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![]() Turn off bike, drain & refill gear oil (AGAIN)Ī. If/when the bike catches & runs, let it warm up.ĩ. Attempt to start bike as if it were flooded (it is)Ĩ. Drain the exhaust by tipping the bike over to the left side.ħ. Kick the engine over a couple times to clear the cylinder.ĥ. Leave the ignition (Key/Kill) in the "OFF" position.Ĥ. It's a flaw in the Si design, and carried over to the later copies.Ģ. Even with a new jet & cleaned out bowl area, you'll still occasionally flood the motor. Your DelOrto SI carb will let fuel seep past, it's typical. ![]() Common on old Vespas and similar copies.Ģ. Your fuel petcock was either left in the "On" position, or the rubber grommet is hosed inside the petcock. Do a google search on how to read plugs.Ĭlick to expand.I'll assume this is either a Stella or old Vespa eh? :)ġ. The key here is to resolve the problem that caused the overflow FIRST, then resolve the "gas in the wrong places" problem.įWIW, plugs should be a light tan, not chocolate brown. ![]() The gas will have washed any and all lubrication off of the cylinders, and running it now will be basically like running with no oil: you WILL damage the pistons and/or cylinders. Prolly wouldn't hurt to swap in new plugs, while you're at it.īefore you reinstall the plugs, squirt some fresh motor oil down into the cylinders & crank it over a bit. BTW, don't do this inside your garage, you will probably get gas on EVERYTHING. Pull the spark plugs, then crank the motor over until no more fluid comes out. Gas is a very poor lubricant, and can cause problems with seals. Adding an in-line fuel filter isn't a bad idea, either.ĭO AN OIL CHANGE - the gas will seep past the rings and collect in the crankcase. Your steps to recovery are: yank the carbs off, pull the floats off, remove the float valve assembly (needle & seat) clean those bits thoroughly and blow out the carb passages & reassemble. It's possible to bend/break stuff inside if there is even a teeeeeensy bit more liquid in the cylinder than the volume of the combustion chamber at TDC. It's not advisable to try to crank the motor if the cylinders have liquid in them. Sometimes the gas will go out the exhaust valve, filling the exhaust. Most likely, it's a piece of dirt/detritus/crap holding a float valve open, combined with the petcock being in the "prime" position, or the "on" position if it's a non-vacuum-operated petcock.Ī leaky float valve won't necessarily cause an obvious leak, like dripping on the floor, but the gas can run down the intake port, and fill the cylinder if the intake valve is open, or the intake valve leaks.
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