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Looking for the ENGINE manual for a Yardman 20" mower, model #11A-108Q401.

Engine surges.

Posted by Anonymous on


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Posted on Jan 02, 2017

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SOURCE: New MasterCut mower runs erratic & gasoline leak around fuel cap.

as it is a new machine if it has not been by dealer it may be that some test fuel residue is in carburettor which is causing this,you need do drain of carburettor of all fuel,remove bowl and spray clean useing either air or carb cleaner spray(should get from local autoparts store) note try to spray up centre of carb as may be a jet up there as well,refitt bowl and make sure you use fresh fuel this should solve problem,with unstable running fuel may be finding a way back through breather at carb with the vibration and may be cured after you have done carb

Posted on Mar 30, 2009

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SOURCE: Briggs and stratton engine surges and slows, repeatedly

There is still either water or debree contaminating the fuel system. Surging is usually debree, empty and flush the tank with gas or Iso alcohol, disassemble carb soak in solvent for 30 minutes blow out the carb passages, reassemble and if the problem persists run engine at top rpm with air cleaner off and block off carb intake with hand, this will stall the motor restart and repeat 4 - 5 times this wiil draw out any debree or other blockage in the carb.

Posted on Jul 25, 2009

  • 1 Answer

SOURCE: Troy Bilt model 542(11a-542-q711)has Honda 160cc

I need Gaskets for caboretor

Posted on Sep 08, 2009

  • 389 Answers

SOURCE: oil for yardman lawn mower

Only 30wt DETERGENT HIGH QUALITY oil, never use NON detergent or 10-40. Takes approx. 20 ounces to fill

Posted on Sep 14, 2009

  • 396 Answers

SOURCE: 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.

Posted on Oct 11, 2009

Testimonial: "Thanks, I think I can figure out which is the High speed jet, it's the other one besides the one that restricts the throttle from going below a level."

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You passed the mower model number and not the engine model number. When we use the 11A number you passed all we get is the base and handle parts. If you need more help I need the model number off the engine just above the spark plug wire on the air shroud.

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