Consumption of a 90hp?

[droo88]

Hi, new here 

I am interested in buying a boat (had a small 13 foot displacement one last summer but the mooring was cut and the boat was lost )

Now I am looking for a planing hull and have found a couple of 17 footers. My question is what fuel consumption should I expect from a 17 foot planing hull powered by a 90 2stroke mercury? My previous boat had a 35 2 stroke evinrude bolted on and was not so bad regarding fuel consumption at cruising although it was slow (crusing 6-7 mph, max 18-20).

Thanks!

[baghira]

for fishing??
Find something else.... you're looking on the wrong side of the moon man.....
Wrong hull, wrong motor..

[benri]

I had a 16ft planing hull with a 90hp 2 stroke - since 5 years I switched to a 20ft hull with a 140hp 4 stroke and consumption is at least half!! Look away from old 2 strokes! Etecs and the new stuff are a different story.

[skip]

If it's a straight 2-Stroke Mercury (Like their Saltwater or EFI) then avoid, unless it's an Optimax Direct Injection.

On a fairly heavy 18.5 foot planing hull with a 90hp DI engine at 20 knots I was using around 16.5-17.5 Litres per hour and around 4-6 litres per hour trolling at 6 knots.

[malvizzu]

As Skip rightly said, don't go for a staight 2-stroke engine cause it will make a deep hole in your pockets. Go either for a 2-stroke Direct Injection (Evrinrude ETEC, Mercury Optimax or Tohatsu TLDI) or for a 4-stroke engine (Suzuki, Mariner, Honda, Yamaha).

[droo88]

Thanks for your advice. I kept on looking and found a 15 foot boat with a 40hp motor. Should take me to comino and back with some stops for fishing on the way .

[skip]

Thanks for your advice. I kept on looking and found a 15 foot boat with a 40hp motor. Should take me to comino and back with some stops for fishing on the way .

4 Stroke or DI?

[droo88]

Its a 2 stroke, but is small displacement (650cc) and should give me about 5-6mpg cruising. Quite comparable to my previous boat.

I had a look at boats with 4 stroke engines but the price was x3-4 as much and didn't seem worth it as I am not going to be using the boat that often.

[DEXTER]

How much would i expect to consume by trolling  on a 14 foot fibreglass boar with 30hp 2 stroke evinrude of 1999? With same boat but honda 30hp 4 stroke by trolling i consumed 6 euros in six hours.(1euro hourly).

[baghira]

what speed?
I am assuming that you would consume x 3 or a bit more...........

[skip]

That's 0.66L per hour (3.95L total)? Were you just in gear at quasi idle speed?

[DEXTER]

yes I was in gear with little speed.approx 2 knots.