23 IB - Anyone Running a Diesel?

[deepsushi]

a couple of members have yanmar 230/240s 4 cylinders in their inboards (osead23 and highway12). One member has a 315 6 cylinder as well. I have seen boats with cummins 6btas and volvo 40 series as well.
The yanmar 4 is a direct replacement for the gas motors as you dont need to upgrade the shaft size to handle the torque. The diesel upgrade increases cruise speed to 25/27 knots vs 21/22 in gas powered inboards.

The yanmars arent available new anymore and the used ones are hard to find and usually fetch a high price. Yanmar is due to release a new 4lv series next year which will be a great option as they are common rail diesels in both 230 k and 250 hp.

[cc]

I have a 28' boat with a 315 hp, 6 cylinder yanmar pushing. I love it! It is so smooth, very quiet, a responds quickly. I get a tad over 3.2 statue miles per gallon running at 28 mph. Top end is 40mph. I have 400 hours on it. We also have a 1965 seacraft 19 bow rider Dad bought new. Thought about repowering it with a yanmar 4 cyl, but the original mercruiser runs so well. I can't say enough good about the yanmar.

[dginge]

I have a 23 sceptre with a 260 yanmar. 6 cylinder. I hold 76 gallons and could make it to Cuba on a tank. Ha. I love it. It's my favorite seacraft yet. It's a 1979 and has a bravo 3 IO. I have 330 hours on it and it was installed in 2001. I cruise at 31 mph and top out at 3800 Rpms and get 42-46 mph depending on load. I think it may be my forever boat but I've said that at least 6 times.

[John3325]

Thanks guys, great info so far. I do work for a boat salvage company so maybe I can put them on alert for a 4 cylinder/6 cylinder yanmar used.

They can't be much sluggish than it is now, top end of 40 mph sounds great to me for that hull.