NOT a spun prop...

jonscott

Cadet
Joined
Mar 18, 2009
Messages
26
Ok, this motor is a 1992 9.9 Evinrude. I thought the prop was spun but after doing the test, it is not.

At WOT i seem to be getting only half power, the boat won't plane anymore. It does not go as fast as it did. I cleaned the carb when I got the motor and it ran great for a while, after some other tweaks, such as a new head gasket.

What could the problem be? the fuel lines are all original. Could it be something to do with the alcohol in the gasoline now?
 

Rick.

Captain
Joined
Jul 30, 2006
Messages
3,740
Re: NOT a spun prop...

It could be but how is your spark after the engine is nice and warm? Have you got a spark tester? You may be running on one cylinder due to a bad coil. That would explain the lack of power. Best of luck. Rick.
 
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