Prop Shaft Seal question

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Re: Prop Shaft Seal question

Postby Wilfred » Thu Aug 16, 2018 12:47 pm

I need to repack the stuffing boxes on a 1984 28 Express, 11 ft beam, twin 318s
Have not done this before- looks very very tight to reach, esp since I am large
Any feedback from those with experience? How difficult to reach?
What packing material do you recommend ? Any concerns with graphite?
W. J. Brockman
1984 Marinette Express Bridge
Twin 318s 235 hp
Bolles Harbor, Michigan

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Joined: Thu Nov 08, 2018 11:53 pm
Location: Virginia

Re: Prop Shaft Seal question

Postby BobCav » Tue Nov 13, 2018 9:39 pm

Coastie, did you ever get the seal figured out? I just came across this video while researching what I may need to do for my soon-to-be boat. This company recommends 1" of compression and they say if that's not enough, add in 1/4" increments until the leak stops. Yours is likely similar, but worth checking out what the mfgr recommends. ... tall-video
Bob Cavalcante, SCPO USN (Ret.)
Gel coat is for ladies' fingernails!
1974 28' Express, Single 318
Currently being restored, eventually on Potomac and Chesapeake Bay
Follow my restoration on FB @ThisOldBoat at

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Re: Prop Shaft Seal question

Postby Busia » Tue Nov 13, 2018 10:32 pm

Doubt you have that kind of seal. Looks like a "dripless seal" . You should have a simple shaft seal with some packing. Any plumbing or marine store will have the packing and info. Hardest part is getting to it, but very simple technology. PM me if you have questions.--Ed
located in Ketchikan, Alaska. Gods country
32 foot Marinette express. (no fly bridge)
twin 350 Crusader (Chev 350) engines
1:1 Borg Warner velvet drive transmissions
Closed cooling (antifreeze in the engine)
Proud to be retired IBEW