A 115 ETEC would be plenty. Terry England of CC has a 25 bertram with twin 115ETECs that runs great. It is about three times as heavy, a lot wider and deeper than a twenty. I had a Seafari 20 with a 150 Black Max that was much faster than I needed offshore. More than plenty of power even with 3 divers, 10 tanks, extra fuel and several hundred lbs of ice and fish.

With a bracket, any engine will be hard to zero in for low speed planing. You will probably have to experiment with props. See Bushwackers posts for the best insight.

Good luck with it!

Excellent advice here.

These hulls are far more efficient than the formula derivatives.

I have an eagle series 60 degree omc 150 on the transom of my `89 20.
She would not plane under 18 with different stern lifting props.

I put a new tank in last summer and moved it forward.

I also changed the angle of the new coffin I glassed up to hold her.
I had real problems filling the tank because of the angle before.
More weight aft and I had no idea. Now she sits on her lines.

I struggled to maintain plane at 3k rpm.

Now I can hold hard at 2500k with ease and she is sooooo happy.
12 mph. When your hull is wet, she will not pound.

When you go airborne, you will pound.

There is a lot to think about here.

There one on the Facebook page running a proxs 115.

https://scontent.fbos1-2.fna.fbcdn.n...85&oe=5CAF9D6D

My family has a 140 Zuke on an 18 sf. I have had a 130 yamaha on 2 different 18sfs and also had a 150 Johnson on an 18sf. The 130 Yamaha would be the lowest cost to use and the best weight to power ratio, 150 etec would be my 2nd choice due to the power -Vezo has one on his 20 Seafari, 3rd would be 140 Zuke due to reliability and efficiency, and last would be the 115 etec because I think you want more power.

Have the Jedi’s and David Copperfield been notified about the magical 12 mph planing ability?? Congrats Sandy. The CSC Bible is never wrong.....

Found a really good deal on a 2009 evinrude 130 etec. I have heard the new 135HO is darn good on these hulls. Since this is only 5HP less what do you guys think? Can get the motor and rigging for about 2 grand. Owner is fine with running it on the stand for me and letting me check compression

That 135 HO Etec is a detuned 150… I would grab that if you can.

Sorry, that was a typo. Fixed it. The engine is a 2009 130.

What Snookerd said, "I would grab that if you can" ! Especially if it has good compression on all cylinders and clean. $2,000 seems like a good price. Good luck!!

The 130 etec is still a great motor. The exhaust system has a mechanical tuning feature to give it the extra 15 hp from the 115. I have read that component can get stuck open or closed.