Re-power recomendations?

[Sleigher1]

Hi Charley,
Nice to hear that you are enjoying the boat.
The D-6 is too big. Weighs a lot more and is just large.
The D-4 will fit but it weighs more as well. You can get more HP, I think it is up to 260 but that might be with extra stuff like a supercharger. If it were me I would not want to go beyond turbo and aftercooler.
I am pretty sure that the Yanmar 6LPA-STP will fit in the box. It puts out max 315 HP with a continuous rating of 255.
Another option is the Cummins/Mercruiser 4.2 EI 250. It will fit and it tops out at 250 HP.
A couple of the guys put the 4 cyl yanmar (240 horse)in a Blackman with direct drive and had excellent results.
You have issues to contend with when going up in HP.
Prop size- you don't have much room to swing a bigger prop but you can add pitch.
Shaft size- you may or may not be able to use the same shaft.
Handling- Being a direct drive it will handle differently than the I/O s like Honeygirl. Of course just because you have the HP doesn't mean you have to use it.
I always wanted to put a Cummins 5.9 in her but it would have been a very tight fit. Mostly length wise.
Anyway you look at it: it will be costly. I chose to simply enjoy my time on the water and not worry so much about getting anywhere fast.
I'm assuming/hoping that the 41A has been good to you and if you are good to it she will last a long time before getting tired. I really think it was one of the best Volvo's of that size. If nothing else just bump it a few hundred more RPMs. If it finally gives up the ghost then the decision to re-power will be a lot easier.
I lost your address but if you'd like all the dimensions for the different motors email me your address and I'll mail you my "re-power" file.
Also, if you do decide to do something you should contact Tony Athens at Seaboard Marine. He does a lot of repowers.

Peter

[sharkwaters]

Charley. I used a Yanmar 240, 4LHA-STP 5 years ago. My boat is a straight shaft like yours. Unless you want to redo the entire drive line, try to find a 4LHa-STP quick. Boatswain locker may have a few left in stock. Going with 300 hp will require new shaft, strut, prop, exhaust and mounts. Its a job you need to pick the shop carefully. Using the Yanmar, I was able to use the existing shaft, prop and strut. I had to make new mounts and exhaust. I used a muffler to act as a water break which prevents water from running up the exhaust into the turbo. From what I have read, the new BMW/Yanmar is taller than the Yanmar. Height was a close call on my job, but it all worked out. I used a 1.5:1 reduction and 18" X 18" prop. Cruise is 18.5 kts. Russ used a 2.0:1 reduction and gets more at cruise. Using a 2.0:1 reduction will require a 1.5" shaft versus the 1.25" you probally have. Its a lot to ponder. Good luck.
Bob

[Laura Mei]

Thanks Peter. I appreciate the advice. I will email my address and look forward to your "re-power" file. Thanks
Charley

[IRish Wake]

Charley,is it an Outerbanks or a Billfisher you're doing? Perhaps the outerbnks version can handle 300hp.There's a interesting article in the Oct.Western Outdoors comparing the blackman to 2 other pilot house rigs by Capt.Mark Wisch.If you like,I can fax or mail it to you.The Outer Banks handels differently then Billfisher.Blackman charged me 20,900 for engine with outdrive and installation in Aug.2000.Believe me the 212hp runs the boat to the level of being scary. kevin

[Laura Mei]

Kevin
My boat is an Outerbanks 26 - direct drive. I did read the article- real interesting. What I hope to gain with a re-power is the ability to cruise at around 18-20 knots on relatively calm seas. Where I live in Long Beach if I can get to Catalina in one hour that is perfect. Anyway I appreciate everyone's advice. Charley

[IRish Wake]

Charley,real good.Just wanted to know you had the right info,good boating. kevin