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flooded motor

  • Thread starter Thread starter roux1100
  • Start date Start date
R

roux1100

Guest
i have an 1982 gs1100gl. i've been fighting with this thing for months now. the latest problem has been that after the bike sits up for a few days without being ran it will flood with fuel. i decided to pull the plug to change the oil and what i feared would happen did. i drained about 2 to 3 gallons of oil fuel mixture from my motor. i put new oil and gas in it along with some chemtool, mixed according to the directions on the bottle, and after a few times of the motor turning over it cranked right up and ran great. now its three days later and the bike wont start, im pretty sure that the fuel has once again gone into my motor and has flooded it again. im getting extremely frustrated with this bike since one day it will run fine and then a few days later it wont do jack crap. the only thing it did for me today was backfire hard as hell and scared the crap out of me. im assuming i have dirty carbs that are stuck open. ive also been lightly using starting fluid to try and crank the bike. any help or suggestions would be very appreciated.
 
Pull your fuel petcock and inspect it, fix it, or replace it. That is where all that the fuel is coming from. For some reason it is not shutting off the fuel to the carbs, hence flowing into the carbs past the needles and into the intake valve side etc etc. That much fuel sitting on top of the pistons will cause a hydraulic lock when you try to crank the motor.
 
Last edited:
Get another petcock and recheck the float heights in each carb..and check BOTH floats in each one as well so they are the same.
 
Make sure the petcock is not on Prime. It must be left on Run or Reserve to avoid flooding the carbs and the engine.
 
thank you very much for the quick responses. i will check my floats but i didnt realize that the petcock had a prime position. im new to the gs scene, if it isnt obvious yet. i've left the dang thing on prime.....thanks again very much for the help. maybe i should add that to the "gs deadly sins" thread.........
 
Pull the lines from the back of the petcock and run long ones down into a seperate pop bottle for each one. Set the petcock in the ON position ( ON INSIDE THE CIRCLE ) and let it sit overnight and see if theres gas in the bottle in the morning.If so, then the petcock is bad and youll be able to tell if its going down the fuel supply or down the vacuum supply. ..if not your good to go. And yes gas can run down the vac line..thru the carb and fill the crankcase with fuel.
 
Also check the washers around the needle seats. These can fail and allow gas to flow regardless of the floats.
 
Put the valve in the correct position. If it don't leak then you don't need to do anything.(to the valve)
 
I'm having the same issue with my #1 and #2 carbs, mine is also flowing out of the intake side of the carb as well as into the motor.
 
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