fischnrod
Well-known member
How many miles to a gallon af gas are you guys getting in your boats?
estimate as close as possible if you can please..
estimate as close as possible if you can please..
GAS MILEAGE
- Thread starter fischnrod
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beetlespin
Well-known member
3-4 in my Z119/225SHO depending on how I drive
elwestb
Well-known member
I remember when Mercury's Optimax ads came out a few years back. They had Roland Martin bragging about his Ranger / 250 Optimax with a 50 gallon tank. He said that he could run 200 miles before he needed to fill up. At that time I had never really thought about what was good or bad for a boats fuel consumption. So I asked around to a couple of marine mechanics. I asked them if 4 mpg was supposed to be good? Their replies were all Yes! Now with that in mind, what would you do if your car / truck got 4 mpg?
fischnrod
Well-known member
With gas as high as it is I thought I would get more response than this, I know some people have to be keeping track of it surely...
I`m not going to argue or debate the numbers...just throw them out. And I`m trying to remember back about 3 years. We were fishing a club TX on Watts Bar and the question came up about MPG. I got out the map and used the numbers from the mile marker to and from Rockwood Landing launch site instead of GPS because of time and distance on trolling motor. The best I can remember it was about 31 miles on 3.8 gallons.
This was with a brand new Merc 225 Pro XS on a `94 Bullet. Livewell was probably empty on the run down and there was some idling time in the mix. The reason for the exact gas used number is because I have MercMonitor. Coupled with engines computer counting each rotation of the engine and the pulse width and duration of each injector you get a pretty close number on Fuel Used. I have checked the Fuel Used number against the fill up numbers at the gas station and it is within a couple of 1/10ths of a gallon on a 34 gallon fill up. That was with my partner and his gear and 50 lbs of mine. I believe my year model Bullet hull weighs 1050#. I wasn`t wringing it out much either. Probably no WFO since I was in break in mode and about half scared of it !
There you go !
This was with a brand new Merc 225 Pro XS on a `94 Bullet. Livewell was probably empty on the run down and there was some idling time in the mix. The reason for the exact gas used number is because I have MercMonitor. Coupled with engines computer counting each rotation of the engine and the pulse width and duration of each injector you get a pretty close number on Fuel Used. I have checked the Fuel Used number against the fill up numbers at the gas station and it is within a couple of 1/10ths of a gallon on a 34 gallon fill up. That was with my partner and his gear and 50 lbs of mine. I believe my year model Bullet hull weighs 1050#. I wasn`t wringing it out much either. Probably no WFO since I was in break in mode and about half scared of it !
There you go !
Gator
Well-known member
I have an old 1984 merc and don't have a clue as to mpg but would love to know. All I know is that it takes me about 6 gal each trip.
I did locate an article that might help us all. See below.........
Figuring out fuel mileage on a car is simple. Fill the tank completely, jot down the current mileage and drive until the tank is near empty. At the next fill-up, note the miles traveled and the gallons of fuel it takes to refill the tank. Then divide the miles traveled by the number of gallons of the second fill-up.
It's a different story with a boat. Miles aren't easy to measure on water, so fuel consumption is measured in gallons per hour. You measure fuel efficiency in pounds of fuel used per horsepower developed per hour. The pros call it "brake-specific fuel consumption." This makes it important to know that gasoline weighs about 6 pounds per gallon.
On average, an in-tune four-stroke gasoline engine will burn about 0.4 to 0.45 pounds of fuel per hour for each unit of horsepower. Likewise, a well-maintained two-stroke outboard burns nearly 0.6 to 0.8 pounds of fuel per hour for each unit of horsepower it produces. These figures apply to carbureted and fuel-injected engines, but not to direct-injected engines such as Mercury's OptiMax and OMC's FICHT models.
Confused yet? Look at the mathematical examples below that show the figures for a 50-horse engine, and it should become clear.
Keep in mind that these formulas apply when the engine is making peak horsepower, which usually is near wide-open throttle. Fuel consumption will be decreased at cruising speeds. Also remember that newer engines with loop-charged intake systems, fuel injection and direct injection will yield higher fuel efficiency than older, cross-flow fuel systems that were manufactured as late as 1990. Cross-flow systems are antiquated and wasteful compared with the technology available today.
To apply these formulas to your boat, just plug in its horsepower rating and multiply the top, then divide theresult by the bottom. For two-stroke engines, another way is to take the total engine horsepower and divide it by 10. As you can see, this formula is simpler to calculate and easier to remember.You don't even need a pencil and paper. It's just not as accurate as the formulas above. The result represents the approximate gallons per hour the engine will burn at wide-open throttle. For example, a 150-horse engine will use about 15 gallons per hour.Though these figures represent averages and can vary from 10 to 20 percent, they'll put you in the ballpark so you can plan along-distance cruise.
