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  1. H

    1958 18hp seahorse sluggish

    I rebuilt the carb and put new spark plugs in my 1958 18hp seahorse about 1 month ago. The motor ran great for the first 3 time out. I took it out yesterday and the motor would not go any faster than trolling speed. I took it home and cleaned the spark plugs and made sure that they were...
  2. H

    Fair Price

    I am looking to sell my 1958 18 hp Johnson Seahorse. I live in Mountain Home, Arkansas. I have replaced the spark plugs, rebuilt the carborator, and done everything I know how and still can't get it running. I want to get on the water, so I am going to try and sell this one for an antique...
  3. H

    1958 18 h.p. Seahorse issues

    Well, I got my "new" motor running last night. I changed the lower unit lube, changed the spark plugs, cleaned the gas tank and tried to clean everything up on the the motor. I just ran it in nuetral in a trash can. It ran pretty good, but it would miss-a-beat or mis-fire every so 5 seconds or...
  4. H

    Confused with outboard

    Hello, My father recently gave me his old Johnson Seahorse motor. The serial number on it is FD-12. Everything that I have read has told me that this is a 18 h.p. motor, but the cover says that it is a 10 hp. Can anyone help me clear up the confusion? Is this a 18 h.p. or 10 h.p. motor...
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