Briggs O.H.V. 17.5

[Butch1957]

ON this Briggs OHV, It has a Nikki Carburetor. I have cleaned it throughly several times and when running it Sputters and Coughs. It is the carby for sure. I have gapped the valves and I have replaced the timing key. Everything checks out but when I reeve up the engine it sputters alot.

Any idea / Comments ?

Please respond.

Thanks.

Ref: 31c707
0230-e1
0305

 

[ILENGINE]

Are you sure it is the carb and not the spark plug misfiring, or ignition module not gapped properly, or faulty.

 

[twinfords]

whe you say cleaned the carb do you mean rebuild it? if not do it. could be misfire as well, did you adjust the valves @ 1/4 past TDC? also head gasket good?

 

[Butch1957]

This mower / engine had old gas and the carby seemed pretty clean, other than it stunk a bit like stale fuel. everything inside the carby seemed real clean. it has a new head gasket and the exhaust valve is set at .06 on clearance and the intake at .04 at TDC. I pulled the coil and i sanded the contacts along as the flywheel and re-gapped the air gap at Business Card thickness. I also put a new Plug ( OHV ) and I also replaced the timing key and the fuel that was in the gas tank.

It runs at idle speed but rough and sputters when i excelerate it. Seems like it is fuel / carby related. It has a Nikki Bowl type carburetor. I just do not know what else to do.

Thanks.

 

[Schmiedl]

Does it have a fuel solenoid on the bottom of the carb?

 

[Shedmechanic]

High Speed circuit has some type of obstruction in it. Rebuild carb or get a new one.