture adj. screw? the engine is the tecumseh 5.5 hp model #VLV55 501029A(D)


The newer machines do not have a way for you to adjust the Idle, what you can do is change the spark plug or spray some carb cleaner or remove the air filter and run it for a few minutes without the air filter and see what happens

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