1986 Bayliner 28'. New 260a. Every thing that can be new is new. Switched from old style distributor to Mallory electronic. New wires, plugs and Carb. (Third carb actually.) New manifolds and risers. Timed perfect, no vacume leaks. No fuel restriction problems. idles perfect. Runs well at low speeds. No oil problems, compression checks out great.
Problem is no RPMs under load. The prop is exactly what the manufacture suggests.15"L 19 pitch No dings no chunks missing no nuttin. RPM gauge has been checked and is accurate. The bottom is cleaned monthly.
The boat is turning 3000rps at wot. I have had this problem almost nine months now and have had a marine mechanic do several different things to try and fix the problem, zero luck.
When in gear and moving at a decent speed there is a slight vibration. There is no slipping, no noise.
Could this be an out drive problem? I would think there would be some indication of a bad outdrive. I am more than willing to pull the boat out of the water but hate to if there is no chance of the out drive being the problem.
This is driving me crazy, please help.:%
This is a Volvo Penta OD.
Problem is no RPMs under load. The prop is exactly what the manufacture suggests.15"L 19 pitch No dings no chunks missing no nuttin. RPM gauge has been checked and is accurate. The bottom is cleaned monthly.
The boat is turning 3000rps at wot. I have had this problem almost nine months now and have had a marine mechanic do several different things to try and fix the problem, zero luck.
When in gear and moving at a decent speed there is a slight vibration. There is no slipping, no noise.
Could this be an out drive problem? I would think there would be some indication of a bad outdrive. I am more than willing to pull the boat out of the water but hate to if there is no chance of the out drive being the problem.
This is driving me crazy, please help.:%
This is a Volvo Penta OD.