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Originally Posted by menacer
I am also using a 15x17 ss prop on a 155 commercial evinrude. *I get about 38 mph wide open. *Is the 15x17 prop used by most of you on a step v 20 ? *I was going to try some different prop sizes but I think I'll leave it alone if that's the best torque and speed I'll get. *Dennis
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I've never herd of a 155 commercial Johnson what year is the engine. I had trouble matching my vin. number to part # when trying to find a few parts. The place working on my motor said that it was a Military issue and when I asked the difference they had no idea. They thought maybe a little more corrosion protection and gearing than the commercial engine.