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Author Topic:   Identifying Outboard Engine
chuckt121 posted 09-21-2015 04:57 AM ET (US)   Profile for chuckt121   Send Email to chuckt121  
I bought an outboard engine from someone. He told me it was a Johnson 28-HP. The transom mount has been changed. There's nothing marked on the motor saying what the horsepower is. I need a shear pin for it. But I don't know any specifics about the motor. So that I can get the shear pin that I need, how would I find out just what model the outboard engine is? Any suggestions would be really appreciated. Thanks
Chuck T.
conch posted 09-21-2015 09:10 AM ET (US)     Profile for conch  Send Email to conch     
If your propeller shaft does not have splines and uses a drive pin, you may have a 1960-era 28-HP. Try drive pin # 0304575 from your Evinrude dealer or online.--Chuck
jimh posted 09-21-2015 10:33 AM ET (US)     Profile for jimh  Send Email to jimh     
Since you suspect the outboard engine is an OMC engine, take it to an experience OMC dealer. An experienced OMC dealer can likely recognize the model of the engine based on his experience.
contender posted 09-21-2015 01:55 PM ET (US)     Profile for contender  Send Email to contender     
Sounds like about a 1965/64 engine, I would try for parts. The other problem with the sheer pin is the prop its self, use to spin a lot of them on the hub and the pin was fine, I use to carry a spare prop, pin, plugs and plus the tools to do the change for these motors

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