A PYI shaft coupling isolator makes engine alignment checking pretty easy. However, the couplings are made with an alignment cone that allows the bolts to be loose (finger tight) and for a gap of a few mils to be created. As you rotate the shaft the difference between each axis should be less than 3 mils. Using feeler gages measure the gap at one of the coupling bolts, rotate the shaft 90° and remeassure at the same bolt. Rotate another 90°, and remeasure. Do the final 90° and remeassure. Move the engine as needed to reduce the difference. Do the whole 360° again and repeat the adjustments until less than 3 mils difference. Getting to the coupling and the engine mounts is probably the hardest part, depending on boat design.
Josh Muckley S/V Sea Hawk 1989 C&C 37+ Solomons, MD On May 19, 2015 11:43 AM, "Dr. Mark Bodnar via CnC-List" < cnc-list@cnc-list.com> wrote: > > First sail/journey of the year. Bedford to Deep Cove in Mahoney Bay - > approx 50 nautical miles. > Left Bedford Yacht Club and motored out thru Halifax Barbour, around > Chebucto Head and through Samboro passage - minimal wind and dead on the > nose. > Quite pleased with motor overall. I replaced a broken engine mount and the > new one (a generic mount I modified to fit) was way better. Engine needs to > be re-aligned - hopefully that will decrease vibration even more. Advice > appreciated. I've read about it - difficult? > > On arrival my stuffing box was dripping a fair bit. Little more than 1 > drop per second > Tried to tighten but couldn't separate the 2 nuts. Sprayed a little PB > Blaster - but I'll need a second wrench to counter with rather than > spinning whole unit. > Any suggestions? Are locking pliers OK? > > Mark > > CS 30 Prosecco > > > > > _______________________________________________ > > Email address: > CnC-List@cnc-list.com > To change your list preferences, including unsubscribing -- go to the > bottom of page at: > http://cnc-list.com/mailman/listinfo/cnc-list_cnc-list.com > > >
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