Losing power

[Captain_Kirk]

I sure hope someone can help. I have an '85 50hp. Force. It runs just fine for the most part(smooth&starts fine) but the last few seasons I've lost 15-25% of normal hp. I usually have. It doesn't have a huge number of hours on it so I'm fairly sure it's not cylinder wear. Any ideas?

 

[steelespike]

Re: Losing power

Start with a compression check.Ideal would be at least 100 psi and within 10% between cylinders.Check that throttle is opening comepletely.
Have you changed the plugs annually?Changed the gear lube?