When I was working on the outdrives for my boat this past spring, the
Mercury service manual said to replace the nylocks after removal. I checked
at the boat dealer - $2 each!!! I only needed 20 for two outdrives... Hah, I
went to the discount hardware stores. None of them had 7/16 fine thread
nylocks! Used the old ones over again. Just pulled and winterized the boat
yesterday - the outdrives didn't fall apart. Guess I'm just lucky.
Actually, I knew that if you couldn't turn them with your fingers, they were
still OK.
Kent
1960 Bugeye
1989 Baha Cruisers 280 XLE
Subject: Re: Another nut(ty) question
> In a message dated 10/22/01 4:47:35 PM Pacific Daylight Time,
> eddie_sheffield@yahoo.com writes:
>
> << Anyway, I know you really aren't supposed to reuse nylocks, but what
about
> these? They seem to be very snug still. If not (and I'm usually inclined
to
> replace all hardware like this anyway) are nylock nuts a suitable
> substitute?
> Or standard nuts plus lock washers? >>
>
> Eddie
>
> Well, not so, regarding reusing self-locking "Nyloc" nuts, according to
the
> Austin Service Journal, dated September 20, 1954. Quote:
>
> "QUALITIES OF ENDURANCE-Six Nyloc nuts were screwed completely on and off
a
> standard 1/4" B.S.F.bolt 30 times and the final average torque was 2,100
> lb.in. In addition a nut was repeatedly assembled on the bolt and after
400
> removals, the torque figure was 1 lb.in. This compares very favourably
with
> the Aircarft specification A.D. 114 requirements of .975 lb.in. torque
after
> only 30 removals."
>
> The bottom line according to this bulletin is, quote:
>
> "INSPECTION-If when reusing a Nyloc nut the nut becomes too stiff to turn
> with the fingers, after being screwed on the bolt up to the nylon insert,
and
> a spanner becomes necessary for further screwing down, then the nut is
> serviceable. If the nut can be screwed past the nylon insert by finger
> pressure alone, then it has become damaged and must be replaced."
>
> Cheers
>
> Curt Arndt
> Carlsbad, Ca
> '55 BN1, '60 AN5
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