Shaft Coupling Nut for 2012 R25SC

CalypsoOwner

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Joined
Oct 14, 2026
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1
Fluid Motion Model
R-25 SC
Hull Identification Number
FMLR2513J112
Vessel Name
Calypso
I’m looking for a replacement lock nut for the shaft coupling for my R25SC.

Can anyone give me specs on this? Such as part number, size & pitch, material, shaft manufacturer, etc.

I have a 1-1/4 inch shaft. This is the large nut that threads onto the shaft to hold the coupling in place.
 
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