Re: 97 200hp evinrude engine misses HELP
If you don't know what you are doing I would have the cylinder scoped before pulling the head. As a matter of fact, I wouldn't pull it period before I had it scoped. You don't want to take the head off to find that it was a fuel delivery problem in the first place.
I suspect it is a frozen piston or stuck rings, but I would have it scoped first by a trained eye.
In working around cars I have sprayed some Deep Creep in the faulty cylinder before and let it sit up overnight. You can find it at Autozone or even Wal-Mart. It's the stuff made by Sea Foam. You can't hurt in trying. If the piston doesn't move by turning the flyweel at the top of the engine you can try this.
Also, you can try putting about a tablespoon of 2 cycle oil in the faulty cylinder, and then rerun the compression check. If you see the numbers go up then you know it is a ring issue.
Also, if you run a compression check ,and before doing it, look in the spark plug hole with a flashlight, you can notice where the piston is sitting. Run the check, and when you get done recheck the piston to see if it moved. If it moved then you, more than likely, have sheered ring or they may be gone altogether.
Have you ever de-carbed this motor when you go to winterize it?
