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Post by Fox on Apr 27, 2010 20:12:55 GMT -5
Every time I run the yellow scooter and park it I get a puddle of gassy smelling oil dripping from the air box. It's not a lot. It's just enough so I have about ten little oil spots all over my shop floor now. I lowered the float level but that didn't help. Is it due to that split-second in the stroke where the intake is open and the fuel gets shot back into the carb? Bad reed?
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Post by drawkward on Apr 27, 2010 20:46:11 GMT -5
I know when I would run without a filter and put my hand over the inlet of the carb to choke it, that my hand would be covered with gas. Just kind of goes with the territory with these reed-valve two strokes, I guess. Maybe 2strokd can let us know if he has this problem with his new CF reeds, as well...
Also, I don't think it's really fuel getting shot back from the engine, as much as it is a pressure wave that pushes the fuel from the main jet towards the carb inlet. By my logic, there would ALWAYS be a little bit of fuel being pushed towards the carb inlet. Physics. Every action has an equal and opposite reaction. Valves closing pushes the air behind them, which pushes the air directly over the main jet which causes a backwards flow of fuel. Even if for a split second. But it does sound like you have an excessive amount of back pressure. Reeds can go bad and fall into the crank case! Check them before they do. Maybe if they are sitting open at rest, you could flip them around so they sit nice and tight on the block? I know mine were, and I just flipped them around and they sat tight.
PS- Are you running with premix or the auto mixer?
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Post by Fox on Apr 27, 2010 21:20:20 GMT -5
PS- Are you running with premix or the auto mixer? Pre-mix. I'll check the reeds when I get a day off. Thnx |
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Post by 90GTVert on Apr 28, 2010 4:43:29 GMT -5
Gas and oil soaked filters are not normal. My stock airboxes or free flow filters do not get covered in gas and oil. A smell of gas and oil, sure. Maybe even a light residue. It should not be dripping though. I agree that you should check the reeds.
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Post by 2strokd on Apr 28, 2010 7:52:53 GMT -5
Yep, reeds and choke maybe?
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Post by Fox on Apr 28, 2010 10:11:15 GMT -5
I just went out there to check the reeds and realized that there is a flat steel plate welded on the frame just above the forward half of the intake/reed cage area and a squared off bracket set-up coming off that that surrounds the intake so the engine mount has to be removed to get the intake off there as shown in this pic I took of the red scooters innards before I sold it. I guess i better just replace the reeds rather than flip them over since it's such a hassle to get to. Any recommendations/links to the best ones?  |
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Post by redorchestra on May 4, 2010 0:09:23 GMT -5
Well this a great topic since I was just about to ask the same thing. I'm running an open filter and a drilled main jet. When I removed the filter the other day the pipe had a coating of gasoline inside. I hope my reeds are easier to get to.
Thanks for asking and good luck to you!~
Joe
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Post by 90GTVert on May 4, 2010 6:05:50 GMT -5
It's normal to have a light coating of fuel from my experience. Some fuel is going to travel backwards. When you have so much that it's running out, that's a problem.
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