- May 14, 2008
- 3,541
- Boat Info
- 1988 390 EC
- Engines
- 454 Mercruiser Gassers
Same problems here. I just changed the long overdue plugs, rotors and caps and still have the same problem. It is really pointing towards fuel. Runs like a champ up to 1,100 RPM, then bogs down. Timing is good @ 8* BTDC. Exactly how does one check the fuel pump pressure and what should it be? Do you remove the outflow tubing from the fuel pump and put some kind of gauge on it?