I’m getting set up to do the same thing and from my investigations and discussions with local marine mechanics, I’ve determined:
1) The coupling would be a tolerance fit. 2) Cutting the old coupling off is the quickest method .... and you should do that at the keyway to minimize the potential for scoring the shaft itself. Otherwise a plate made-up with the same bolt pattern as the coupling and a rachet socket placed between the plate and the coupling + bolts through the plate and coupling can be used to press the coupling off. 3) Regardless of how you take it off, replace the coupling and take the shaft and new coupling it to a machinist to have a fit-and-face done on it and the shaft checked for straightness. 4) Might as well plan on doing the cutlass bearing at the same time. An old coupling would not have a tight fit on the shaft and the shaft torque would be taken up only by the shaft key .... shear that and the shaft backs out of the stuffing box and then you’d get to test out how good your bilge pump is. Peter Fell Sidney, BC C&C 27 MkIII From: Dennis C. via CnC-List Sent: Friday, May 16, 2014 2:01 PM To: Graham Collins ; [email protected] Subject: Re: Stus-List removing prop shaft coupling - how? If all else fails, cut it in half and buy a new one. :) Dennis C. Touché 35-1 #83 Mandeville, LA Sent from my iPhone On May 16, 2014, at 3:36 PM, Graham Collins via CnC-List <[email protected]> wrote: I used a 3 arm puller, PB blaster, a blowtorch, and the largest wrench I could fit on the puller, with a pipe on that as an extension. I had a 12" adjustable wrench wedged in to keep the shaft from turning (the puller would have turned with it). The adjustable wrench now has a very impressive bend to it, and it took a fair bit of heat and force to get off. Hopefully yours isn't that difficult. And as Mainsail says in his blog, easiest way is to cut it off... if time is money, go that route. Graham Collins Secret Plans C&C 35-III #11On 2014-05-16 11:52 AM, Nate Flesness via CnC-List wrote: I need to replace the stuffing box hose. Boat (30-1) is on the hard and I have the new Buck Algonquin hose, new packing, new clamps. Anyone have advice re removal of the forward prop shaft coupling? It is disconnected from the transmission and I've pulled the prop shaft aft, so there is some clearance between the couplings. The pbase website suggests that these couplings may be press fit (as in machine shop press).... PB blaster applied, light taps with mallet do nothing so far, considering heating it with a torch....? Nate "Sarah Jean" 1980 30-1 Siskiwit Bay Marine Lake Superior (with floating ice chunks mid-May.....!) _______________________________________________ This List is provided by the C&C Photo Album Email address: [email protected] To change your list preferences, including unsubscribing -- go bottom of page at: http://cnc-list.com/mailman/listinfo/cnc-list_cnc-list.com _______________________________________________ This List is provided by the C&C Photo Album Email address: [email protected] To change your list preferences, including unsubscribing -- go bottom of page at: http://cnc-list.com/mailman/listinfo/cnc-list_cnc-list.com -------------------------------------------------------------------------------- _______________________________________________ This List is provided by the C&C Photo Album Email address: [email protected] To change your list preferences, including unsubscribing -- go bottom of page at: http://cnc-list.com/mailman/listinfo/cnc-list_cnc-list.com
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