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I've never had twins (engines that is) so I can't compare but I do like the room around the single big block when its time for maintenance. I switched to a Bravo III outdrive with the duel props and that was a major performance enhacement. I cruise at 26-27 mph @ 3,150-3,200 rpm and hit 39-40 @ WOT.
The Bravo III takes care of the handling issues around the docks at slow speed. With the counter rotating props I can back up straight and pull forward straight at even idle speed.
Because of the limited beam of the boat I'd opt for the single rather than the twins due to the ease and reduced cost of maintenance. Best wishes which ever way you go. These are great boats and fit a very nice balance between cruising size and trailerability.
Did you mean 4.3's? Did you do anything with the drives (gears/props)?Doesn't appear this threat has been used in awhile. I am doing major overhaul of everything on this boat. Have replaced 4.6 engines that always seemed I was having to push rpm high to maintain plane. They were rebuilt numerous times and replaced several times. I now have twin 350's. With a 9 foot beam it's a bit tight. Any suggestions for placement of a generator. My thoughts were to ditch the water heater for a generator. I have a/c under the booth seating in cabin. I added electric head. Replaced all the deck area wood with starboard as well as the helm seat. The helm is now a bench seat with the flip back.
I have a long way to go before she is wet again but thoroughly enjoying this restoration project. Would enjoy hearing from others who have tackled such a project.
Have you had success replacing 4.3's with 5.7"s? The drive reduction for the 4.3's are 1.81. 5.7's are 1.47.I've done a lot of re-powers on 80's Se Rays. The Alpha's have no problem handling small block V-8's.
I bet the hull will perform fantastically with the new power. Let us know what you think when you run it.
Have you had success replacing 4.3's with 5.7"s? The drive reduction for the 4.3's are 1.81. 5.7's are 1.47.
I wouldn't think adding 3+" of pitch to a 32 year old drive would be wise.