Hi George, The longest distance I have motored with my M17 using a Yamaha 4hp 4 stroke was from Isle Royale to Grand Portage in the fog. It was approximately 26 miles and I burned under 1 gallon of gas at 3.5 to 4 knots. Bones ____________________________________________________________ Want to earn more money? Career training and degree programs available.. Get Started! http://thirdpartyoffers.juno.com/TGL3141/4dc7f3dc29464302bd1st03vuc