What prop?

[manginilaw]

I have a 1996 Arima Sea Ranger 17, with a 2019 Etec 115.  Need to replace the prop.  Any advice as to the pitch and whether aluminum or steel?  Thank you.

[Tom C]

What prop is on there now?

how fast did the boat go at WOT before the prop was damaged?

What was the WOT engine RPM with that prop?

[manginilaw]

30 knots at 6000 rpm flat calm water, cannot tell prop pitch, numbers corroded, prop not damaged, but cavitation caused some aluminum wear

[Tom C]

OK, the 2019 Evinrude (20" shaft) E-Tec 115 uses a 2:1 gear ratio, and has an optimal WOT engine speed range of 5750-6000 RPM. You're getting that, fine.

But 30 knots is very slow for 115 HP on a 17SR. I would expect the boat to go 33-34 knots at WOT.

I recommend a 14" x 15" Turbo Pontoon 1 propeller.

[Tom C]

I should further clarify that you need the one made specifically for Johnson/Evinrude/OMC/BRP motors which use a slightly smaller labyrinth seal that other manufactures.

You would need Yamaha part # MAR-14115-PR-D0

This is a good price:

https://www.wholesalemarine.com/yamaha-mar-14115-pr-d0-pontoon-j-e-14x15-r/

[Edit: out of stock. Let me see what else I can find]

[Tom C]

https://www.boatownersworld.com/turbo-pontoon-1-propeller-evinrude-johnson-3-blade-14d.html

I recommend NOT using the BRP TBX hub kit, but rather using the Solas Rubex hub kit, which will be much softer shifting.

Solas part # RBX-106 or RBX-106B if used in saltwater.

[manginilaw]

Thank you very much.  The prop you recommend seems to be stainless steel. Can you recommed an aluminum prop? we have a lot of floating stuff in S. Cal. after the rains

[manginilaw]

Also, I may have missed it, but what pitch?  Thank you.

[Fisherdv]

Also, I may have missed it, but what pitch?  Thank you.

The one he mentioned is a 15 pitch

[manginilaw]

Thank you.

[Tom C]

Floating stuff is why you want stainless steel; it is about five times as strong as aluminum, so instead of bending or breaking a blade, you keep boating.