1988 Evinrude 150 Lacks Power

[Staydawg]

Hello. I have a 1988 Evinrude vroom xp150hp.

Today [the 1988 Evinrude vroom xp150hp] started right up. [The fuel is] new gasoline. I took off the carburetors and cleaned them.

[The engine] only [accelerated] to about 3500-RPM would even allow to plane-off.

I got to the other side of the lake. I put [the 1988 Evinrude vroom xp150hp in] neutral, then in gear again, and flew across the lake like a vat out of hell--it was admirable.

Then I stopped and filed for a couple hours.

I went to move. [The 1988 Evinrude vroom xp150hp] cranked over,one turn, fired right up, but was not able to get to full power again. I noticed at home later that I have what I think is a lot of fuel-oil mixture running down the outside of the case on the engine but stops.

Any ideas would be very helpful.

Bob

[jimh]

Congratulations on having a 28-year-old outboard engine. It is always good to see older outboard engines still running. It will be difficult to offer much advice on diagnosis of the lack of power in the engine based on your narrative. To begin a basic diagnosis of the engine follow the procedure suggested in

http://continuouswave.com/whaler/refere ... Check.html

Let me ask a few questions:

When you got to the other side of the lake and stopped and filed for a couple of hours, was the engine tilted up?

Does this engine have the automatic oil mixing system or OMS (sometimes called VRO)?