mercury blue band 50

[bigmike35]

looking for a power head for above in good working order any 1 help?

[Nos4r2]

Damn, I guess that 75psi on the bottom cylinder was terminal then?

[ADS]

Try Bill higham marine, they seem to carry alot of spares:

http://www.billhigham.co.uk

[Pete7]

Mike, thats an old engine. Before you decide to replace the power head consider replacing the complete engine. I think the blue band engines were rated at the power head not at the gearbox like later engines, so a more modern engine of say 40 hp would provide a similar power output. Bill Highman will want quite a bit of cash for a powerhead and it will still be an old engine. If you bought something like a mariner 40 hp engine that was running properly and could be heard before buying it might be a better buy. You could then offset the cost by selling your gearbox on boats and outboards. A 2 cylinder Mariner 40 whilst a little lumpy at tickover is a much simplier engine and pretty bomb proof, we have a pair of them in the diving club and they just work year in year out.

Something like this could be interesting, but you would need to check the transom height of your boat. It will be designed for either 15" (short shaft) or 20" (long shaft) engine.

http://www.boatsandoutboards.com/view/F89332/

Pete

[ADS]

Have to agree with Pete, whilst the blue bands are good engines, they are getting on abit and it probably wouldn't be economical to replace the power head. I am also a fan of the 40HP Mariner and as Pete says they are quite indestructable, I believe they are of Yamaha origins, and would probably be my choice for an SR4. And yes I do have one for sale http://www.boatsandoutboards.co.uk/view/F87628
Although the one Pete has pointed out seems a good deal. Incidently, the 40HP Mariner I have is smoother at idle than my 40HP Suzuki, both of which are 2cyliner 2 strokes, 40HPs.

regards

Alex