Re: how much TM for a 18' bass buggy pontoon
I have the same kind of toon and had the same problem.I wanted to go to a larger TM but found out the wires that was installed befor I bought to boat wasn't even big enough to run the 48thrush that was on there and that's why it didn't last.So I upgraded my wireing and put in a heavy duty plug end and a heavy duty on off switch,just to be on the safe side.I'm sure that won't be your case,but you might want to check it befor you buy a new TM. That's just something a I didn't think about when I bought the boat.
But to answer your question,I went to a 24 volt system kind of overkill for my toon,but I do alot of fishing, and my wireing is updated it should last a long time.But that's just me,what you had is probably just fine to go back to.

Jim