I have the 3GMD engine in my 35-3, with tranny gear ratio of 2.61. The PO had a fixed 3-blade prop that was 15" diameter, 14 pitch. I replaced it this year with a Flex-o-Fold 2 blade geared prop that is 15" with 12 pitch. Both props push the boat to 7.5 kts in the 3200rpm range, and I get boat speed of 7.1 at 2800rpm. The PO ran between those ranges, so I do too. I'm pleasantly surprised that it reverses so well. On the other hand, I can feel a little more vibration in forward than the 3-blade fixed; this seems to happen in the 1800 to 2200 rpm range.
Last week, we raised the sails, shut off the motor and were making 6 kts. I could hear a kind of humming, and realized the drive was in neutral and the prop was spinning. I put it in reverse. The humming stopped, and Spirit almost lurched to 6.4 kts. It was that instant! Loving the folding prop; I got it brand-new in the box for $700 from a guy that sold his boat before he could mount it. Jason Ainslie, Spirit 1984 C&C Mk III Bayfield, ON _____ From: CnC-List [mailto:[email protected]] On Behalf Of Garry Cross via CnC-List Sent: June-07-16 2:23 PM To: [email protected] Cc: Garry Cross Subject: Re: Stus-List Propeller While were on the subject. My 35-2 with 3GM30, don't know transmission yet, has a 13x12 fixed prop. It might be 12x13, just going on memory. >From the looks of things the diameter cannot be much more than it is as the clearance to the hull is between 1-2 in. My problem is I cannot get to hull speed. The engine does not seem to be labored and I can get to 3600 rpm without effort. My speed is around 6kn when I am going at those RPM. Just wonder what others have with the same engine on a 35-2. ---------- Forwarded message ---------- From: Bradley Lumgair <[email protected]> To: "[email protected]" <[email protected]> Cc: Date: Mon, 6 Jun 2016 23:42:29 +0000 Subject: Re: Stus-List Propeller I have some C&C charts on my iPad that show the original prop for several of the models, original engine models, and prop sizes. 16 X 10 is the ONLY size listed for the 33-2 in either fixed or folding. When I figure out how to load it I will post here. It may have come from the CnC photo album, I just can't remember. I'd rather be sailing
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