Help identify this Johnson OB (pics added)

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JMichael
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Joined: 19 Jan 2012, 07:44
Location: Northeast Arkansas

Help identify this Johnson OB (pics added)

Post by JMichael » 04 May 2013, 23:21

A buddy just returned from an auction today with a boat, motor, and trailer in tow. As it turns out, the Johnson motor is missing the model/serial plate. Is there any way to identify the motor with just the serial. The serial from the freeze plug is E3435191. Just guessing, I'd say it looks to be a 20-25hp motor from the late 70's to early 80's but that's just guessing on my part. Can anyone help identify this motor. Thanks.
Last edited by JMichael on 07 May 2013, 20:25, edited 1 time in total.

RazorBaits
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Charger25
Posts: 457
Joined: 31 Jul 2012, 08:01
Location: Aylett,Va.

Help identify this Johnson OB

Post by Charger25 » 05 May 2013, 10:23

:postpics:

Some pics of it might help
12ft ryancraft w/ 8 hp Frankenstein rude
14 ft fisher w/ 15 hp rude
16 ft lowe w/ 25 hp Frankenstein rude
9.9 Rude / sleeper
6 hp Evinrude Sail Master

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muskiemike12
Posts: 553
Joined: 16 Feb 2011, 10:17
Location: Aitkin, Minnesota

Help identify this Johnson OB

Post by muskiemike12 » 05 May 2013, 10:50

Missing serial # = stolen motor.

JMichael
Posts: 2926
Joined: 19 Jan 2012, 07:44
Location: Northeast Arkansas

Help identify this Johnson OB

Post by JMichael » 05 May 2013, 23:33

I'll get some pics and post them the next time I go out to his house but that may be a few days from now.
muskiemike12 wrote:Missing serial # = stolen motor.
The serial # isn't missing, I already posted it. What's missing is the model # plate. And whatever past this boat/motor/trailer may have experienced, it's current status is that it was legally acquired via a licensed state auction with a valid bill of sale and a current state registration/license.

JMichael
Posts: 2926
Joined: 19 Jan 2012, 07:44
Location: Northeast Arkansas

Help identify this Johnson OB

Post by JMichael » 07 May 2013, 20:24

Here are pics I took of the motor today.

Image
Image
Image
Image

BoatingCop
Posts: 59
Joined: 06 Jun 2011, 11:34
Location: Smithville, TX

Help identify this Johnson OB (pics added)

Post by BoatingCop » 07 May 2013, 21:30

It's a early 70's model for sure. It could be a 20-25 hp, but it looks very similar to the '73 40 hp Johnson I used to have.
1959 ??? 14' semi V, 1983 9.9 Evinrude

1960 Brewster 14' flatbottom, 1985 9.9 Johnson tiller-Burned in wildfires 9/4/11

nccatfisher
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Joined: 04 Feb 2013, 22:11

Help identify this Johnson OB (pics added)

Post by nccatfisher » 07 May 2013, 22:24

I believe it is a 20 or a 25 also, very early 70's. Don't think it is any larger with it having a single carb.

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tnriverluver
Posts: 315
Joined: 29 Jun 2012, 20:29

Help identify this Johnson OB (pics added)

Post by tnriverluver » 07 May 2013, 22:28

Pretty much identical to my 75 25hp evinrude. It is either a 20 or 25. My guess would be 25 just because they are much more common.

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Charger25
Posts: 457
Joined: 31 Jul 2012, 08:01
Location: Aylett,Va.

Help identify this Johnson OB (pics added)

Post by Charger25 » 08 May 2013, 02:58

I agree, early to mid 70's could be an 18 to 25hp. I "think" they all used the same block
12ft ryancraft w/ 8 hp Frankenstein rude
14 ft fisher w/ 15 hp rude
16 ft lowe w/ 25 hp Frankenstein rude
9.9 Rude / sleeper
6 hp Evinrude Sail Master

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alanbird_87
Posts: 99
Joined: 18 Mar 2010, 20:27
Location: Pembroke, NC

Help identify this Johnson OB (pics added)

Post by alanbird_87 » 08 May 2013, 09:08

In the third picture on the powerhead, there is a silver/grey circular plate right above your fuel pump. Your serial number could be engraved into that plate, mine was. Write that number down and search it online. Maybe boats.net or marineengine.com. That should tell you what motor it is.

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alanbird_87
Posts: 99
Joined: 18 Mar 2010, 20:27
Location: Pembroke, NC

Help identify this Johnson OB (pics added)

Post by alanbird_87 » 08 May 2013, 09:16

Sorry I posted that before I knew what a freeze plug was..lol #-o

JMichael
Posts: 2926
Joined: 19 Jan 2012, 07:44
Location: Northeast Arkansas

Help identify this Johnson OB (pics added)

Post by JMichael » 08 May 2013, 22:19

Does anyone know of a way to determine whether it's a 20 or a 25hp? Something other than taking the whole motor apart preferably.

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