Sealine S42 centre fuel tank

[Elessar]

Yes, I think it was the outdrives that cooked themselves under sustained load.
There’s still a few out there: Sealine S41 For Sale | Norfolk Yacht Agency | NYB123971
Fine for use on the Norfolk Broads or Windermere

I bought one of the engines from sealine for £8k dyno tested 60 hours. I put it in my Bayliner.

The problem was the installation but you can’t blame sealine they were following Mercruiser instructions.

The diesel needed more cooling water than the leg could supply. Mercruiser sold a blanking plug and you just fitted a regular seacock and strainer.

The leg now had no cooling water flowing through it and it was on the edge anyway.

I blew a leg up after a 100 miles on the plane. Leg mostly out of the water and red hot. I stopped in a hurry and the leg is plunged into cold water.

About a mile later the leg locked solid and snapped the drive shaft.

I was told by a true expert on this that the sudden cooling causes tiny damage to the mated teeth and next time those teeth mate again, its game over.

New leg, and a Y piece fitted to cool the leg and the engine. I also fitted a drive shower. It gave me 1000s of faultless miles after that.

 

[Elessar]

Bravo “X” drives came out later, but probably too late for the S41.

Too late because of the reputation. They should have been fine!

 

[Elessar]

Ah OK. If it wasjust the drives then surely a cheaper solution would be to retain the Yanmar and fit an uprated outdrive...? Memory hazy on this TBH.

There were no other legs available apart from Volvo.
Best choice would have been a bravo 2. Swing big single props and were simpler therefore more robust. Felt a bit more shaft like to manoeuvre too as they are big enough to have prop walk.

 

[Sticky Fingers]

So what did Sealine replace the Yanmar with?

 

[Elessar]

So what did Sealine replace the Yanmar with?

Volvo I presume. But don’t know.

 

[Sticky Fingers]

I can’t remember and there’s nothing online I can find. Still a few around with the Yanmar as noted above.

 

[Shifty]

I can’t remember and there’s nothing online I can find. Still a few around with the Yanmar as noted above.

I had a 43 with 74p’s on v drives, excellent boat that I did 1000+ hours, however my friend had early 41 and from my hazy memory I thought they just changed the legs not the engines.

 

[Sticky Fingers]

Changed the leg for what? And if so why would there be ex-Sealine Yanmar engines for sale?

 

[Shifty]

Probably my memory failing me, not for the first time! However I do seem to recall they were told by Sealine that the Yamar’s were producing to much torque for the legs to handle.

 

[Sticky Fingers]

Probably my memory failing me, not for the first time! However I do seem to recall they were told by Sealine that the Yamar’s were producing to much torque for the legs to handle.

Yes that’s right. But no alternative leg available to take the torque. So IIRC the whole package was changed out. But I can’t recall the exact details.

 

[Elessar]

Yes that’s right. But no alternative leg available to take the torque. So IIRC the whole package was changed out. But I can’t recall the exact details.

Afaik they sold 8 engines. So 4 boats. The engine was much nicer than the 4 litre sized Volvo at the time. Leg options are as above.