Topic: How do I find the year of my motor – Antique Outboard Motor Club,Inc

This topic has 10 replies, 6 voices, and was last updated 5 years, 9 months ago by Bob Wight.

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February 2, 2020 at 12:28 pm #193778
Anonymous
We have an old Johnson outboard motor. I have been trying to find information in it but cannot. The model # is PD-17 and the serial # is 249989. Any help would be greatly appreciated. Thank you
February 2, 2020 at 12:51 pm #193787
Buccaneer
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US Member
According to this Serial Number Chart, your 249989 number
makes your Johnson a 1936.
Regarding the Model PD-17, I’m guessing your not deciphering
that correctly. You don’t say how big a motor you have,
but there were PO model Johnsons, 22 horse power
in 1937.
Photos would tell the story.

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February 2, 2020 at 1:24 pm #193792
Anonymous
The motor does not say what hp it is anywhere. I’ll send a pic.
- This reply was modified 5 years, 9 months ago by Mumbles.
February 2, 2020 at 2:08 pm #193796
frankr
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That clearly is a RD-17, 1955 25hp. The “tail” on the R is not clearly stamped.

Likewise, look closely and there is a “1” preceding the serial number. True serial number is 1,249,989.
- This reply was modified 5 years, 9 months ago by frankr.
February 2, 2020 at 4:19 pm #193804
Buccaneer
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As they say, “A picture is worth a thousand words”!

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February 2, 2020 at 4:58 pm #193807
Anonymous
Thank you to everyone for their help! I also came up with a 1955 25 HP but I didn’t want to assume anything! Have a wonderful day!
February 3, 2020 at 2:14 am #193816
garry-in-michigan
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Lifetime Member
There was a service bulletin on this – Make sure the quarter inch hole in the lower front motor cover under the carburetor has been opened up to 2 inches. If it has a rubber elbow on the air silencer intake, it should be discarded.
February 3, 2020 at 8:39 am #193821
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Garry, I don’t remember the service bulletin when working on my RD-17E a couple of years ago,
but glad to see from my old photos that it had the “fix”.

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February 3, 2020 at 9:32 am #193825
olcah
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Further the intake silencer originally contained a perforated tube wrapped with fiberglass. That should also be removed.
February 3, 2020 at 11:58 am #193848
Buccaneer
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olcah wrote:

Further the intake silencer originally contained a perforated tube wrapped with fiberglass. That should also be removed.

That almost sounds familiar. What’s the issue with it?
All I know is that mine ran good last summer!

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