I don't know about the boats, but I have a 150 Merc. Optimax that I can't seem to run the gas out of. I bought my boat Monark 195 King September of last year and have been on the water at least 35 times and ran my motor a lot and it still has a little under a half a tank of gas in it. It does have a big tank, however my 2001 xr6 150 used at least .5 gallons a minute. I love my new one.



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