Hi all, I'm not a new member but never posted here before.Some of you will recognize me from other forums as I continue on a restoration of a 1968 (hull #5) 23' Commander. As I near the completion of the mechanical phase I will soon be purchasing a prop. Originally the boat came with a 327F rated at 210Hp. I have had a new SBC built for this boat, A 350 warmed up to about 315Hp to stay within the safety guidelines of my V-drive's listed 300Hp rating. I have been in contact with Michigan Wheel and Acme and others for recommendations for diameter and pitch and cup, all of these resources have been very helpful but unfortunately they all conflict in small variants.For a baseline I thought it would be good information to know what prop this boat came with when equipped with the 427 which made an advertised 300Hp.

Does anyone know the diameter and pitch of the correct prop for this boat with the 427?

Many thanks,

Craig Wilson

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Jim was out of the office last week so I left him a detailed e-mail describing my project. He replied back with a recommendation of two different props.

Hi Craig,

I'd say you need one of these props:

# 1774 --- 13.00X10.50VR3B 1.25 .080

# 546 --- 13.00X11.50VR 3B 1.25 .080


Both in stock and currently available.


My first choice is the 1774, and I do think it is the better choice, but I wouldn't be opposed to the 546.


Please let me know.


Thank you,


Jim Thelen

Sales Engineer

ACME Marine Group

123 North DeKraft Ave

Big Rapids, MI 49307

P: 888.661.2263

Alt: 231.592.8711

E: jthelen@acmemarine.com

W: www.ACMEmarine.com

As you can see both recommendations are the same diameter as original but both are less pitch. The archive states that the boat was supposed to be fitted with a 13DX12P with the 327 but my hull card shows that it was equipped with a 13DX13P. Now I understand that the .080 cup will add the equivalent of about 1" of pitch but by my calculation that only brings a 11.5" pitch to about 12.5-13" which is right back to what was spec'd for the 210 Hp rated 327. With around 100 Hp more I expected to see a bigger difference. I have sent Jim a followup e-mail with these questions, I will post his reply.

Craig

I didn't know they sold direct. I purchased my Acme props from Nettle Props in Texas, best price I could find. And they included a $50 coupon toward prop repairs.

It’s all in the wot rpm. What are you giving them for your desired wot rpm? 

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