- Nov 12, 2006
- 5,334
- Boat Info
- 1999 Sea Ray 330DA
Twin 7.4 MPI (310 propshaft HP) V-drives
- Engines
- Twin Mercury Marine marinized 7.4L L-29 V8s
Cast iron block w 4-bolt mains
Glad you had a good trip. However, 3900 is pushing the engines, just a bit hard. WOT is (if I remember correctly 4200-4600 RPM. If you can turn 4600 at WOT, then 3900 is 85% of WOT, a little high to get good life from a gasser. If WOT turns 4200, then 3900 is 93%, which is grossly high. You need to dial it back.
Best regards,
Frank
Best regards,
Frank