Came across a Dory with a Mariner outboard and it's powered by LPG. A GRP box at the backend houses the tank, probably eqivalent to 4 or maybe 5 gallons. I imagine the tank can be removed for refuelling. There is a GRP 'blister on the side of the outboard, I assume something to do with the conversion. Not knowing anything about LPG my questions are:
1) What sort of cost would the conversion be?
2)What would the running costs be compared to petrol, LPG is still a lot cheaper, but how would consumption compare?
3) There was also a conventional petrol tank in the boat with fuel line. Can the out board still run on petrol as well?