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I have 11hp Briggs that hunts at all rooms and loads. Replaced Carb with brand new one, checked and set governor. Still doing it! It will run smooth with choke on slightly so obviously it's running lean what am I missing

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  • Garden Master
  • 2,475 Answers

Is carb. set right right, that out 1 1/2 turns.

Posted on May 11, 2014

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6ya6ya
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Posted on Jan 02, 2017

  • 1 Answer

SOURCE: Weird under load symptom briggs 17.5

a couple other checks would be to dump the carb resevoir where the float is, water under the float could be accumulated and closing the fuel off, due to density. out here on the farm we never use the gas to the last drop from the can. also the linkage between the motor fan blade, (govenor) might have been connected to the carb incorrectly. or a bad switch interlock on the mower blade.
some briggs motors are hooked wrong straight from the factory, where the throttle linkage is concerned. ( and the little spring is pretty hokey too)

Posted on May 17, 2009

  • 130 Answers

SOURCE: Intek engine runs poorly under load and when warm

if you have a ohv ajust valves and you might have to rebuild carb.

Posted on Jul 18, 2009

bargainbin2
  • 123 Answers

SOURCE: Why does my mower shut off after I turn the choke off?

It sounds like you took the carb off the engine and did not replace the gasket or tore the gasket and it is sucking too much air. Also check to see if the carb and bracket ( if it has one ) are on straight.

Posted on Sep 12, 2009

  • 202 Answers

SOURCE: motor chokes and misses under moderate load and loses power

Sounds to me as tho it might need a carburetor adjustment, providing there is an adjustment screw on the carb. Sounds like the engine is running a bit lean. Did this problem occur right after the carb cleaning, or was it there in advance? Is there a fuel filter that might be clogged?

Posted on Jan 19, 2010

  • 640 Answers

SOURCE: Kohler Command V twin 20.5

I think that there is still a piece of trash in the idle circuit. Did you remove the adjusting screw when you cleaned it?

Posted on Aug 29, 2011

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My Honda gx340 is revving high all the time Can some one tell me y thank you


should be an internal govenor on a plant unit like that

...
there is a thicker than normal metal rod running off the carby to the motor and that is where you adjust the govenor

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1 Answer

Engine not running smooth until blade is activated


ill bet this is an older briggs engine ? as they seem to need a little tlc on there governor speed control spring for it's feedback to the throttle , this makes the engine surge a bit (hunting) till a load is placed on it then it runs smooth , now if it doesn't smooth out under load id suspect a carb fuel flow problem

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Briggs and Stratton Vanguard 26hp. The idle fluctuates, hunts and surges. When under load such as moving or PTO running then it quits surging and runs fine.


Hi Jahn:
Sounds like it could be a spring on the carb / governor linkage.
I'd suggest you have a relly good look around the carb, wiggle the linkages, and look for one that seems loose. If you find a dangling spring odds are you'll be on the problem.

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Hi, I have an 11hp briggs and stratton engine on a rancher 2 ride on mower which I replaced. However this engine was given to me and is in excellent condition. I don't know if it had been reringed or


If the engine races and cannot be controlled with the throttle the throttle plate may have come off the shaft in the carb. Check the carb and see if the throttle plate is missing. If so you will need to retrieve it from the intake tract and replace with a new one being sure to use loc-tite on the screws.
To adjust the governor place the throttle control at full throttle. loosen clamp on external governor arm. with pliers turn shaft fully clockwise. Hold there and retighten clamp.

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Simplicity landlord dlx tractor mower


Try looking at the Governor on the engine. You can usually adjust this out at the Gov arm by loosening and tightening back when smooth. Could also still be dirt in the jets. Make sure all the small holes on he carb are clear and check the float height too.

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Briggs and Stratton 19.5 hp 42e707 Hunts and Surges


Are you sure you got all the passageways in the carb cleaned out?

How did it look when you first disassebled it? Full of rust and gunk or just shellac on the surfaces?

Take the fuel line off at the carb and MAKE SURE that fuel flows freely. I have seen trash get in the tank and plub the other end up. Does it have a vaccuum operated fuel pump?

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Honda IZY engine hunts. I mean the speed pulses rhythmically!


Just adjust the idle speed control/Fuel air screw located pointing downward on the bowl of the carb,Just start the engine,idle up high and turn the screw until it levels out and runs smooth.

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Porter Cable 5500w generator (10hp BS) will not regulate speed.


While attending college I worked at a tool rental center and learned a great deal about matching generators to customer requirements and troubleshooting customer owned units. There are simple tests that you can perform, however, first some info on what to expect from a generator. Most generators are overrated and under powered. You should only expect to get about 60 - 75% of rating. Example, a commercial honda 5000w generator has an 11hp motor that can only produce about 9.5 hp at 3600 rpm. If a customer needed 5000w of power, we would rent them an 8000w generator because as the generator is loaded to max the voltage will drop. You generator will probably only provide steady voltage ex. 115v at 60 cycles to about 3500w then voltage will begin to drop. New generators have automatic voltage regulator that varies the power to the armature increasing/decreasing the power of the magnet. These voltage regulators suffer a high failure rate and are expensive. If your generator is not giving you 3500 watt at 115v 60 cycles your engine may have a few problems and your power generator end may need tweaking. (I would not expect to achieve 5500w at 115v with briggs 10hp) .
The governor is about 2 inches in diameter and turns off the cam gear inside the engine. It is flyball type with two or three small arms that react to rpm. The faster the engine turns, more force is applied to the governor arm to reduce engine speed. Easy to test, with engine running use finger pressure against the arm to increase speed and you should feel a greater resistance as the engine speed increases. Another simple test, remove air filter to expose butterfly inside the carb. Move the governor arm and check that the butterfly opens fully. If it does not open fully linkage and governor is not set correctly. Next, start engine and load generator up to max and check that butterfly opens to full as the load increases. When the butterfly opens all the way under load the engine is at max. Add up the wattage of all the tools/appliances you used to load the engine to get an idea of max load . Lets assume that the shop adjusted the governor properly, if the governor was not working the engine would over rev. and damage would occur. As you were told the governor spring controls speed and can be adjusted somewhat by bending tab or adjustment screw. But a review of your generator manual or that series of briggs engine will show that there are several governor springs available and different placement holes on the governor arm to attach the spring that will change the power curve. Pulling on the spring can only do so much, however changing the spring to different gauge /turns/material or differnet location on the governor arm will cause the engine to perform differently. These springs are sold thru briggs dealers by part number for your engine. This would be considered tweaking to get a different power curve.
Now for the generator. Some generators have a capacitor incorporated in the windings. This capacitor must measure within 95% of rating. Remove from circuit for testing. Finally look very carefully at the commutator rings for any evidence of brush bounce. If the brushes do not perfectly seat you will lose power. If your generator is brushless you can only hope that the diodes are within spec. because it is too difficult to test them. They also must be removed to test. Finally if your generator has an automatic voltage regulator the only test would be to replace with a known good part. At the rental center we stocked spare parts so that we could quickly find fault. There is soo much to learn and the life too short. I hope this helps good luck, please email your questions.

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