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Wellcraft 290 Coastal Re-Power Yamaha F350's

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Wellcraft 290 Coastal Re-Power Yamaha F350's

Old 10-09-2017, 11:30 AM
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Default UPDATE Wellcraft 290 Coastal Re-Power Yamaha F350's

Well the tear down has begun. Just got the 250's and rigging off the boat and spent the day de-rigging the bilges. The generator was just completely re-done by the dealer and looks new again. I removed everything from the Gen compartment while it was at the dealer. Prepping for paint now then re-rigging with new sound barrier, blower & hoses and macerator pump. I'm moving the two 31T AGM Batteries to this compartment and adding two more. The weight distribution is much better having them more forward and low in the hull. Prepping the aft bilge for paint as well so all the new Yamaha rigging will be nice and clean. Gonna be an exciting project and I'm hoping I can finally be finished with my baby. This boat has been absolutely great. My only complaint has been I need more power and more range.I'm pretty sure I'll have both now

The plan is to re-wire the helm as well as repair any gel cracks while she's down for repairs. Anxious to see what kind of fuel numbers I get.

Last edited by BoatHaus; 03-25-2019 at 05:27 AM.
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Old 10-09-2017, 11:32 AM
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Wow sounds great, can't wait to see this unfold.
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Old 10-09-2017, 11:33 AM
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Old 10-09-2017, 11:56 AM
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Old 10-09-2017, 11:56 AM
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Originally Posted by Paisito View Post
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That boat is going to be a totally different animal with those big v8's. Good choice.
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Old 10-09-2017, 12:09 PM
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Looking forward to LOTS of pics!
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Old 10-09-2017, 04:00 PM
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man what a long day, I don't miss this stuff one bit, I'm whooped. I'll shoot some pictures tomorrow
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Old 10-10-2017, 10:40 AM
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Are you refitting a boat or a rocket ship? Isn't max HP for that boat 600? Your boat will certainly go like hell but the problem you'll have is, you probably will not be able to run it that fast to get the better fuel economy.
I have the same boat. I repowered with 300's (going from 225's), I didn't get better fuel economy until it would cruise between 28-30 knots. Fishing the North Atlantic as I do, it's hardly ever smooth enough to do that with that hull design. Real cruising speed in 2-3 footers is 24-25 knots and it makes a big difference in fuel economy. Also when the seas get rougher it's much worse. If I could go faster I would, but there will be nothing left of the boat when I'm though.
Sometimes fishing in my area requires a 70-80 mile run to the canyons. That was right on the edge of my range. It was a concern so I took out the generator and put in a spare tank. Now I'm much more confident about offshore trips.
It's just my opinion but I doubt you're going to need that extra 100 HP.
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Old 10-10-2017, 12:50 PM
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Those 350's are 780 lb each hanging off the back.....
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Old 10-10-2017, 02:23 PM
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Originally Posted by BoatHaus View Post
Well the tear down has begun. Just got the 250's and rigging off the boat and spent the day de-rigging the bilges. The generator was just completely re-done by the dealer and looks new again. I removed everything from the Gen compartment while it was at the dealer. Prepping for paint now then re-rigging with new sound barrier, blower & hoses and macerator pump. I'm moving the two 31T AGM Batteries to this compartment and adding two more. The weight distribution is much better having them more forward and low in the hull. Prepping the aft bilge for paint as well so all the new Yamaha rigging will be nice and clean. Gonna be an exciting project and I'm hoping I can finally be finished with my baby. This boat has been absolutely great. My only complaint has been I need more power and more range.I'm pretty sure I'll have both now

The plan is to re-wire the helm as well as repair any gel cracks while she's down for repairs. Anxious to see what kind of fuel numbers I get.

