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Old 26-01-2020, 13:24   #16
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Re: Repowering a bristol 40

Looks like there is a slightly newer Bristol 35 in your area that already has a rebuilt Yanmar and would be less money than paying to repower the 40.

https://annapolis.craigslist.org/boa...045671724.html

Just a thought.


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Old 26-01-2020, 13:48   #17
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Re: Repowering a bristol 40

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Originally Posted by MarkSF View Post
Where has the engine that was in it gone? Is it practical to rebuild it?
The engine and transmission was removed by the current owner.
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Old 26-01-2020, 13:54   #18
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Re: Repowering a bristol 40

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Originally Posted by boat_alexandra View Post
sounds like a nice boat, it would be a shame to spoil it with an engine.

https://kellycontroller.com/shop/mars-0913/
How much would an electric motor be?

I'm not good enough of a sailor to have a boat this size without an engine in the Chesapeake with its narrow channels and ubiquitous shoals.
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Old 26-01-2020, 13:59   #19
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Re: Repowering a bristol 40

The seller is prepared to reduce the price to $6,000 if anyone's interested. It's beyond my budget. That Bristol 35 looks good, and I'm still smitten by Deborah Lee.
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Old 26-01-2020, 14:33   #20
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Re: Repowering a bristol 40

Damn those are pretty boats. If you wanted to avoid the re-power - here's one already equipped, and about the same net cost. I'm talking myself into buying one after seeing these photos-


https://www.yachtworld.com/boats/198...ol-40-3077555/
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Old 26-01-2020, 15:01   #21
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Re: Repowering a bristol 40

As suggested earlier, would consider re-powering with 38 hp, definitely more than 30hp...I have 30 hp westerbeke in my 35.5, that moves it along smartly in calm and choppy seas, but I am 16,000 pounds. I have original diesel that was rebuilt once in late 1990s. Cant recall the displacement of the 40, maybe 20,000 pounds or so? Excellent boats, built to last. You have good taste.
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Old 26-01-2020, 15:24   #22
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Re: Repowering a bristol 40

Cheapo sometimes is a good way to go. A Ford tractor motor is the same engine as their marine diesel, and there are many of them around for sale fully reconditioned. You will need a marine gearbox and a heat exchanger and water pump">raw water pump, and unless you wish to run a dry exhaust you will need to install a water-cooled exhaust manifold and the excess sea water from the heat exchanger will be fed into the exhaust stream gasses just abaft the engine manifold elbow and facing downwards--which you may have to have made up..

I think you could do it for maybe ten grand--assuming you have a suitable marine gearbox such as a Paragon, and the shaft and propeller are still there.
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Old 26-01-2020, 15:32   #23
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Re: Repowering a bristol 40

Brendan:

You said: "The seller is prepared to reduce the price to $6,000 if anyone's interested. It's beyond my budget."

Does that mean that a $6K boat plus a $20K engine replacement is beyond your budget?

If so,

1) I salute you for knowing your limits,

and

2) I warn you that here in the Salish Sea (Puget Sound in Washington State and Straits of Georgia In British Columbia) the ANNUAL upkeep of 40 footer will be a minimum of $12K. I should think it would be as much in the Chesapeake!

Most people can find the money to BUY a boat, far more than can find the money to KEEP a boat.

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Old 26-01-2020, 16:23   #24
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Re: Repowering a bristol 40

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Originally Posted by TrentePieds View Post

Most people can find the money to BUY a boat, far more than can find the money to KEEP a boat.

TrentePieds

That's the real crux of things, right there. Unless you can keep it on a trailer, or own a pier - you have to count on shelling out money every month ad infinitum. You really need to enjoy it.
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Old 26-01-2020, 19:33   #25
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Re: Repowering a bristol 40

I stand corrected...Bristol 40 doesnít displace much more than my 35.5, at about 18,000 pounds and its beam is about 2 inches narrower, so would think the 30 hp diesel should work...
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Old 26-01-2020, 20:12   #26
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Re: Repowering a bristol 40

I have a Bristol32 with a rebuilt Atomic4 gas engine . Perhaps we can make a deal? Boat is in Bokeelia, Florida now. I can transport the unit with my van.
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Old 26-01-2020, 20:21   #27
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Re: Repowering a bristol 40

That boat is in Wilmington, NC.
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Old 26-01-2020, 20:30   #28
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Re: Repowering a bristol 40

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Originally Posted by ob44 View Post
I am in the process of repowering my Tartan 40. It had a Universal 50 (Kaboda) that was actually a 44 hp diesel. I am repowering with a Beta 38 hp. All research indicates the 38 is plenty of hp. The engine was $11k and change. Total labor will be around $9k.


I bet youíre right. I repowered my T40 with a Beta 50- a bit overpowered which allows me to deliberately prop to get 7+ knots at 1800-1900 rpm so very quiet. But I bet the 38 is plenty especially on a boat that sails as well as a T40. Send me a PM and let me know how it goes
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Old 26-01-2020, 21:01   #29
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Re: Repowering a bristol 40

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Originally Posted by brendanwalls View Post
Can anyone suggest a guestimate of how much it might cost to put another 30hp+ diesel inboard?

Thanks for suggestions.

Brendan
Depending upon your style of sailing, you may wish to also consider an Atomic 4 engine. If you are just day sailing and only use your engine for an hour or two at a time with little to no motoring for hours on end, the petrol engine might be the better choice. Diesels tend to do better when run consistently for longer periods.

If however you tend to run the diesel so that it has a chance to warm up, run it under a load for a while, and blow any gunk out of it, then the diesel will likely be the better choice. If you decide upon putting in a new or used diesel, I am a big fan of BetaMarine. There are also sites that sell used engines with a service and guarantee.

I wish you good luck in whatever your choice is.
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Old 26-01-2020, 21:54   #30
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Re: Repowering a bristol 40

Keep in mind that the Atomic 30 had an integral transmission and was probably shorter than a typical engine with bolt on transmission. Putting in a new diesel may require an engine space modification. Most engine spaces are sized for the engine that the mfr was putting in the boat so they could maximize the interior space. Diesel engines may require a larger diameter prop shaft due to more torque and also a new prop.

Tread carefully - lots of gotchas in converting to diesel.
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