Is the bell housing aluminum
or cast iron? More important is why did it have cracks in the first place? Can't think of too many things that might cause cracks in it other than possibly wrapping the prop at full power, improper initial installation
, or some clown tightening the bolts on it when it wasn't properly seated or aligned.
If it's aluminum
welding is no problem as long as it isn't deformed.
Cast iron is another story, not too many welding outfits these days know how to properly weld cast iron and those that do charge accordingly. Cast has to be pre-heated in an oven
, welded then put back in a high temp oven
to sit over 24 to 48 hours and slowly come back down to temp. Otherwise it just produces more cracks. Probably cheaper to replace it if it's cast iron.
There are a number of companies that make plastic tanks
in all shapes and sizes, even some that will make custom shapes, I'd stay away from aluminum or stainless tanks
, they can get pocket corrosion
if they sit in the bottom of a boat where there will be water
underneath. Usually once you've picked out a spot on your boat to mount it you can find a pre-made tank that will fit your needs with a little custom work to support it. Try to mount one as close to the head as possible and don't go cheap
the vent, use as large a vent fitting as possible to keep odors under control.
The one in my current
boat is made from fiberglass
and was formed right into the hull
by using some of the stringers and runners near the engine
compartment, it doesn't leak but I feel it will eventually need to be re-sealed or lined with a bladder.