outboard well positioning, pro's and cons

[kevink 6771]

Hi,
I'm about to start restoring a Rossiter Pintail 24ft Tri Keel, and am Pondering on engines.
Apparently they used to be fitted with a 20 - 25hp inboard, but unfortuantly i comes with a space where the engine should go
I currently have a 35hp johnson 2 stroke longshaft which i've recently serviced for a little speedboat.
So my thoughts are to fit this into a well on the Pintail,although i know its a little bit powerfull for the boat, i'm expecting not to need to rev it as much.
Now i know usually the well sits near the stern, but as i have a space at the front of the cockpit where the step is (where the inboard sat) i thought i could fit a well there, it should be protected by the center keel.
Any advise would be great
kev

 

[alahol2]

I suspect the main problem to overcome will be how to prevent the exhaust gasses from filling the well and choking the engine. I think it is often the mid-leg exhaust relief which needs to be sorted.
The engine you have is probably intended for a fast/planing boat so it won't be ideal for pushing a heavy cruiser. It will work, just not very efficiently.

 

[Tranona]

Hi,
I'm about to start restoring a Rossiter Pintail 24ft Tri Keel, and am Pondering on engines.
Apparently they used to be fitted with a 20 - 25hp inboard, but unfortuantly i comes with a space where the engine should go
I currently have a 35hp johnson 2 stroke longshaft which i've recently serviced for a little speedboat.
So my thoughts are to fit this into a well on the Pintail,although i know its a little bit powerfull for the boat, i'm expecting not to need to rev it as much.
Now i know usually the well sits near the stern, but as i have a space at the front of the cockpit where the step is (where the inboard sat) i thought i could fit a well there, it should be protected by the center keel.
Any advise would be great
kev

This engine is totally unsuitable for a 24 ft sailing boat (which as I said in reply to your other post is almost certainly not a Pintail, but from your description almost certainly a Gypsy). The engine fitted would normally be a diesel of between 10 and 20 hp, commonly either a SABB or a Stuart Sole driving a conventional shaft and prop. If the engine you have is no good or if you don't have an engine, then choices are fit another one, either secondhand of a similar type or new, or use an outboard of around 8-10hp on a bracket on the stern. Trying to put a well where you are suggesting would require the removal of the main structural member of the hull. You could possibly put a well in one of the stern quarters, but this would need major surgery to build a bulkead capable of taking the thrust and making the well watertight from the rest of the boat. As already mentioned a potential problem with wells is exhaust fumes plus significant extra drag unless you are able to lift the engine when not in use - which you can on a transom bracket.