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How do you know it is flooding out and not leaning out. Is the idle mixture that far out of adjustment. Maybe someone else can help. I would not expect flooding from a vacuum piston/diaphragm problem at idle, nor an accelerator pump system problem however if the check valve is leaking, maybe that, Maybe a misadjusted float level allowing too high a level of fuel in the float bowl which could cause flooding but this is an enrichener not a choke even though entitled as a choke, so I would expect that with the enrichener system shut off there would be LESS fuel for a given throttle opening at idle, maybe a badly plugged air filter but I would expect idle problems also with that, ANYWAY, you need the carb overhauled. Before that try smacking the side or bottom of the carb with a phenolic or plastic screwdriver handle and see if that does anything as it might with a stuck float or needle and seat and possibly even if the accelerator pump check valve is stuck open somewhat. Remove and check your plugs for signs of an over rich condition or a lean condition also. When you do get this solved please post a comment to advise what you found for the benefit of others.
This sounds like the carb is flooding, there is a rubber tipped needle under the metering side of the carb, this may be leaking, before replacing the needle make sure the air filter is not blocked, replace with a new filter and try again
HI, IF IT IS FLOODED, TURN OF THE FUEL AND OPEN THE THROTTLE FULLY AND KEEP AT THIS POSITION WITHOUT THE CHOKE,KICK REPEATINGLY AND IT MAY FIRE EVENTUALY,
RREMEMBER THAT THE CHOKE INITIALY FLOODS THE ENGINE FOR COLD STARTING, SO USING THE CHOKE WHEN ALLREADY FLOODED WILL WORSEN THINGS,
YOU COULD PROBABLY REMOVE THE EXHAUST TO DISPENSE THE FUEL QUICKER AND PUT IN A CLEAN PLUG, I WOULD DO THIS BEFORE I STRIP DOWN THE CARB TO SEE IF THE PROBLEM CLEARS, AS THE BIKE WAS PREVIOUSLY RUNNING IT SEEMS ODD TO START MAKING ADDJUSTMENTS
Check the carb fuel stub to see if its seated in the hose. Chech to see if you re-installed the piston underside scavenge hose to the bottom stub of the carb. Check your compression. New is 160 psi, operational but problematic (hard start) 130~140 and completely toast at 90. This saw is easy to flood when compression has fallen off. Cold start, 3 pulls choke on with the throttle trigger locked wide open. At first sputter, put choke in normal run and it should fire by the 3rd pull. If not its flooded. Then remove the plug and with an air hose vacate the cylinder of fuel for a few minutes and try again without the choke or throttle lock set at wide open.
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