David Runk
Recruit
- Joined
- Jun 19, 2003
- Messages
- 3
The problem started quite suddenly. I took the boat (1988 24' Crestliner Saber with OMC 5.0L 2 barrel model 502APRGDP) out a couple of times for several hours with no problem. Third trip, however, I noticed that at WOT the engine rpms woild fall and then rise again to normal (a surge). The boat, otherwise, runs fines at all but the top end of the throttle. I initially thought maybe bad gas. I treated the fuel, replaced the water seperator and cleaned the in carb filter, and put 35 gallons of fuel in the 52 gal. tank. The dwell is correct and spark plugs look good and are gapped correctly. One strange thing I've noticed is that when running at or near full throttle the engine will also lose power if I engage the trim motor, either up or down. My next thought is a faulty coil. I'm running out of ideas and my troubleshooting skills just about exhausted. Any ideas? Also, are marine coils and automotive coils interchangable?<br />Thanks