Questionthis generator set has a briggs model #197412 engine. engine starts if i shoot gas in carb for 2-3 sec. then dies out unless i squirt more gas in. Pulled carb of and pulled jets out cleaned everything good. this unit has a fuel pump and it doesnt seem to be pumping. is it possible to see if pump is working somehow. i would just buy anew pump if i was sure this is the problem but would like your opinion first. Thank you for your time, George
Answer if you crank this engine over with the starter and have taken the fuel line off @ the carburettor does the fuel come out at full flow with each revolution ?
if so its not the pump it putting fuel from tank to carb ok
next is the fuel bowl full when fuel line is connected to carb and engine is cranked over with starter ?
if so then i would check 1st the gasket between manifold and cylinder
then i would check the would be for correct valve clearance would should be 0.005" to 0.007"
intake and 0.009" to 0.011 " ex at tdc compression stroke
if unit has a tight inlet valve unit might have this problem check it may need a valve grind ?
the other thing to do is a leak down test this pressurizes the combustion chamber with air
and you can find out what components are leaking and how much
because burnt valves and seats will cause a vaccum not to be created and air fuel mixture will not be drawn in on intake stroke ready for compression and igniting
worst case cenario is camshaft timming is out but could really on a problem if engine had been previously rebuilt
remember -:
F A C T S
Fuel
Air
Compression
Timming
Spark
all 5 needed for engine to run correctly
cheers hopes this helps paul
ps let me know
