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What causes the govenor to "surge"

Without a load on the engine, the govenor surges, causing the engine to surge.

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This is fuel starvation, check inline filters, check the brather in the filler cap, remove float bowl and blow out main jet with air line.

Posted on Jul 12, 2012

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6 Suggested Answers

6ya6ya

6ya staff

  • 2 Answers

SOURCE:

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Posted on Jan 02, 2017

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Anonymous

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SOURCE: Engine speed throbs

Unscrew the screw on the bottom of the carb until is runs right, if their isn't one use the lowest adjustment screw on the carb.

Posted on Mar 20, 2009

Anonymous

  • 40 Answers

SOURCE: Engine is surging.

hi,

sound through experience you have a air leak possible from a gasket or oring if so equipped. take some wd 40 and spray around the carb gaskets and seams. if this stabalises the surging or smooths it out it is definatley seeping air around it. in any case you will most likely need to take the carb back apart and repair or replace the gasket. hopes this helped. happy mowing!

Posted on Mar 29, 2009

Geoff

  • 413 Answers

SOURCE: engine on riding lawn mower surging

Dirty air cleaner.

Clogged fuel filter.

Replace or clean both...

Posted on May 29, 2009

roundo4

  • 133 Answers

SOURCE: What would cause the engine on my riding lawn

Usually when the engine is surging the govener spring is worn. I would get a can of carb and choke cleaner and with the engine cold spray all around the carb and then replace the govener spring. You can get the spring locally from your local small engine repair shop. Just take the model, type, and code off of your engine to them. The numbers can usually be found on the engine shroud. Or you might get lucky and have a decal with them on.

Let me know if this helps
Thanks
roundo4

Posted on Sep 02, 2009

GM Elec

Bruce Bracey

  • 1000 Answers

SOURCE: I have a 16.5 h.p. briggs & stratton in a

The fuel filter is a good place to start. Make sure it flows freely and does not seem to have back pressure when you blow through it. Also, inside the fuel tank may be a small screen over the fuel hose inlet. Use a flash light and look through the fuel fill opening and see if you can see it. Make sure there is no debris covering the screen. If you see any debris in the bottom of the tank, remove the tank and clean it out.
Good luck, let me know,
Regards,

Posted on Sep 14, 2009

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13 hp tecumseh riding mower engine surges when mower is not engaged. It runs well when mower is engaged


"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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1 Answer

RWhat is causing it to surge?


If you don't have at least some load on these, they surge a bit as the govenor "hunts". Put at least a few hundred Watts of load on it and see if it stabilizes.

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When a small engine "surges" in all speed ranges the possible causes are:

*Dirty air filter

*Water or contamination in the fuel system.

*Breaks in the spark plug wire (leaking), loose or corroded terminal connections causing an intermittent failure.

*Misadjusted or malfunctioning governor.

Problems with surging only when under load or at idle are likely caused by carb blockage or misadjustment.

Hope this helped and good luck to ya!

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1 Answer

Engine surges under load and not under load


Surging is often caused by a bad sensor in the air/fuel supply - MAP, IAC or TPS. Check for trouble codes (DTCs) using a good code reader.

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If it still surges after this unscrew the nut that holds the bowl This is the main jet, make sure hole (jet) is clean.

run the engine up no load screw it out untill the engine runs rich then slowly turn it back in untill it clears..then load it and do the same.

the arm is the govenor trying to play catch up this is normal.
tis is of corse that it has the mixture screw in the bowl..

If not remove the bowl locate the jet and clean it..

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1 Answer

When motor is at idle speed it surges


Try a simple test. It is ok to run the pump without water for a short time. Check idle speed without water in system to see if enginet surges. If it does not surge, then most likely the unloader/ pressure valve is causing the engine to surge when in the unloaded state. Life of unloader /pressure valve is shortened by letting system bypass for long periods of time. Enjoy

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Check for vacume leaks. Hoses and around intake gaskets.spray some carb cleaner around intake gaskets.

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