Greetings! Having issue with carb: engine floods. I give it a few hand cranks and after I remove air filter gas gushes out of carb. into air cleaner even when the gas valve is shut off.
any insights?
p.s. this is a B/S portable power generator with engine # 21T202-0119 G1
Looks like that is the carb with the plastic emulsion tube that the jet falls out of if turned upside down and and is easily missed on reassembly. Either that or the float valve isn't working to shut off the gas and the carb is over flowing.
thanks for the quick response. I did disassemble the carb to see if anything was obviously wrong and cleaned the passage ways with a thin wire. assuming i put everything back in place correctly, and no change. would i be better off just purchasing a new carb? i see prices ranging from 28.00 to 139.00 any advice?
OEM carb is $112. Item 117 on the following linked drawing is the part everybody looses because it will fall out when you are not looking. Also if item 137 is not in the correct position will prevent the fuel flow from being controlled by the float valve since the O ring between the plastic body and the carb body will not seal.
okay, I'm lost! I purchased a new carb, with all gaskets, etc. I replaced carb. according to instructions. I started engine and have the same problem!! The engine cranks, starts and runs for a @ minute before it sputters and stalls...then gas spurts out of the carb/intake. Even after I shut off the gas cock to the tank, gas continues to spurt from the carb. how is this possible with the gas supply line closed? there are no leaks, drips, etc from any other connections. there is only one gas input tube to the carb. WTF?
Okay, the fuel is coming from the breather tube; I assume my next steps are to drain the crankcase and refill with oil. However, what's to prevent the gas from refilling again? Where/how would the gas have entered in the first instance?
I appreciate your advice.
#12
dougand3
1. Check oil level with dipstick - is it thin and 1+ qt overfull?
2. Drain gas laden oil and fill to proper level
3. If old carb had needle/seat or float dysfunction, new carb will prevent gas from filling crankcase
4. A fuel shutoff valve is a really good addition here.
thanks for response...this is a portable power unit and has a fuel shut off valve; nevertheless, inordinate amounts of fuel spurt from the engine even though the valve is in shut off position (I start it with a shot of ether). I let the unit run until it stalls and I should think the gas is used up (with the valve shut off) and I amazed at the amount of fuel that remains and spurts out of the tube. It filled a 16 oz jar.
I will be draining the unit tomorrow, and the drain fill is in an awkward position so it will be hard to determine the true overfill level, but I will measure the amount that I drain into a container.
Sorry to take so long to respond; too many honey-do projects...
The crankcase was filled with gas as suggested. I drained oil, refilled, and everything seems normal again. Thanks to everyone who gave advice! This is a great site.
The reason why the engine filled with fuel is the float in the carb was not shutting off the fuel so it overfills then drains out of the air vent into the throat and from there into the engine.
The fuel contamination in the oil requires two oil changes so run the engine 15 minutes so the oil gets hot enough to boil off any remaining fuel then change it again .
The new carb should fix the float valve problem , for now but if it was caused by rust or debris from the fuel tank or little bits o rubber from a fuel line breaking down then you have cured the symptom, not the cause.
The contents of the old carb's fuel bowl should provide the clues
If there is rust in there then an in line fuel filter will catch most of what is coming from the fuel tank.
If there are little bits of rubber then you need to replace all of the fuel lines.