Thatís awesome but what made you choose F350ís instead of Suke 350ís or Verado 350ís? Iím not sure where you will get your range increase from...
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Old 10-10-2017, 03:46 PM
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This I gota see
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Old 10-10-2017, 03:49 PM
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Old 10-10-2017, 04:24 PM
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Originally Posted by Flying_Norseman View Post
That’s awesome but what made you choose F350’s instead of Suke 350’s or Verado 350’s? I’m not sure where you will get your range increase from...
More torque, faster, and cooler in every way possible. On a heavy boat the f350 wins especially if you like cruising fast to the fishing grounds.
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Old 10-10-2017, 04:46 PM
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I love that you went for the v8s they are going to wake that hull up! Im guessing your plumbing in a manifold for some bladders for that extra range?
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Old 10-10-2017, 04:50 PM
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Originally Posted by houlester View Post
More torque, faster, and cooler in every way possible. On a heavy boat the f350 wins especially if you like cruising fast to the fishing grounds.
More torque than the Suke 350??? No, more torque than the Vrod350? No. But a heck of a lot more weight to be carried by a 29 footer. Donít take me wrong, I have nada against big motors or yammis, I just donít see the physics the OP is out to get. And having a similar boat I am very curious as to how the outcome will be.
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Old 10-10-2017, 05:42 PM
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It's a heavy boat with a 10.5' beam.. it'll do fine with the V8's. Although I'm pretty happy with the performance with F250's!
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Old 10-10-2017, 05:53 PM
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Originally Posted by Flying_Norseman View Post
More torque than the Suke 350??? No, more torque than the Vrod350? No. But a heck of a lot more weight to be carried by a 29 footer. Donít take me wrong, I have nada against big motors or yammis, I just donít see the physics the OP is out to get. And having a similar boat I am very curious as to how the outcome will be.
Intrepid has performance reports on their 327. The twin F350 outperformed them all. A twin f350 Freeman 37 will beat a twin v350 boat. The v350 is more fuel efficient but not as powerful. I donít know anything about the Suzuki but I would put money on the f350s being quicker. As someone else put it thereís no replacement for displacement for pushing heavy boats.
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Old 10-10-2017, 06:20 PM
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Originally Posted by houlester View Post
Intrepid has performance reports on their 327. The twin F350 outperformed them all. A twin f350 Freeman 37 will beat a twin v350 boat. The v350 is more fuel efficient but not as powerful. I donít know anything about the Suzuki but I would put money on the f350s being quicker. As someone else put it thereís no replacement for displacement for pushing heavy boats.
The Suke test proved the opposite, and every test will depending on whoís performing them. However I agree with you on the displacement unless you are looking for range, which is what the OP is after. But weíll see, he is working on it and it sure will be interesting to see the findings of the swap. I for one love to see these real time results, and admire people with balls enough to do what they think is best with what they have.
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Old 10-10-2017, 06:28 PM
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It does have more torque than the Vrod. That's been proven many times. The Zuke we don't know yet. Not enough of the Zukes out there yet to see a comparison.





Originally Posted by Flying_Norseman View Post
More torque than the Suke 350??? No, more torque than the Vrod350? No. But a heck of a lot more weight to be carried by a 29 footer. Donít take me wrong, I have nada against big motors or yammis, I just donít see the physics the OP is out to get. And having a similar boat I am very curious as to how the outcome will be.
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Old 10-10-2017, 07:36 PM
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Originally Posted by Seahawk254 View Post
Are you refitting a boat or a rocket ship? Isn't max HP for that boat 600? Your boat will certainly go like hell but the problem you'll have is, you probably will not be able to run it that fast to get the better fuel economy.
I have the same boat. I repowered with 300's (going from 225's), I didn't get better fuel economy until it would cruise between 28-30 knots. Fishing the North Atlantic as I do, it's hardly ever smooth enough to do that with that hull design. Real cruising speed in 2-3 footers is 24-25 knots and it makes a big difference in fuel economy. Also when the seas get rougher it's much worse. If I could go faster I would, but there will be nothing left of the boat when I'm though.
Sometimes fishing in my area requires a 70-80 mile run to the canyons. That was right on the edge of my range. It was a concern so I took out the generator and put in a spare tank. Now I'm much more confident about offshore trips.
It's just my opinion but I doubt you're going to need that extra 100 HP.
you hit on some real good points. I absolutely love my boat , however it has always needed more power for my use. Everyone who has a 290 they re-powered says how different the boats runs & drives with the extra power. As I'm powered, propped and loaded for the trips we do I can't go less that 27 mph before I fall off plane and the control I have at that speed is almost none. My thought is with the added torque, hp and weight I will get the bow up and have enough juice to drive as slow as needed when it gets rough and have enough power to easily muscle thru it slow and strong. The 2900 Century express gets 1.4 at cruise loaded half way with the same beam, LOA and weight. I think my 290 is a more efficent hull and I'm hoping for 1.5 loaded at cruise while having more control.
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