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Pleasurecraft repower

Old 01-18-2008, 05:57 AM
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Default Pleasurecraft repower

I have a 351 ford Pleasurecraft inboard in my Fish Nautique. Although it runs great it is only 260 hp and the fish is a heavy boat. I would like to go up in hp to the 300-320 range. What are my options for bigger blocks that will still bolt up to that transmission. Laird
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Old 01-18-2008, 09:40 AM
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Default Re: Pleasurecraft repower

FWIW, I don't think you're going to see much difference, performance-wise, with just 40 to 60 additional horsepower. Maybe 2 knots...
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Old 01-18-2008, 01:40 PM
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Default Re: Pleasurecraft repower

I was hoping for another 4-6 mph.
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Old 01-18-2008, 01:59 PM
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Default Re: Pleasurecraft repower

454 GM..if you've got room. Will need new shaft, larger diameter or better material, different prop too. Maybe a 383 Chevy, but thats maybe 30-40 hp more.
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Old 01-18-2008, 02:09 PM
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Default RE: Pleasurecraft repower

oneill469 - 1/18/2008 5:57 AM

I have a 351 ford Pleasurecraft inboard in my Fish Nautique. Although it runs great it is only 260 hp and the fish is a heavy boat. I would like to go up in hp to the 300-320 range. What are my options for bigger blocks that will still bolt up to that transmission. Laird

i did a repower in a fish nautique with a 6.0 mpi 375 hp. same gear same shaft
they had a hose that went to the fuel return and a plug converter
the boat was an absolute rocket holeshot was amazing
top speed depending on fuel and passengers was upper 40's
cruise @ 3400 rpms was high 30's

then we did one on a ski nautique with a 5.7 325 hp mpi
same thing was very fast
and ease of insallation was great . i think it was done in 2 days with all the extra work we did
i would never go back to using a ford in any nautique
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Old 01-18-2008, 02:29 PM
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Default Re: Pleasurecraft repower

Thanks Bigjimmie. That was exactly what I wanted to know. This is why THT is still the best boating site on the web. I was worried about the hole pattern on the block matching up to the tranny.
Who do you think has the best deals on a 6.0 375hp ready to drop in? Laird
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Old 01-18-2008, 03:13 PM
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Default Re: Pleasurecraft repower

I test rode one with the 320hp MPI once, it cruised about 29, topped maybe 33 or so.
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Old 01-18-2008, 03:31 PM
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Default Re: Pleasurecraft repower

I top out just under 30. Cruise is 23-24 at 3000 rpm. Great gas mileage but would like a little more speed. I am adding a 50 gal. fuel tank so the should give me the range I want.....just like to get there a little quicker. Laird
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Old 01-18-2008, 04:03 PM
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Summit Racing has "dressed", blueprinted, marine power-monsters. Pretty good "bang-for-the-buck"!

http://store.summitracing.com/egnsearch.asp?N=700+115+324341&D=324341
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Old 01-18-2008, 04:41 PM
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Default Re: Pleasurecraft repower

You will not see it with the prop/transmission in that boat. if you want new power, check with Indmar. Just my opinion of 28 years of inboard experience. They will offer all kinds of poer options, but speed and direct drive transmissions usually don't collide in the same sentence. Check the site: http://www.indmar.com Mastercraft went from PCM engines to Indmar YEARS ago and was a great move.
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Old 01-18-2008, 07:07 PM
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Default Re: Pleasurecraft repower

I don't understand why the hate for the ford PCM.
That is considered a pretty good engine. Of course the bigger block and the more modern fuel system will yield more HP. I would imagine that fish nautique is a carb motor. So comparing it to the 5.7 with MPI isn't really fair. The last version of the ford PCM used in the nautiques was the GT40. It's the same 351 Windsor block as described here but with higher performance heads and EFI. It produces 310HP and is highly regarded in skiing and wakeboarding circles for it's low end torque and reliability. If you want to be fair compare the 5.7 motor to that one.
I have the GT40 in a ski nautique and that thing is a rocket, as you would expect with a small boat and that much power.

If you could find a GT40, that would be the most direct bolt in, I think.
Also, that particular engine is used a lot by street guys, so there are many performance parts for it. You could replace the heads with higher performance heads and get a new carb and probably more HP. In the 90's the carb version with the GT40 heads got 285 or 290HP. There are other heads which are higher performance, but I don't really know much about them. GT40 actually refers to the heads. These heads were used on mid 90's Ford explorers with the 302 block as well as other applications. Some folks have salvaged those heads and upgraded their engines.
My point is that you may be able to get close to what you want for not much money.
Take the time to research it, it could be well worth it.
Check out correctcraftfan.com, lots of folks on their with much more knowledge than me about the 351W.
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Old 01-18-2008, 07:30 PM
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Everything in ski boat power is based off two things... Torque curve and in the old days of carbed engines, when the secondaries kicked in. (in tournament skiing, the secondaries were always disconnected). With the FI engines today, that's not a problem. Torque curve at 3500-3800 rpm is what they look for.
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Old 01-18-2008, 07:43 PM
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Default Re: Pleasurecraft repower

2005 SeaCraft - 1/18/2008 9:30 PM

Everything in ski boat power is based off two things... Torque curve and in the old days of carbed engines, when the secondaries kicked in. (in tournament skiing, the secondaries were always disconnected). With the FI engines today, that's not a problem. Torque curve at 3500-3800 rpm is what they look for.
Ok fine, I'm sure you know more about engines than I do.
My point was that to compare a 1980's Ford carbed engine to a modern day GM EFI engine isn't fair.
I'm pretty sure the PCM GT40 and the EFI GM 5.7 perform similarly and the ford would probably the most direct hook up. Motor mounts, transmission, etc. Obviously, the other can be done.
Now, if you want to go with a bigger block, fine, but if staying with a small block, the GT40 is something that should be looked into.

Just trying to say there are alternatives and that the ford is a good power plant.
They don't actually make the GT40 any more, but ford did an end of life run and brand new engines can still be had.
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Old 01-18-2008, 07:55 PM
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Default Re: Pleasurecraft repower

chris196 - 1/18/2008 7:43 PM

2005 SeaCraft - 1/18/2008 9:30 PM

Everything in ski boat power is based off two things... Torque curve and in the old days of carbed engines, when the secondaries kicked in. (in tournament skiing, the secondaries were always disconnected). With the FI engines today, that's not a problem. Torque curve at 3500-3800 rpm is what they look for.
Ok fine, I'm sure you know more about engines than I do.
My point was that to compare a 1980's Ford carbed engine to a modern day GM EFI engine isn't fair.
I'm pretty sure the PCM GT40 and the EFI GM 5.7 perform similarly and the ford would probably the most direct hook up. Motor mounts, transmission, etc. Obviously, the other can be done.
Now, if you want to go with a bigger block, fine, but if staying with a small block, the GT40 is something that should be looked into.

Just trying to say there are alternatives and that the ford is a good power plant.
They don't actually make the GT40 any more, but ford did an end of life run and brand new engines can still be had.
gt40 is a very nice engine but initial cost is higher and manifold/riser replacement later is more and finally the hp is lower
it's just that the gm base stuff is cheaper to buy and maintain
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Old 06-24-2008, 09:19 AM
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Default RE: Pleasurecraft repower

bigjimmie, did you have to do any console modifications for the 375? what transmission did you use?
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