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9,261 Posts
Discussion Starter · #1 ·
7 Tips for Getting the Most From a Tank of Gas

1.Leave the extra junk home:Don't load up the boat with weight you don't need.Do a little spring cleaning-unused equipment that has been collecting mildew in the bottom of lockers should be taken home or discarded.

2.Water weight;This isn't about your diet.At 8.33 pounds per gallon,why keep the water in the tank topped off if you're only going out for the afternoon.

3.Tune her up: An engine with fouled plugs,a dirty air filter,erratic timing,a sputtering carburetor or weak compression will gobble up fuel and perform dismally.A tune-up is an excellent investment and could easily pay for itself over the summer.

4.Tune your prop:You can lose up to 5mph of boat speed with a poorly tuned prop.If your boat goes 50mph with a like-new prop and only 45mph with a prop that's dinged and out of pitch,you've lost 10% of your speed but are still using the same amount of fuel economy.

5.Clean the boat's bottom:A fouled bottom is like a dull knife;it takes a lot more effort-fuel-to push it through the water.Barnacles and slime slow the boat dramatically and increase fuel consumption.

6.Keep the boat in trim:either by using trim tabs or with weight distribution.A boat that is trimmed correctly will move through the water with less effort-and less fuel.

7.Install a fuel flow meter:A fuel flow meter is like a heart monitor;when consumption starts to rise,it's an early warning sign that something is a miss.A fuel flow meter also allows you to select a comfortable cruising speed that optimizes the amount of fuel being consumed.If you don't want to spring for a fuel flow meter(about $300.),you can calculate your fuel mileage by dividing distance traveled by gallons at fill-up.Using your logbook,you can then approximate fuel flow using average speeds and time under way...

Anybody else have some Fuel Saving Idea's ?

20,269 Posts
Don't keep a full gas tank unless you are planning to use it... or if you see cheap gas (good luck). I have a 179 gallon tank... lots of weight. I also used to always use my livewell for everything from minnows to mullet... now a minnow bucket or a bucket of fresh dead peanuts go offshore with me for tossin.. a full 35 gallon livewell is almost 300# of dead weight on the transom.. makes a boat like mine that is a little underpowered (225 ficht) really strain to get up on plane with a couple guys on board.

One more thing... if you are buying new... a higher horsepower engine will burn much less at lower throttle than a lower HP at high RPM's.

1,020 Posts
Know your boat?s performance. Below is the Performance Data for the same 250 HP outboard motor (different props) on a 28? 5880 lb. boat and a 36? 14,550 lb. boat of the same manufacture. Note that Boat 1 gets the best miles per gallon (MPG) at 3500 RPM. Boat 2 gets the best MPG at 4500. If Boat 1 runs at maximum RPM it nearly triples the GPH. You can develop this data for your boat using a GPS (even a hand held), tachometer, and a flow meter. Remember, the amount of fuel, the number of passengers, or any additional weight will affect your MPG. Go to your authorized outboard motor dealer for recommendations for the best prop to use.

Boat 1 Performance Data:


1000 5.1 2.0 2.51
2000 7.4 3.9 1.92
3000 14.6 11.0 1.32
3500 25.2 13.6 1.86
4000 31.1 16.8 1.85
4500 35.3 22.2 1.59
5000 40.0 27.4 1.46
5500 44.0 33.5 1.32
6000 48.8 43.7 1.12

Boat 2 Performance Data:


1000 5.5 3.9 1.43
2000 9.5 8.1 1.17
3000 12.7 15.7 0.84
3500 16.5 20.9 0.79
4000 25.0 27.0 0.93
4500 31.1 33.3 0.93
5000 35.5 39.0 0.91
5500 39.5 46.7 0.85
6000 44.3 60.2 0.74

[ 08-20-2005, 05:50 PM: Message edited by: maine_sport ]
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