Eddie - Flexofold didn't ask me this when I bought mine, but that was a long time ago. It's held up really well btw.
Couple suggestions; You could pull the existing prop and measure the shaft with a caliper and do the calcs. Or call martec and ask them what specs they manufacture to. They've been around long enough to have input on what's standard. Hope that helps. ________________________________ From: ejwills1993--- via CnC-List <[email protected]> Sent: Monday, October 6, 2025 3:32 PM To: [email protected] <[email protected]> Cc: [email protected] <[email protected]> Subject: Stus-List C&C 30 Mark II - Shaft Taper? Hey C&C Sailors - I’ll be replacing my fixed Martec prop with a folding 2-blade prop this winter when it’s time to haul out. I’m being asked by Flex-o-Fold what my ‘Shaft Taper’ is. According to the boat user manual the taper is ‘standard’ but my understanding is that ‘standard taper’ can mean 1/10, 1/16, or 1/20. According to Flex-o-fold they need this shaft taper info for the correct adapter sleeve. The following info applies: -=-=-= 1. Boat - Make and Model C&C 30, Mark II 2. Engine - Make and Model - Yanmar 2GM20F 3. Transmission Reduction Gear Ratio - 2.62 : 1 4. Displacement (Weight) 8300 lb 5. Water Line Length 25.75 ft 6. Shaft Size or Sail Drive Model - 1 inch conventional shaft 7. Propeller Rotation left hand or right Hand - Right Hand 8. Current Propeller Size and Type (i.e. fixed 3-blade, feathering, etc...) Martec RH 15D x 11P X1 (photo attached) I have also attached photos of the shaft drawing (from user manual) and Martec fixed prop. Martec Prop Photo<https://photos.app.goo.gl/tWbUW7CscPQz38MZ7> https://photos.app.goo.gl/tWbUW7CscPQz38MZ7 Shaft Diagram Photo<https://photos.app.goo.gl/WwZiFewzcUVDwdL87> https://photos.app.goo.gl/WwZiFewzcUVDwdL87 Thanks! -Eddie Wills C&C 30 Mark II ‘Mystic Star’
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