9.9 kicker GPH MPG

[rov_aaaa]

If I took one of those really long slender crew-rowing boats, the ones that hold 8-10 people, and then mounted a 9.9 Yamaha 2 cycle kicker outobard motor on the side right near the very back, as straight and close to center as it can be for not having a transom, what kind of mileage do you think I could get on perfectly flat, smooth river water?

I mean continuous mileage, as in maximum mileage over a long smooth throttle trip.

If you have no idea then just tell me how many GPH your 9.9 takes at WOT and I'll try and figure out the rest of it myself. (I don't think a crew rowing boat is a planing hall at all)

 

[puddleboater]

Re: 9.9 kicker GPH MPG

Typically the burn rate is one gallon per hour, per ten horsies.

 

[jdsgrog]

Re: 9.9 kicker GPH MPG

I'm not sure if you have the 9.9 already, but if not, you might want to get a smaller motor. A displacement hull is just that, it will go no faster than the displacement speed so you don't need a very large motor. I am assuming one of those crew boats would do well with a smaller outboard. But those are just my thoughts.

As for how many gph, at least for my older motors, that 1 gph for every 10 horses is pretty accurate at wot. if you have a model number of the motor, you may want to give that. It may help.

 

[rov_aaaa]

Re: 9.9 kicker GPH MPG

Well if a 9.9 kicker uses 1 gallon per hour, at WOT, then the only question is How fast would a 9.9 push the crew boat at WOT....

Since the mph is also the mpg, with a 1:1 ratio.

I'll bet I could get 15 mph at WOT, on a long slender Crew boat, and thus 15 MPG.

I haven't bought a 9.9, I don't have a 9.9, I'm just theorizing.

At that point, a 9.9 kicker designed for a fishing boat is "geared" or "prop angled" much more for a larger, but slower moving boat, like bass-boat, so on a long slender crew boat, the limiting factor of the "top speed" of the boat, would be its own prop-angle and rpm top end power curve, before the boat would be using all of the potential "thrust" of the 9.9 hp.

Might have to put a slightly 'sharper" prop on it.

If there's a WW3 and all the highways and bridges are bombed, I'm hitting the water with a 9.9 and a stolen crew boat from the local (now abandoned) high-school.

Where would I go? Probably Canada.

 

[BLU LUNCH]

Re: 9.9 kicker GPH MPG

If I took one of those really long slender crew-rowing boats, the ones that hold 8-10 people, and then mounted a 9.9 Yamaha 2 cycle kicker outobard motor on the side right near the very back, as straight and close to center as it can be for not having a transom, what kind of mileage do you think I could get on perfectly flat, smooth river water?

I mean continuous mileage, as in maximum mileage over a long smooth throttle trip.

If you have no idea then just tell me how many GPH your 9.9 takes at WOT and I'll try and figure out the rest of it myself. (I don't think a crew rowing boat is a planing hall at all)

Your not serious are you? Way too much free time on your hands.......

 

[puddleboater]

Re: 9.9 kicker GPH MPG

Well if a 9.9 kicker uses 1 gallon per hour, at WOT, then the only question is How fast would a 9.9 push the crew boat at WOT....

Since the mph is also the mpg, with a 1:1 ratio.

I'll bet I could get 15 mph at WOT, on a long slender Crew boat, and thus 15 MPG.

I haven't bought a 9.9, I don't have a 9.9, I'm just theorizing.

You are correct in theorizing that if you get the boat moving at 15mph, then you'd get 15mpg based on the 1mpg rate for that motor. However, would you be able to get that boat at 15 mph? Maybe, although since that boat wasn't built to plane, it would be more realistic to discuss its displacement speed. One of the rules of thumb that I read about back in the stone age was that you take the square root of the boat's length (i.e. 16 ft boat would be 4 feet) and multiply it by 1.2. For a sixteen foot boat, the displacement speed would be 4.8 mph. Hence, with a burn rate of 1 gph, then the mileage would be 4.8 mpg.

Results, however, may vary. The above is just an example.