1988 48 hatteras convertible repower

[hoodie55]

Hello I have a 1988 48 hatt convertible I am looking at repowering the engines I have been thinking about using are the volvo d13 800 hp scania di13 in 800hp and the nanni n13 cr3 800hp would like everyone's opinions on these engines or if some one has repowered a 48 in the past there expertise. Thank you

[Boatsb]

What options will fit best. Length can be the issue. Also down angle and height.

Get a good dealer who can make it work. It's not a simple job.

[Captain Ralph]

Like Jim had mentioned, Cat 3406s would be something to look for.

I luv that beast and it will make the horsepower you were looking for in post #1.
It is tall and with on end H/E,, long.

I always wanted to replace my 12V71TIs with the 3406E.
20 years later, our 12s are still BZ and hard to justify their replacement.

[captcrunch]

The qsm 11 if propped right and I believe burns 21gph or less per engine is good.

[jap201]

As mentioned, due to the exhaust manifold issues, you really can't use all of the 700hp. I think the safe rating is around 400 (450?)'sh hp out of that block due to warping of the exhaust manifold. I love cummins, but go to boatdiesel and do some reading on that particular engine. Listen to what Tony Athens says.

The cat's might be a better option for your boat.

Hopefully Bob chimes back in here on the 700hp qsm, he's done plenty of research on the qsm's

[hoodie55]

I would gladly go with the cat 3406E does anyone know who would have them laying around also thought about the c15

[Captain Ralph]

A lil town of Green Cove Springs FL has a Scania dealer.
Their around.

[Bob Bradley]

Hello I have a 1988 48 hatt convertible I am looking at repowering the engines I have been thinking about using are the volvo d13 800 hp scania di13 in 800hp and the nanni n13 cr3 800hp would like everyone's opinions on these engines or if some one has repowered a 48 in the past there expertise. Thank you

I looked at the Scania motors in 2019 when I was considering repowering my '79 43C. I was just sick of dealing with the 435hp DD 6v92ta engines. I can't recall which model I was looking at but they were well under 800hp. Sticker shock got me boat shopping instead. IIRC, back then the total job (engines, gears, shaft replacement, and ER work) had the job north of $250k. My shopping landed me in a 1986 45C with Cummins QSM11s at 535hp. I'm very pleased with the decision to buy one already repowered. I'm now cruising effortlessly in the 21kt range and I top out around 29kts. At 21 my fuel burn is around 35gph combined. Big improvement on the 42gph at 17kts in the old boat. The Scanias did come very highly recommended by my DD guru here in CT. He likely has over 50 years experience on Detroits by the way.

[motoryacht lover]

I would not go with Volvo. I have a friend that is a Volvo dealer and they are very difficult to work with and the parts are very expensive. Last spring I was in a shop that was a Scania dealer as well as Cummins and MAN and I asked what he thought about the scanias and he said parts availability was an issue and this was last spring (well past covid).

[Pascal]

I would prefer something with better parts availability and service. I ve heard good things about Scanias but they re not “mainstream” enough unless you have a reputable dealer nearby. Volvos are good but parts and service are a little mor expensive and harder to get

Doesn’t Cummins have something in the 700hp range? Their factory remans are fantastic value. Cat also has a factory reman program now. Worth looking into

Nowadays with chain supply issues domestic engines are a plus, assuming they haven’t outsourced. Last year we waited 4 months for an 16V2000 MTU crankshaft for the boat I run. It turned out it was made in India, shipped to Germany for inspection before arriving here.