3200 RPM Max, 225hp LM318....

[Paul - SW Ontario]

Good to hear Paul, I'll be interested to hear the results. My guess is the 14 x 9 will end up giving you better results however only testing will tell. I'm not in a big hurry to get the props back so if you would like to try them both under varying conditions, take your time and do that.

Thanks Paul, I appreciate that...itching to try them soon.

[Paul - SW Ontario]

I have an F28 with twin 318s and it has, I believe the orginal 14x11. As I had a parts f28 I had two extra props and had them cut back to 14x9. I had the same problem and hope this fixes it. I have not tried the 9s yet but looking forward to your or my results.

I'm curious to hear your results as well...be sure to let us know.

Can only assume that as some of our engines tire a little over so many years of service, and the extra weight that mysteriously finds it's way aboard, and our not so perfect bottoms.... that the factory prop specs no doubt need some tweaking to keep pace with the original new "dry" boat performance numbers.

[larryeddington]

on my f28 bottom clean and fresh engines. I am banking on the 14x9s making a good difference.

[Paul - SW Ontario]

Problem solved....Thanks to Paul in Windsor.

Paul was so kind as to lend me two Nibral props to try, a 13 x 10 Cupped Dyna Jet...and a 14 x 9 Cupped DJX.

The performer was the 14 x 9 DJX. (For record, the 13 x 10 laboured badly and couldn't reach 3000 rpm)

800 RPM was given back to me on a Nickel Bronze Aluminum Platter!

Me old 318 has roared back to it's WOT at 4000 rpm.....very happy to put it mildly.

Horse power to weight ratio has to be coupled with the 'perfect' prop on these old inboards....simple! (Simple now that It's figured out, lol)

Paul, the best part is now the admiral has stopped asking me if we need to repower....Thank you! (Sending you a PM)

[TexasTrojanF28]

That's great to hear!

[Paul - SW Ontario]

That's great to hear!

[oil&water]

Congratulations! I know just how frustrating it can be with the boat not hitting peak performance.

[prowlersfish]

Glad you got her right .