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  #21  
Old 01-11-2017, 01:12 PM
Waxy Waxy is offline
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Originally Posted by pale ryder View Post
Here is a Skeeter ZX 22 bay.
F150 vs VF250.
Most of the "max it out" crowd would say a 150 on a boat rated for 250 is under-powered. But is it ? Doesn't look that way to me.
F150 at 33.9 mph is 4.24 mpg. Top speed of 46.4.
VF250 at 33.0 mph is 4.23 mph. Top speed of 59.2.

So, we can lay to rest the myth that more hp = much better mpg.

http://yamahaoutboards.com/sites/def...-28-10_bay.pdf

http://yamahaoutboards.com/sites/def...-28-10_bay.pdf
I look at that data very differently, for me, it presents a pretty compelling argument to max. out HP.

Max. fuel efficiency of both motor is at 3500 RPM. The 150 is great at 4.65 mpg, but your cruising speed is 24MPH. The 250 is pretty close at 4.23 mpg, the difference is, your cruising at 33MPH. That's 30% faster for 10% more fuel usage.

As you've pointed out, at 33MPH, the fuel usage is essentially identical, the difference is, the 250 is spinning 1000RPM less to maintain that speed. It isn't working nearly as hard.

The 150 at WOT is going 46.4 MPH, getting 2.97 mpg, at 46.5 MPH, the 250 is getting better mileage, at approx. 3.15 mpg. It's also doing that while running roughly the same RPM as the 150 has to run to go 33 MPH.

The ultimate kicker is that the 250 has lots left and will perform much better when the boat is loaded up, the water's rough, you're pulling a skier, etc... On top of that, if you need it or want it, it'll run all the way up to 59.2 MPH and still be within 0.3mpg of the 150's fuel economy at 46.4mpg. 13MPH on the water is very significant. Add in a full second faster to plane and 2 full seconds quicker to 30MPH, and I don't see how the 250 isn't the obvious choice, barring one factor - up front cost.

Waxy
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  #22  
Old 01-11-2017, 04:57 PM
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pale ryder pale ryder is offline
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Originally Posted by Waxy View Post
I look at that data very differently, for me, it presents a pretty compelling argument to max. out HP.

Max. fuel efficiency of both motor is at 3500 RPM. The 150 is great at 4.65 mpg, but your cruising speed is 24MPH. The 250 is pretty close at 4.23 mpg, the difference is, your cruising at 33MPH. That's 30% faster for 10% more fuel usage.

As you've pointed out, at 33MPH, the fuel usage is essentially identical, the difference is, the 250 is spinning 1000RPM less to maintain that speed. It isn't working nearly as hard.

The 150 at WOT is going 46.4 MPH, getting 2.97 mpg, at 46.5 MPH, the 250 is getting better mileage, at approx. 3.15 mpg. It's also doing that while running roughly the same RPM as the 150 has to run to go 33 MPH.

The ultimate kicker is that the 250 has lots left and will perform much better when the boat is loaded up, the water's rough, you're pulling a skier, etc... On top of that, if you need it or want it, it'll run all the way up to 59.2 MPH and still be within 0.3mpg of the 150's fuel economy at 46.4mpg. 13MPH on the water is very significant. Add in a full second faster to plane and 2 full seconds quicker to 30MPH, and I don't see how the 250 isn't the obvious choice, barring one factor - up front cost.

Waxy
My point isn't that the 150 is "better", I was just dispelling the myth that maxed out = better gas mileage.
To me the best choice is whatever best fits your needs wants and budget.
If our budget makes you chose between a maxed out 17' boat and a less than maxed 18", for some people the 18"er is the better option.
On my boat the extra cost of the 200 over the 150 is the cost of a kicker or some nice electronics. Which will help me catch more fish, 3 more mph top speed or a big upgrade in electronics ?
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  #23  
Old 01-12-2017, 07:10 AM
Waxy Waxy is offline
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Originally Posted by pale ryder View Post
My point isn't that the 150 is "better", I was just dispelling the myth that maxed out = better gas mileage.
To me the best choice is whatever best fits your needs wants and budget.
If our budget makes you chose between a maxed out 17' boat and a less than maxed 18", for some people the 18"er is the better option.
On my boat the extra cost of the 200 over the 150 is the cost of a kicker or some nice electronics. Which will help me catch more fish, 3 more mph top speed or a big upgrade in electronics ?
I don't think it's necessarily a myth, the numbers presented above show that. The biggest factor is how you're going to use your boat.

If you're the type of person that prefers to drive a little faster, or is always carrying a bigger load of passengers and/or gear, then the larger HP motor will give you better gas mileage.

If you're on a smaller lake, generally fishing with a light load and you're not the type to be in a hurry, then the smaller HP outboard will give you better fuel mileage and save you on up front cost.

I agree it comes down to personal preference and making some tough choices as you've pointed out, but I think people should be aware that they are sacrificing both performance and fuel economy in most cases by going with a lower HP outboard. There's more to boating/fishing than just top speed or fuel efficiency in my opinion. A boat with max'ed out HP performs better and is simply more enjoyable to drive and operate in all conditions. That's worth something too.

The other point I'd make is that kickers and electronics are fairly simple to upgrade at a later time, re-powering a boat is not simple. The cost to upgrade electronics is also very reasonable when compared to the cost of re-powering.

Waxy
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