Topic: Scott Atwater, 1958 10 hp, drive shaft pin? – Antique Outboard Motor Club,Inc

This topic has 12 replies, 8 voices, and was last updated 9 years, 7 months ago by jim-moffatt.

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April 25, 2015 at 2:47 am #1320
davidk
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US Member
I’m putting together a 1958 Scott. In the gear case, the parts diagram shows a pin for the retainer ring. There wasn’t one there when I took this gear case apart. The pin was also missing in a parts motor I have. I can’t find a source for a replacement, but it’s not clear to me why this pin is needed? That ring slides inside the upper gear. Who cares if it runs or not? Whoever engineered the motor must have thought it was a good idea. Any thoughts?

I hope you can see where the pin would go, on the left side of the photo
April 25, 2015 at 4:26 am #14701
Mumbles
Participant
Hey Dave, I’m pretty sure the pin locates the forward gear on the shaft by going thru the shaft and the inner retainer at the same time. Without it, the gear may climb the shaft or the shaft may spin inside the retainer? I know my ’56 has one in it and you can probably make one easy enough.
April 25, 2015 at 6:43 am #14707
frankr
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US Member
I may be wrong here, but doesn’t the retainer and pin prevent somebody from accidently pulling the drive shaft out?
April 25, 2015 at 7:26 am #14708
1946zephyr
Participant
Yes, you definitely are missing a pin. I see both gears are engaged to the shift dog. It’s unknown whether you can get one or not, but you can easily make one and drive it in. You will want one that fits tight in there, so it doesn’t disappear like the last one 😉
April 25, 2015 at 10:54 am #14711
frankr
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US Member
It MIGHT be a roll pin. Get one at Ace Hardware.
April 25, 2015 at 2:23 pm #14717
jeff-register
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US Member - 2 Years
You can get hardened pins of all sizes & widths at a good price. I use them for many different uses!
April 25, 2015 at 3:14 pm #14727
davidk
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US Member
Thanks for all the responses. Where do you get hardened pins?
April 25, 2015 at 3:19 pm #14729
davidk
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US Member
quote FrankR:

I may be wrong here, but doesn’t the retainer and pin prevent somebody from accidently pulling the drive shaft out?

If that’s the only risk, seems okay to go without. The roll pin is a good suggestion as well. Thanks.
April 25, 2015 at 3:38 pm #14731
RICHARD A. WHITE
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Lifetime Member
As I see that picture, without that pin, you not gonna be able to shift…..Am I looking at it wrong?

http://www.richardsoutboardtools.com
classicomctools@gmail.com
April 25, 2015 at 4:23 pm #14737
jim-moffatt
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US Member
That pin is a SOB to remove in an original engine (dont ask how I know). It is a steel pin 1/8" OD and just long enough to fit the collar. its purpose is to locate the drive shaft vertically so it doesnt ride up and down and foul the impeller drive pin. Any pin that is a tight fit like a 1/8 roll pin ground to correct length would work. I have used a 1/8" drill bit ground to length
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