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  1. J

    1975 Johnson 25 hp surging

    Have a 1975 Johnson 25HP model 25R75B, pull start, short shaft. I was having an issue where the motor would run fine at idle and whenever I would open up the throttle it would surge. If I pumped the primer bulb it would pick back up and run fine. It would not run at WOT. I could not pump the...
  2. J

    1975 Johnson 25 hp impeller problem

    Hello, new to this site. I recently inherited a 25 HP Johnson from my grandfather. The motor had not been run in about 8 years or so. I rebuilt the carb, changed the plugs, changed the lower unit oil and changed the fuel lines. Most recently I just got through replacing the impeller. In...
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