Posts: 3508
Location: Elk River, Minnesota | Hiya,
No matter how one looks at it, trying to compare one motor technology to another will never be an apples to apples comparison..even in 2 stroke technology....why? Because there are so many factors to consider when making comparisons. Things such as engine displacement, compression ratios, lower unit gear ratios...then tie in props which is also a gearing issue as well. Plus...engines can be rated to a specific HP so long as the engine dyno's within 10 hp of said rating. Case in point.... the 2 stroke yamaha 90 hp as it compares to a 2 stroke Johnson 90 (both carb motors, older 2 stroke technology). Both are rated 90, but the yamaha is built on the same platform as their 70 hp with a 69 cubic inch engine built as a 3 cylinder inline whereas the Johnson is a 4 cylinder 60 degree with 105 cubic inch displacement. No comparison can be made as the Yamaha probably rated more like 81 - 82 hp and the Johnson probably closer to 100. with the potential of almost 20 hp difference, you cannot make a valid comparison.
So...depending on how your 150 merc 2 stroke was set up as compared to the E-tec you have now you do not have an apples to apples comparison, and as such, it is very possible your etec performs better... Which is great for you, but may be too broad for anyone to assume that it will be better for all boats or in all horsepower classifications.
I looked at Etec as well when I was looking to repower, but chose the largest displacement I could find (which happened to be an older 2 stroke)
The technology out there today in the High output 2 strokes and fuel injected 4 strokes make them all great motors,
Apples to apples...is never going to be the case...no matter what...
Edited by VMS 12/22/2013 8:19 PM
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