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Gordon

by Gordon Murray in 912 / 914 Technical Questions 5 years ago

Rotax 912ULS Engine only done about 80 Hours!

I have fuel leaking into my oil reservoir. I have tried the following:

No leak through the fuel pump. Checked both carbs. Done compression test.

Could it be glazed cylinders?

Re: Gordon

by Garrett Wysocki » 5 years ago

Garrett Wysocki

1 572 1.45k

No, not glazed cylinders they have a ceramic coating on them. The only thing that can touch them is a diamond hone. Recheck your carburetors that's the only way fuel could be entering the engine. Send pictures.

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Re: Gordon

by Jim Isaacs » 5 years ago

Jim Isaacs

17 319 819

What do your spark plugs look like? Do they smell of fuel after an engine run? Is your exhaust blowing soot (well, more than normal)? Does your engine idle smoothly? If not, are both carb cold start circuits closing properly?

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