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Old 06-06-2012, 15:20   #1
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Join Date: Apr 2012
Location: SF Bay Area
Boat: Cheoy Lee Clipper 36 (Luders design)
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JS Transmission removal

Sorry I posted this by error as a reply.

I have a Westerbeke 42B with a JS gearbox. I'm trying to remove the gearbox (to replace) and it will not move back more than 1/2 inch from the bell housing. There are no clearance issues, nothing (hose, cables, etc.) keeping it from pulling out that I can see/feel. One source says it could be corrosion on the spline. I have worked on this for an hour so if there was any corrosion I should have worked passed it by now. Is it possible that the transmission and the bell housing have to be removed as a unit? I find this hard to believe but needed to ask the question. Anyone have a detailed exploded schematic of the JS. All the diagrams I have seen show the gearbox and bell housing as one unit.

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Old 11-06-2012, 11:43   #2
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Re: JS Transmission removal

My JS BW-7 came right off but to get it back on I had to remove the bell housing. It should slide right off the bell housing. There are roller bearings that ride in the cone on the bell housing. Did you spin one of the cones? I did fixed it and it spun after 500 hours so I replaced it with a PRM 120.
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removal, transmission

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