Re: John Welsfords Sundowner
Its comewhat conjecture on my part John, but there are a couple of points that suggest what the issue may have been. I'd drawn the engine compartment with full height back and sides with screw ports in them for access, with a half height bulkhead across the front of the engine just below the height of the crank handle and the capacity to hold a lot of fuel, lubricating oil or water without it getting any further into the boat. It was built though with an eye to improving access which meant no solid sides.
The tank was held well fore and aft, but although well held with webbing straps ( it was an unbaffled polyethylene tank from Vetus Marine) I suspect that it worked the straps loose and moved sideways enough to damage the seal between the fill or feed lines and the tank. The spilt fuel appeared in the galley area first which suggests that it had run along the top of the bunk and into the galley which indicates to me that the spill came from the top of the tank supporting that thought.
It was that the boat became very slippery inside with diesel everywhere that caused the skipper to turn back.
John Welsford

Originally Posted by
John B
Was there any feedback on the tank failure John? I ask because I learnt something I should have known about any boat tanks the other day and it might be a factor ( or not ).
An expert is but a beginner with experience.