charlg
New Member
- Jan 7, 2007
- 745
- Boat Info
- 2000 280 Sun Sport
/ Raymarine C80 w/ Radar / Sirius weather
/ SH GX5000S VHF
- Engines
- Twin 350 Mags / B1's
/ Corsa exhaust
Dropped the boat in the water and noticed a slight vibration, not a skip, at 1300 RPMs while underway. Got to the dock and one at a time put each motor in neutral and increased RPMs to 1300 and the vibration (felt through the floor) only existed from the port motor. Only changes in the spring were new plugs, wires, cap, and rotor.
Had my mechanic come back and he replaced the new cap and rotor. He said he was getting shocked when he touched the side of the cap. That didn't work. He checked the firing order, and said it was right. Then he started removing the new plugs with only 2 hours on them. 7 out of 8 were completely black, not wet, except for 1. 1 looked brand new. He also did a compression check on some of the cylinders and they were +/- 150. Nothing helped.
Also, at WOT port motor will only go to 2500 RPMs with drives down. Last 2 years this motor would only get to 3500 RPMs (no one can figure that out). If you trim the outdrive very slightly, RPMs will increase, but props don't seem to bite.
If I have to go another year with problems, I'm going to have to get out of this boat.
Had my mechanic come back and he replaced the new cap and rotor. He said he was getting shocked when he touched the side of the cap. That didn't work. He checked the firing order, and said it was right. Then he started removing the new plugs with only 2 hours on them. 7 out of 8 were completely black, not wet, except for 1. 1 looked brand new. He also did a compression check on some of the cylinders and they were +/- 150. Nothing helped.
Also, at WOT port motor will only go to 2500 RPMs with drives down. Last 2 years this motor would only get to 3500 RPMs (no one can figure that out). If you trim the outdrive very slightly, RPMs will increase, but props don't seem to bite.
If I have to go another year with problems, I'm going to have to get out of this boat.