Prop Pitch Question

[Ereiss]

Can anyone tell me what the pitch and diameter of the standard prop that was on the F38? I need to adjust my max-prop and this data would help me rather than "let's try a little more and see how it works" approach.

Thanks

[sailmd]

Hi,

You may have gotten your answer long ago, but since I just joined and am in the process of re-pitching my maxprop, I recommend you call PYI (800-523-7558) and speak to Ian. He walked me through it a few days ago.

Cheers,
John

[DaysailorJ]

I'm not sure if the pitch would be the same as on my 40/40, but it should be, as the wetted surface and displacement is similar. (I didn't like the data I got from PYI, as the real settings should be confirmed with sea trials.) My Max-Prop settings are X=C, and Y=K.

As a side note--When the first prop "expert" down here reinstalled my prop. without a real understanding of these alignment marks, the pitch was so far off that my engine belched black smoke and oil whenever I engaged the prop., leading to my having to pull the boat and remove and reset the prop. I hope you are more successful.

John

[Ereiss]

Thank you, I did speak with PYI and we set it back (ie, less bite) by one setting given that I couldn't get the rpms up under load. Will see how it goes on sea trials and if not quite right can readadjust further on next haulout. Hope not soon.

thanks

[DaysailorJ]

Ed,

Just out of curiosity, did your PYI-suggested settings come close to what I gave you from my 40'? (x=c, y=k)

John

[Ereiss]

I will check when I'm on the boat. Wrote it down in the instruction book.

regards,

[Cloud 9]

In the interest of assisting Freedom 35 owners I'm posting my 3 blade Max Prop info. PYI and Freedom origionally specified a 16' prop. I purchased a 17' and PYI reccomended a pitch of 11 degrees. Our local boatyard which has done quite a few reccomended 14 degrees of pitch. I started at 14, went to 16 and then to twenty degrees. The twenty was too much pitch and caused overheating. I slipped back to 18 degrees and it's perfect. I still get a max rpm of 3300 and she hums right along at 2800 rpm. I hope this helps save some aggravation.

Gordon

[Ereiss]

I did check my settings, I'm at 18 degrees. Seems to be about fine. For what it's worth.

[DaysailorJ]

Ed,

Just out of curiosity, where are you in Jamestown? I have been at Conanicut, JBY, and most recently for two years in Dutch Harbor. I was thinking of getting a mooring at DH again next summer when I return from PR, but I heard that things were a little shakey there... Any reports would be appreciated,,,

John
S/V Elizabeth










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