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Hoping someone can assist with some vintage OMC part numbers…
Several years back I got 2 non-working, almost-identical engines: a ’59 Johnson Javelin and ’59 Gale Buccaneer. Both were in rough shape, but between the two, there were enough good parts to build one good engine. The issues were in the powerheads….both gear cases were in good shape.
The ’57 Johnson shaft has a thread-on prop nut; the ’59 Gale has the keyed + cotterpin nut arrangement. I used the Gale gearcase on the final engine, and it has worked flawlessly. The Johnson gearcase is a spare on the shelf.
First-world problem: I decided that I wanted both shafts to have the keyed + cotterpin type of prop nut, so I decided to change the shaft in the spare unit. All my research led me to shaft # 312867. Found one on eBay.. Today, with nothing else to do, I decided to swap the shafts. NOPE! Not happening. Hit an issue I hadn’t anticipated.
The 312867 shaft that I bought is dimensionally identical to the existing shaft in the Johnson gearcase (302522), but the splines are different!
312867…shaft I bought on eBay…23 splines
302522…shaft that’s in the Johnson…22 splines
Seems that I need a 22-spline shaft (or I could find a 23-spline dog). Does anyone know if OMC used (under any name, including Gale, MW, Viking, etc.) a 22-spline shaft with a keyed prop nut?
I could easily reassemble the Johnson gearcase & keep 2 types of prop nuts in my toolbag (like I said, this is a first-world problem), but if there’s a correct shaft, I’d use it. Any idea if what I’m looking for exists?
Thanks
EDIT: 305105 seems to be the 23-spline clutch dog for this eBay shaft, but will it engage the existing gears in the ’57 Johnson? Anyone know?
Thank you for your reply.
I apologize for the rough sketches, but the shafts seems to be identical, except for the splines (and the prop nut attachment).
Further research would seem to indicate that the switch to a 23-spline was 1958 for Johnson…I can buy a 23-spline dog, but will it properly engage the ’57 gears? Am I falling down a rabbit hole that I ought not go down?
Thank you for your reply.
I apologize for the rough sketches, but the shafts seems to be identical, except for the splines (and the prop nut attachment).
Further research would seem to indicate that the switch to a 23-spline was 1958 for Johnson…I can buy a 23-spline dog, but will it properly engage the ’57 gears? Am I falling down a rabbit hole that I ought not go down?
I think your assessment is correct. I also think your question about the dog fitting the gears is valid. But I don’t know the answer for sure. Yes there was a change in the outside diameter of the dog back around that time. Now the question becomes is it bigger or smaller? That, I don’t know without having the parts in front of me
I’m also now seeing that the clutch dog cradle changed from ’57 to ’58 as well. Leads me to believe that there were enough changes made that this may be a fool’s endeavor. I’m beginning to think that having 2 types of prop nuts is not such a bad thing!
What do you think? Keep working on this or leave well enough alone?
EDIT: On a semi-related note, would anyone by chance have a parts manual for a Gale 35DE11B (and/or 12B…I think they’re the same)? I have the exploded drawings, but I don’t have the corresponding part number lists. It might be worthwhile to see what pieces/parts are in the gearcase that I’m using now and see if there’s major similarities / differences / shared parts / etc.
Appreciated, but would really like the Gale parts book. OMC often used different numbers for the same parts, and since the Gale gearcse is the one I use, establishing a baseline for parts would be very helpful.
That said, it ‘appears’ that ’57 may have been the last year for the threaded prop nut. Subsequent years for Johnson & Evinrude seem to show the shaft as 305104 (which marineengine.com shows to be interchangeable with 312867…the shaft I bought on eBay). My 1959 Viking parts book shows that as well.
I noted that the gearcase housings are the same for ’57 Johnson as well as 58-59 Johnson & Evinrude…and 59-60 Viking, too…so it seems that whatever changes were made (splines, dogs & cradles for sure) seems to span the product lines, but still use the same gear casing.
I guess my mission now is to determine a.) what Gale used in ’59 and b.) if there were radical changes to the gears (dimensions and/or ratios). I suppose I could open up my Gale gearcase and do a side-by-side, but like I said before, this all represents a lot of work for a fairly-unimportant final outcome.
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