I have a new-to-me 1991 30ft Bayliner Command Bridge with a possible seized 7.4 Gen 4 due to a failed exhaust manifold. The motor original and looks virtually new with a great maintenance history, so I haven't given up total hope that it can't be revived. Mated to the Mercruiser is a relatively new Bravo 2 outdrive that had 20 or 30 hours a year with documented annual maintenance.
I was practically handed a complete nose-to-tail Volvo Penta 8.2GSi (GEN 6 Fuel Injected) and Penta DP-S Duo Prop outdrive that were removed in running condition according to the previous owner, he had crated everything up several years ago and now just wanted to get the space back in his workshed. They are both in what appears to be good shape except the exhaust elbows were shot on the motor. My intent is to verify the 8.2 runs well with appropriate compression checks etc. on the ground and then backfit whatever I need to in order for it to replace the 7.4 Merc. Of course, I need to buy new exhaust manifolds and risers for the Volvo and a few bits and pieces.
My questions are:
1) Should I go with the original Penta Manifold/Riser setup or use the Mercruiser style?
2) Besides some wiring changes to support the fuel injection and electric fuel pump, what else do I need to consider moving from Mercruiser to Penta?
3) Would you switch to the Duo-Prop if you had all this stuff laying around?
Another option is to part out/liquidate the Volvo setup and stick with the 454. What are your thoughts?
Thanks for the help.
I was practically handed a complete nose-to-tail Volvo Penta 8.2GSi (GEN 6 Fuel Injected) and Penta DP-S Duo Prop outdrive that were removed in running condition according to the previous owner, he had crated everything up several years ago and now just wanted to get the space back in his workshed. They are both in what appears to be good shape except the exhaust elbows were shot on the motor. My intent is to verify the 8.2 runs well with appropriate compression checks etc. on the ground and then backfit whatever I need to in order for it to replace the 7.4 Merc. Of course, I need to buy new exhaust manifolds and risers for the Volvo and a few bits and pieces.
My questions are:
1) Should I go with the original Penta Manifold/Riser setup or use the Mercruiser style?
2) Besides some wiring changes to support the fuel injection and electric fuel pump, what else do I need to consider moving from Mercruiser to Penta?
3) Would you switch to the Duo-Prop if you had all this stuff laying around?
Another option is to part out/liquidate the Volvo setup and stick with the 454. What are your thoughts?
Thanks for the help.