Geoffrey Wallington
Member
Thanks. I think he makes sense as well.
Replacement engine turned around to work with a V-drive?
- Thread starter Geoffrey Wallington
- Start date
Jus the two of us
Active Member
- Dec 7, 2015
- 296
- Boat Info
- 1998 Sundancer 450
2009 Sundancer 55
- Engines
- 3116 Cats
MAN 900
I would be looking for another mechanic, Thats about the craziest thing I have heard of.
- Apr 26, 2009
- 5,820
- Boat Info
- '97 330 Sundancer, Raymarine C80 suite with radar, Mercury 310 Hypalon w/8hp Yammie 2stk
- Engines
- 2X 454 carbs w/ vDrives
You may want to clarify that you mean not going to small blocks. I assume you agree that mismatched engines makes no sense. His guy is recommending it.
Jus the two of us
Active Member
- Dec 7, 2015
- 296
- Boat Info
- 1998 Sundancer 450
2009 Sundancer 55
- Engines
- 3116 Cats
MAN 900
Do you know how much engineering would have to be done to set a engine in backwards, and that the transmission follows the rear of the motor. Just sayin.
Geoffrey Wallington
Member
Ya, I had it explained to me. The rear of the motor is still left hand turning so no issues with transmission. I spoke with a guy who has a 380 and said the same thing happened to him. He had to replace a 454 and couldn't find one during COVID. So the same mechanic did his work and put in a 496. Says he can't tell the difference, except that the newer bigger engine is more fuel efficient. He watched them install it and said it mated with mounts and transmission easily. idle and slow speed no difference. Only over around 18 knots is there a slight difference in engine sync, which he says equates to a fraction of an inch difference in throttle position to maintain the engine sync needle in the middle. Hardly even notices anymore after putting 200 hours on the boat since the swap out.
bone354
Active Member
https://www.perfprotech.com/new-lon...enta-gm-mercruiser-and-crusader/category/2575
Has new 454 Long blocks.
Has new 454 Long blocks.
Chris-380
Well-Known Member
here is “note 1” from the link, interesting
https://www.perfprotech.com/blog/tech-articles/454-496-repower
Geoffrey Wallington
Member
Still not a complete engine. ECM may be hard to find. Other bits too. We have decided to get the 8.1L. We are going to take advantage of insurance company generosity. May get the stbd one changed next year. Will have two new engines in it then, and resale value should reflect that.
