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Thread: Sport master prop nut kit.
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11-28-2016, 10:17 AM #1Member
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Sport master prop nut kit.
I've got a new sportmaster on a 300 xs. I have been testing props and the nut for the prop shaft is not as firm any longer. I went looking for the prop nut and washers on line and can't seem to find them readily available. Anyone know of an in stock source or a locally sourced substitute?
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11-28-2016, 12:31 PM #2
Part number is 12-840383A 2, any Merc dealer if not in stock should only be a day or so away. Fullers Marine will have in stock.
Dave1980 Cougar 19 tunnel,90 2.4L Bridgeport EFI in middle of restoration.
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79 12' Auminum, 95 Merc 9.9
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11-28-2016, 12:51 PM #3Member
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11-28-2016, 06:07 PM #4
can I ask exactly what do you mean by "the nut for the prop shaft is not as firm any longer" ?
do you mean its a locking nut and that the nylon is not gripping ? or is it a metal nut and you've rounded it off /
seems a strange thing to say that its not firm .
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11-28-2016, 10:13 PM #5Member
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11-29-2016, 05:30 PM #6
I bought a bag of 25 on ebay for $15.00 shipped. I'll look up the link
http://www.ebay.com/itm/3-4-16-Nylon...item4888f7f9adLast edited by wetsetmarine; 11-29-2016 at 05:37 PM.
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11-30-2016, 02:56 PM #7
ok now I understand about the not so firm bit.
plenty of better quality lock nuts around than mercury sell, even the normal nyloc are better.
I still think the old castle nuts cant be beat, a good nut would be a nyloc with a castellated top would be the best.
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11-30-2016, 05:24 PM #8
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Dave Strong liked this post
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11-30-2016, 06:37 PM #9
These are brass...and identical to Mercury! Thanks..I would never go stainless because of galling!
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12-01-2016, 07:52 AM #105000 RPM
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12-01-2016, 11:34 AM #11
I'm so confused...
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12-01-2016, 11:44 AM #12
Just take a dull chisel at the edge of the nylock area and dent it in.
Checkmate 2002 Convincor 270 496 MAG-HO
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05-11-2020, 10:08 PM #13
Any way to lock a prop nut on a small diameter prop hub?
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