Re: OMC at 3000 rpms max.
Yep, follow dieselwalt's advise. Keep it simple, do the basics first. I believe you can load it down on the muffs by putting it in gear, trim down, and increase the RPM until it approaches, say, 4K. If you have some throttle left, note it. You'll never load it down in the driveway like in the water but if you have something left at 4K, you might be alright. But like dieselwalt said, give it a good tune-up first, check compression (listen, if you pull all the plugs at one time, you have to ground the coil wire. Be very careful, though, because if you don't ground that coil wire, you can cause a spark and ignite the vapors in your engine well and make for a very unpleasent afternoon)and as previously stated, anything above 100psi is good, and all within 15-25% of each other. If one is, say, 108 psi, and another is 118 psi, that's OK because the average is 113 psi. If one were 80-90 and less, then there's a problem. It won't be, though, because I'll bet you a seafood platter your problem will be simpler than a loss of compression.
