Fuel Consumption 2003 SeaRay 220 w/5.0 MPI BIII

[wish2fish]

Curious as to recent fuel consumption on my 2003 SeaRay 220 w/5.0 MPI BIII.

I filled up on 8/24. Put 37.921 gallons in. Ran boat 10.4 hours some of which was on a 75 mile round trip. The rest was going back in forth through no wakes and several other 15-20 mile runs. I usually don't go that fast and try to run just over 3000 RPM. I filled up again at same gas pump, same pump jockey with 39.956 gallons. Fuel is 87 octane.

My question is this 3.84 gallons/hour bad for my setup? Seems bad to me and reading the thread about spark plug changes has me wondering if that would help me out.

 

[SeaRide]

Wish,

Our boats are similar, but certainly not identical. On 70 mile trips, my 230 gets just over 3 mpg. I average 6-7 gallons per hour. Typical cruising rpm is between 2800 and 3200. However, there are about three no wak zones along the way. Personally, i think you are doing fine. If it is time to change the plugs, do so. I would be surprised if your fuel consumption changed much. Do you know your total mileage per trip? Looks like 140 miles or thereabouts??

 

[Bumble]

That doesn't sound bad to me. Through crude measurements I have been averaging around 5GPH with my 4.3. With 2 feet more and 2 more cylinders yours doesn't sound bad. Granted, my mileage is a ton of towing as well as blasting up the lake at WOT here and there. Look around on sites, and maybe you will find your motor and boats specs. I found mine but forget where.

 

[Bumble]

As a follow up to my last post, here is the chart for my exact boat and power plant. Still accurate. If you find a test of yours there should be a similar stats.

 

[tcason]

This was results from a trip down ICW with a full load - 7 guys and overnight gear and refreshments.

We ran about 3200 RPM.


Total Fuel 87.3 gal
Total Time 14.1 hours
Total miles 189
Average speed 13.4 MPH
Miles/Gallon 2.16
Gallons/Hour 6.23