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    1961 5.5 hp Seahorse: Driveshaft mount to powerhead

    1961 Seahorse 5.5hp, in replacing the water pump impeller, the drive shaft which is mounted in a spline into the powerhead (engine) came out and it appears that up at the powerhead unit, the shaft was assembled by a retaining cap, spring, o-ring, washer and bushing. The bushing cracked in...
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    5.5hp Johonson Seahorse 1961 - Rated Compression

    Does anyone know where I can get the targeted compression pressure of this 1961 twin cylinder 5.5hp seahorse? I will conduct a compression check and am not sure of what the compression should be. Thanks.
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    5.5Hp 1961 SeaHorse -Water Pump Not Working

    I have a 1961 5.5HP Johnson Seahorse which, which upon the first start of the season this year immediately got very hot and was near steaming. It only ran for a minute or so before I turned it off. Upon teardown, I have gotten to the water pump and have found that the impeller is in good...
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