Have a mysterious power loss on my new engine overhaul. It has run fine
until two days ago. Now it won't pull your hat off your head.

Engine runs fine. Starts easy, idle smoothly, runs smoothly at any rpm it
is capable of turning. There is no spitting, missing or backfire. Just
doesn't develop power to accelerate. Going up hill it just gets slower and
slower and slower, the rpm will drop to about 1500. Top speef is about 55
mph. I han't checked the timing yet, but thats next.

Suggestions???

John