Topic: drain/fill/vent plug – Antique Outboard Motor Club,Inc

This topic has 8 replies, 5 voices, and was last updated 6 years, 3 months ago by sandpoint1.

Viewing 9 posts - 1 through 9 (of 9 total)

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January 23, 2018 at 8:17 pm #9060
sandpoint1
Participant
I have lost one of the drain, vent, fill plugs from the lower unit of my 1948 Johnson PO-15. I was wondering if anyone has an idea where I could pick one up. I think that this plug is a 5/16 coarse thread. Thanks.

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January 23, 2018 at 10:34 pm #70091
garry-in-michigan
Participant
Lifetime Member
❓ Is there a superseding part number for that plug ?
January 23, 2018 at 11:11 pm #70095
dave-bernard
Participant
US Member
I may be wrong But I think later OMC and Mercury will fit 5/16 coarse threads.
January 23, 2018 at 11:35 pm #70097
sandpoint1
Participant
The 21-63 in Gary’s part’s blow up is the plug; for sure. I have tried late model OMC plugs which are larger diameter. I will check out other year’s plugs and Merc plugs as well. Thanks for the help and ideas. I was thinking that a Member might have a plug in a tray somewhere…….
January 23, 2018 at 11:38 pm #70098
The Boat House
Participant
January 23, 2018 at 11:38 pm #70099
dave-bernard
Participant
US Member
If the head diameter is to large grind it down.
January 24, 2018 at 3:11 am #70105
sandpoint1
Participant
Great information. Thanks a lot; just what I needed.
January 25, 2018 at 1:08 am #70150
rmhxruss
Participant
21-64
21-212 these went obsolete in 1973 and 1974 with no new part number.
January 25, 2018 at 4:34 pm #70171
sandpoint1
Participant
There is an outboard salvage yard South of Mpls. I will try the obsolete number with them….
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