Thread: XL 1200 Ltd RAW FUEL
06-08-2008, 12:14 PM #1
XL 1200 Ltd RAW FUEL
Greetings from sunny (for once!) England. I've just got back from a good day on the sea, and noticed that there is raw fuel coming from the exhaust when the engine is revved on the hose to flush it. I took out the plugs and saw a large mist of fuel coming out the plughole of cylinder 3 but not much out of 1 & 2. I've done a compression test and it's 100psi on cyl 3, and 120psi on cyls 1 & 2. Would this be down to a carb problem (rebuilt by Jim 20 hours ago), or something more sinister? I wondered if the reeds may be stuck, but would that cause the compression loss?
06-08-2008, 12:23 PM #2
i would have said carbs for the raw fuel untill i saw jims name on them
what was comp before your ride today...
06-08-2008, 12:29 PM #3
Hiya Paul. I tried to flush the carbs as much as I could after the BIG turnover in the winter (when the motor drank a few gallons of Irish Sea), but it could be that something is sticking in there, but would that cause a compression loss as well? The motor ran well today, but I did notice it didn't want to pick-up out of the holeshot quite as clean as usual.
06-08-2008, 12:30 PM #4
Sorry..... 120 on all 3 cyls
06-08-2008, 04:55 PM #5
06-08-2008, 05:00 PM #6
Cylinders 1 & 2 are 120psi (which is normal for this ski), cyl 3 is at 100 psi (it was 120 when I checked last week). You're right that it must be drowning in fuel, so the carb sticking (N/S?) is a good bet, but I wasn't sure why it would suddenly be down on compression?
06-08-2008, 05:09 PM #7
If you sucked in salt water it could be a needle and seat stock open, Mix oil in the tank and run it for a while alot of times the oil will free it up. And if you can reach and tap lightly on the carb. while the ski is running that might free it up.
06-09-2008, 02:15 AM #8
Thank's guys. I'll go with the carb idea, it makes most sense, but I'm still confused as to how this would affect the compression? Do you think that is a seperate issue to the fuel that's shown up at the same time, just to add confusion, or would the carb problem cause the drop in psi? Sorry to be a dumb#ss!
06-09-2008, 09:09 AM #9
It's unlikely that the carb issue is causing the loss in compression..!??
UNLESS you're getting SO much fuel in the cylinder, that its washing the walls clean..
This could lower the compression in that hole..
You could try pouring a teaspoon of two stroke oil down the plug hole...
Then check the compression again..??
It can't hurt, plus that's what I'd be trying next..!!
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