GZ 250 Forums - View Single Post

Water Warrior 2 · 06-18-2009, 04:24 PM

Interesting problem. Let's keep it simple and start with the small stuff. Is the petcock in the normal OR reserve position ? If it is in the res position that might be your problem. The gas will always be trying to flow by gravity even when the bike is parked and not running. A little wear and tear in the carb and you will have unburned gas making it's way down through the engine. The wet spark plug suggests to me that gas is finding it way to the cylinder and past the rings into the bottom of the engine.
If this is the problem it is a cheap fix. Turn the petcock to the run position where it is vacumm controlled. Next you will need to get rid of the contaminated oil and gas mixture. "I" would do 2 oil changes soonest. 1st change to replace the bad stuff in the engine. Run the engine for 2 or 3 minutes to relube all the moving parts and clean any remaining gas out of there. 2nd, wait 5 minutes and do another oil change and filter to replace the new but contaminated oil.
I do hope this is the solution to a bad looking situation.

06-18-2009, 04:24 PM	#7
Water Warrior 2 Senior Member Join Date: Dec 2006 Location: Squamish B.C Canada Posts: 11,409	Re: petrol in my oil. Interesting problem. Let's keep it simple and start with the small stuff. Is the petcock in the normal OR reserve position ? If it is in the res position that might be your problem. The gas will always be trying to flow by gravity even when the bike is parked and not running. A little wear and tear in the carb and you will have unburned gas making it's way down through the engine. The wet spark plug suggests to me that gas is finding it way to the cylinder and past the rings into the bottom of the engine. If this is the problem it is a cheap fix. Turn the petcock to the run position where it is vacumm controlled. Next you will need to get rid of the contaminated oil and gas mixture. "I" would do 2 oil changes soonest. 1st change to replace the bad stuff in the engine. Run the engine for 2 or 3 minutes to relube all the moving parts and clean any remaining gas out of there. 2nd, wait 5 minutes and do another oil change and filter to replace the new but contaminated oil. I do hope this is the solution to a bad looking situation.
	0