When I was working for a municipal police department, we had a two FORD Crown Vics delivered with Compress Natural Gas (CNG) engines as an experiment
. Although in theory the idea was good (Clean available fuel), the fuel milage was terrible at about 80 miles per tank full (The fuel tank
took up the entire trunk). Also the performance was signifcantly reduced, as compared with the gas engine
I suspect it would be the same with LPG outboards, so depending on the application, you would have to carry a very large tank to make it worth while and your performance would be cut.
I also read a few things about LPG outboards and found numerous people have done conversions. The problem they all talk about is lack of fuel near the water
, difficultly with the fuel bottles freezing over/losing pressure and finally about reduced perfomance of their outboard
Based on that, if you search the internet
you will find several manufactures and sellers on Ebay are selling conversion kits for outboards, as well as a cople of forum discussions on this very topic. I used LPG Outboard as search words.
IMHO... Spending several thousand dollars on an LPG conversion because of fuel quality seems a bit extreme to me... I would just purchse some fuel stabilizer and call it a day, but I am not you.
I sometimes shoot my mouth off... So don't let me deter you. I wish you good luck and if you do the conversion, I would be interested in hearing how it works out.