need help diagnosing an annoying issue

[fish_hntr]

[quote wall3y3]Here is another thing to consider that I did not see mentioned. DO NOT use higher octane gas. Higher octane gas will cause the symptoms you describe and the higher in altitude you go the worse it will get. As a side note if you live in Utah and you buy high octane gas for your car that says high octane only you are wasting your money.[/quote]

We only use 88 octane ethanol-free in the boat.
[signature]