Re: How much fuel to cross lake Michigan? 85 miles...
I run my 21ft Wellcraft on Lake Michigan a couple of times per year. I run from Port Washington to Milwaukee and back. I only run about 4-5 miles out. Lake Michigan can be alot of fun and very beautiful.
That being said, you have to be
VERY, VERY,VERY and did I say
VERY! aware of the weather forecast, especially the wind & waves, with this size boat.
One run 2 years ago we had a nice ride down with 1-3ft waves on Sat so we decided to overnight and go back on Sun. Overnight the wind changed and the run back was head-on into 4-6ft waves and that made for a rough, nasty, wet ride. Any larger and it would have been too dangerous to even try.
Good day
Bad day
And that could be the same day.
The only way I would even consider running across to Michigan would be in the company of several other larger boats and with a flexible enough schedule that I could lay over as long as needed to make a safe journey back.
To the original question, my boat gets 2.4mpg so for 85 miles that would be 35 gallons + minimum of 10% reserve. So at least 40 gallons, 50 would be better. I'm willing to bet that neither the SeaRay nor the Bayliner have over 35-40 gallon tanks.
Bottom line, if you want to make that trip, I think you're going to need a bigger boat.