"Inno" wrote in message
ups.com...
I've had my "new" 99 Larson LXi 186 out for two weekends now and cannot
believe the gas consumption. At around 25 mph it uses about half a
tank per hour! I think it works out to around 2 mpg!!! I expected at
least 5 mpg, and even that would not be impressive.

I have changed the plugs since last weekend as they were a little
carboned up, but not bad. Can't see any improvement in fuel
consumption. I am planning on getting a mechanic to look at timing and
carburetor settings.

Anything else that folks can suggest I look into myself before that?
The boat has been lightly loaded and I think I am not messing up the
trim too badly, after getting some advice here.

TIA.


I would expect better fuel consumption. I get about 2 miles per gallon on a
21' 350 MPI engine aluminum jetboat. The plugs showing lots of carbon,
would tell me something is running rich. As to the 1/2 tank, just need a
bigger tank. I can run a little less than 3 days at Lake Oroville. Is
about 6 miles short of the ramp when I ran out of gas. 67 gallon tank.