NC Game Fishing Posted January 4, 2021 Report Share Posted January 4, 2021 Just purchased a 1996 Bonefisher 16'6" 85 Yamaha 2 stroke. Classic Boat. Plan on getting my 14 and 16 year old boys addicted. I have a fuel leak in the original TNT 30 gal tank. I suspect it's in a weld but have no idea. Suggestions? I believe it can not be removed through the bow hatch but I am not 100% sure of that. Cutting off the bow cap doesn't sound like its in my budget. But I will do what's necessary. I have also been told a smaller 20 gal poly tank may fit through if I cut out the old tank. I would be somewhat worried about the range on a 2 stroke motor at 20 gallons. I would really appreciate the wisdom from the Forum. You can insult me :) I assume they built these boats where you mix the oil and gas in the primary tank, I looked high and low for an oil reservoir. Quote Link to comment Share on other sites More sharing options...
Toeknee217 Posted January 5, 2021 Report Share Posted January 5, 2021 congrats on your new boat! The old 85 Yamahas don't have oil injection I believe so you need to mix the oil and gas before you fill it into the fuel tank. I have to do that for my old Mercury as well. I typically pre-mix the fuel and oil into 5 gal jugs and then pour it into the fuel tank. You need to see what premix ratio yours calls for and mix it correctly. mine is 50:1 for example. As far as the fuel tank leak, you'll find a couple of different threads on here about tank replacement. Mine included. I was quoted $2k plus from reputable shops to do the job but ended up doing it myself and saving a LOT. Double check that it isn't just a leaking sender unit gasket or fuel hose. Im not sure it would be a crack at a weld, these tanks typically leak from pinholes caused by rust. Quote Link to comment Share on other sites More sharing options...
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