That unit usually runs about 155 pounds compression in a new motor. They run extremely well with a single carb. It was the fastest 25hp motor built in 1984 when they first arrived in the US.
I wouldn't worry about the compression just yet. Have the carb cleaned, and by cleaned, I mean by a professional, not a rinse and a promise. I use an ultrasound parts cleaner to soak the carb body and jets. After removing from the cleaner, I hose the carb down with water, then blow it dry with compressed air. There are a few trick to cleaning the carb correctly and have the engine running smooth after doing so. Those are tough little motors. The output can be bumped a little, not a lot of gain by spending tons of money. It's only 26.3 cubic inches.
D
|