Re: Need help identifying Johnson seahorse from SN only


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Posted by Dan Tannehill (68.9.108.242) on September 12, 2005 at 21:15:34:

In Reply to: Need help identifying Johnson seahorse from SN only posted by Sean on September 12, 2005 at 18:28:06:

If that's the serial number, as I suspect it is, then the motor is from 1956. The biggest Johnson that year was the 30 horse RD-18 (also Electric start RDE-18 and Javelin RJE-18 deluxe model, all 30 hp) twin cylinder. The fat-4 Johnson was introduced in 1958 at 50 hp. It was later upgraded to 75 horse, but I can't find any 55 horse motor from that era.


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