After all the horror stories I've read on here, I finally decided to replace the old gray fuel lines and rebuild the carbs to make sure the green goo hadn't struck my system. I got it all wrapped up last night without any obvious issues and actually got it running again, but the idle speed is way too fast. I backed out the idle speed screw but there wasn't any change even after a couple of restarts. PTO flame arrester and plug were pretty oily afterwards but not on the MAG side. Any suggestions on next steps? All parts were stock replacements without any mods.
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Run away idle after carb rebuild on 96 GSX
- Thread starter doogie
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ski-d00
Well-Known Member
make sure your throttle cable is working properly, not bound up, and that the butterfly valves are really closed.
verify that all your fuel line connections are tight and sealed.
verify that your carb gaskets are still in place and properly sealed with the carb bolts tight.
did you reset the idle screws to factory position?
it's either sucking air from somewhere(gaskets, hoses, etc.), carb throttle is not set correctly, idle screw settings not correct, or it's not getting enough fuel(bad pump or vac line seal). this is what usually causes engine runaway. pull the choke to kill it when it runs away.
verify that all your fuel line connections are tight and sealed.
verify that your carb gaskets are still in place and properly sealed with the carb bolts tight.
did you reset the idle screws to factory position?
it's either sucking air from somewhere(gaskets, hoses, etc.), carb throttle is not set correctly, idle screw settings not correct, or it's not getting enough fuel(bad pump or vac line seal). this is what usually causes engine runaway. pull the choke to kill it when it runs away.
super1c
New Member
X2 on the air leak.
Prolly just a carb base seal slipped off while you were lowering the carb bodies down, remove them and take a second look, a little blob of grease should hold each of them still while you place the carbs back and drop the screws in and give them just one turn until you know the bolts went thru the little holes, a small mirror and flashlight will go a long way at this moment before you snug up all the screws.
Fuel baffle is clean, gaskets are in place and idle screw is all the way out. I readjusted the carb linkage length with some success, but it's still idling at 4000 out of the water with arresters in place. I'm out of ideas and will just have to run it up to the shop for their opinion.
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