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'98 GTX-L Oil In Exhaust Pipe

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Ryan727

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Hey guys, so I finally got everything put back together on my new skis:

1. Built carbs, all screws on factory settings
2. Redid all fuel lines. Lines were already replaced off the grey lines, but it had been sitting so I did it again just to do it.
3. Replaced fuel selector
4. Ski was already converted to premix. Drained the old tank, almost looked like it was on 30:1, but I replaced with fresh premo fuel and 40:1 with the most expensive 2 stroke oil autozone had.
5. New plugs gapped to 0.2
6. Compression readings 150 on both cylinders
7. I believe this one has an SBT top end

So I try and fire her up. I pulled the fuel return and blew in it to get it all moving through the carbs. Crank her over and it finally fires up. SO MUCH SMOKE. This thing smoked me out of my carport and I had to take 5. The ski hadn't been ran in at least a year. Another thing I noticed when it fired up was bogging when trying to give it 50% throttle. It bogged, then died. Did fire up after though. I was running with the airbox off. Not that I meant to, I just forgot to put it on at the time.

So I also notice smoke was also coming out of the exhaust pipe, where the two pipes meet with the screw clamp. I pull the exhaust off, top part (the bigger one going into manifold) came off easy, and was damp inside. Overall looked healthy.

The second, lower pipe came off, and oil starts pouring out of it. Black oil. When I finally got it out, I took a pic:

IMG_20180701_151349.jpg

This was after most of it had poured out into my ski. All cleaned up now.

I also pulled the plugs to see what they were looking like, and they were wet with oil. Oil was brown, but not milky. Plugs themselves are too new to give any other signs. Still clean steel, just wet with oil. Plugs were not black at all.

Where's all this oil coming from? Again, I'm on premix 40:1, no oil pump.

Was it fogged previously? Is this a sign of that?

I only had it running for 2 separate 30 second intervals off the hose, between idle and 10% throttle. Not running on the hose until I can get it to stay running.
 
Marine mechanics in my area are notorious for pouring 2 stroke oil in the cylinders for storage. Hopefully that’s what you’ve got. If not you’ve got a possible bad crank seal. Crank it with the plugs out and see if it blows out oil.
 
I didn't blow out oil when I bought it and ran a comp test 3 times. The old plugs were wet with oil as well. Doesn't seem like the engine itself has a bunch in there, but obviously more present than I would think should be there.

Hoping it was just there for storage. I guess try and burn it off, and if it doesn't come back we're in good shape?
 
EDIT:
This a gtx limited? So it has a 947 engine in it? So no rotary valve then?

Possible it could of just been fogged when put away.
As long as your oil meets spec, id probably try and run it and see if it clears out.
 
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