1987 90HP Evinrude

[KAJUNGA]

I have a late 80's evinrude outboard. I believe it has been overhauled once. It runs great. However , it sucks the fuel. I consume about 5 gallons in 1 hour. I think I should purchase some Exxon Stock. All I do is get the boat planed and thats my cruising speed. The boat is a Boston Whaler. Is this normal? What can I do to remedy this situation.<br /><br />Thanks in Advance

 

[tscott]

Re: 1987 90HP Evinrude

What is the length of the boat? What rpm's are you turning when you are on plane?? What is the diameter and pitch of your prop??

 

[ob]

Re: 1987 90HP Evinrude

Sounds normal to me.A general estimate of per hour fuel consumption on a two stroke outboard is 10% of horsepower per hour at wide open throttle.On your engine that would equate to around 9 gal per hour at 5500 RPM.

 

[KAJUNGA]

Re: 1987 90HP Evinrude

Boat is 17 feet.<br />RPM's are between 3000 - 3500<br />Sorry , no data on the prop.<br /><br />There is no way I am running even close to wide open. All I do is get the boat planed