Bushwacker is an e-tech guru. I feel that for 4 strokes above 100 hp, they get heavy fast. Like a 4 stroke 150 is often a loser for weight/ hp. But I think(?) an e-tech 130 is a decent tradeoff. Some guys like a suzuki 140. I quietly think it is a tiny bit heavy for a potter 20, but might be ok for a tracker 20. I am not impressed with the corrosion resistance of most anything versus a Yamaha. But I really don't know.
FWIW, I think a 4 blade stern lifting 15" pitch prop on that F115 would have done you justice. I have that on the F100, but it has more lower unit reduction. 2.31:1 versus 2.15:1.
The new Yamaha F115 is almost as light as an older F100/F90. 377lb for a 20"shaft? The F200 is only 110 lb more. But I have no firsthand knowledge.
My cruise for the F100 on a potter 20MA is just under 25 MPH. Even with a kicker and hydroshield.
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