I did locate an article that might help us all. See below.........
Figuring out fuel mileage on a car is simple. Fill the tank completely, jot down the current mileage and drive until the tank is near empty. At the next fill-up, note the miles traveled and the gallons of fuel it takes to refill the tank. Then divide the miles traveled by the number of gallons of the second fill-up.
It's a different story with a boat. Miles aren't easy to measure on water, so fuel consumption is measured in gallons per hour. You measure fuel efficiency in pounds of fuel used per horsepower developed per hour. The pros call it "brake-specific fuel consumption." This makes it important to know that gasoline weighs about 6 pounds per gallon.
On average, an in-tune four-stroke gasoline engine will burn about 0.4 to 0.45 pounds of fuel per hour for each unit of horsepower. Likewise, a well-maintained two-stroke outboard burns nearly 0.6 to 0.8 pounds of fuel per hour for each unit of horsepower it produces. These figures apply to carbureted and fuel-injected engines, but not to direct-injected engines such as Mercury's OptiMax and OMC's FICHT models.
Confused yet? Look at the mathematical examples below that show the figures for a 50-horse engine, and it should become clear.
Keep in mind that these formulas apply when the engine is making peak horsepower, which usually is near wide-open throttle. Fuel consumption will be decreased at cruising speeds. Also remember that newer engines with loop-charged intake systems, fuel injection and direct injection will yield higher fuel efficiency than older, cross-flow fuel systems that were manufactured as late as 1990. Cross-flow systems are antiquated and wasteful compared with the technology available today.
To apply these formulas to your boat, just plug in its horsepower rating and multiply the top, then divide theresult by the bottom. For two-stroke engines, another way is to take the total engine horsepower and divide it by 10. As you can see, this formula is simpler to calculate and easier to remember.You don't even need a pencil and paper. It's just not as accurate as the formulas above. The result represents the approximate gallons per hour the engine will burn at wide-open throttle. For example, a 150-horse engine will use about 15 gallons per hour.Though these figures represent averages and can vary from 10 to 20 percent, they'll put you in the ballpark so you can plan along-distance cruise.
Fuzzy
Well-known member
I ran about 30 miles on Guntersville 2 weeks ago, 32 miles on Watts Bar Saturday, 18 miles on Watts Bar Sunday. Boat took 14 gallons on gas so MPG would be around 5.7mpg. I have a 2006 188VS with a 150hp Yamaha.
Where did u go Saturday, being a local , I thought I might get to follow u around to learn.....I probably ran about same. Wish miles equaled fish in livewall, guess it just means fuel & oil emoScratch . Glad to have u @ FWAS event Saturday....... emoGeezer emoUSA
fischnrod
Well-known member
That seems pretty good right there, if I could get 6 miles to a gallon I would be in hog heaven!!
Skeeter
Well-known member
My Bayliner gets 2MPG cruising at 4000 RPM. My Javelin gets pretty good mileage for a carb. motor. I would say it gets about 2-4 depending on driving habits. One thing I will never do again is let it get below half a tank.
I get just over 3MPG at full-throttle... I have Z521 with a 250SHO. Ironically, I dont know for sure, since my long runs are in tourneys, but I dont think I get much better if I back way off the throttle... It is just a guess at this point. The only time I tested it was I ran approx 50 miles and burned 17 gallons in a tourney at full-throttle 95% of the time. I have only had my boat since January so I am still trying to figure out my most economical speeds etc... when not tournament fishing... I have to run full throttle in tourneys bc wide open im only running 64-67 (slow ride baby) depending on amount of fuel in the boat.
stratos21xl
Well-known member
- Joined
- May 31, 2009
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Mine really depends on how I drive it. WOT I am still getting 3.5 to 4 mpg (depending on weight/load) and I have seen as high as 5.5 mpg between 3500 and 4200 RPM. When I was breaking it in we went from the Riverpark to Hales Bar and back and I burned between 1/4 and 1/2 tank of gas. I do have a 52 gallon tank so 20 gallons burned...give or take a gallon. That's 2 guys loaded to fish but empty live wells. The water was pretty rough that day so there was very little if any runs above 4500 RPM.
BRamsey
Well-known member
Are you all saying that you get better gas mileage with a full tank? I've heard that before but it seems that the more gas you have the more weight you have? Just wondering.
Fuzzy
Well-known member
Mine seems a tad high, but if you add the putt putting around with a graph, it's got to be close. I usually keep the rpms around 5000.
REELWORLD42
Well-known member
I have a 1999 Stratos 21' ss extreme with a Johnson 225 ho I was getting 1 to 2 mpg until I put a new timer base , stator and a power pack now I get 3 to 4 mpg. I use Google Earth to figure miles on the water.
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