E-tec fuel consumption vs. 4 strokes at WOT

[whoopy]

I will very interested in a 50 or 60 HP E-tec IF the fuel consumption between 4500 rpm and WOT is comparable to a late model 4 stroke. Does anyone have any real hard data on this or know where I can get it?

 

[ivar]

Re: E-tec fuel consumption vs. 4 strokes at WOT

Havent seen much test data on the E-tecs yet , but tests of larger DI engines shows comparable fuel consumption figures compared to the 4-strokes. <br /><br />link to test on yamaha web site

 

[seahorse5]

Re: E-tec fuel consumption vs. 4 strokes at WOT

Here are factory results with a 50 E-TEC on a 21' pontoon boat. They had a lot of 40, 75, and 90 E-TEC tests, but only this 50hp one. Less than 5 gph at 5500 rpm.<br /><br /><br />RPM MPH GPH MPG RANGE<br />850 2.3 0.12 18.8 507<br />1000 3.0 0.16 18.4 496<br />1500 4.3 0.27 15.8 426<br />2000 5.4 0.42 12.7 344<br />2500 7.3 0.78 9.3 252<br />3000 8.9 1.33 6.7 180<br />3500 12.0 1.92 6.2 169<br />4000 14.3 2.45 5.8 157<br />4500 16.6 3.08 5.4 145<br />5000 19.2 3.73 5.1 139<br />5500 21.1 4.96 4.3 115<br /><br />I didn't find a 50 4-stroke test, but there is a 60hp Johnson (Suzuki) 4-stroke on a 22' pontoon. It was 1mph slower and used 5.86 gph at WOT. It used 3gph at 4000rpm compared to 2.45gph for the 50 E-TEC.

 

[whoopy]

Re: E-tec fuel consumption vs. 4 strokes at WOT

Seahorse: Thank you, this is good stuff. For this application, which is similar to mine, I conclude that fuel consumption may not be a sufficient reason to go for a 4 stroke and all its complexity. I will look for more 4 stroke information. <br /><br />Is the source of these factory results available so I could look at the 40HP and other details.

 

[WillyBWright]

Re: E-tec fuel consumption vs. 4 strokes at WOT

If displacement is the same, at WOT it'll take very close to the same amount of gas to produce the same horsepower. Doesn't matter if it's 2-stroke, 4-stroke, EFI, DFI, carb. But different brands have different displacements and that's where you'll see differences. At less than WOT, the differences broaden widely.

 

[jegervais]

Re: E-tec fuel consumption vs. 4 strokes at WOT

Go to the Evinrude web site and click on the picture of the E-TEC motor. When the animation finishes, click on "Durability,Quality,Reliabilty" Then when that screen comes up, there's a "performance reports" link in the lower right corner of the screen which will take you to ten reports they put together. All of them list data like sea horse provided.<br /><br />-John

 

[tym42ply]

Re: E-tec fuel consumption vs. 4 strokes at WOT

WOT for 50hp (miles per gallon)<br />E-Tec: 6.9<br />Yamaha 50 4-S: 8.8<br />Merc 50 4-S: 7.1<br /><br />At 3000 rpm:<br />E-Tec: 7.9<br />Yamaha 50 4-S: 5.7<br />Merc 50 4-S: 7.3<br /><br />At 1000 rpm:<br />E-Tec: 26.6<br />Yamaha 50 4-S: 10.8<br />Merc 50 4-S: 12.9<br /><br />At Idle:<br />E-Tec: 39.9<br />Yamaha 50 4-S: 11.9<br />Merc 50 4-S: 11.6<br /><br />This is hard data from Bombardier. The E-Tec is MUCH better overall. Sorry 4-Stroke lovers.