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  1. viciousfishes

    Motor running poorly

    Alright, Well I have a 1968 20 HP Johnson and it just started running pretty bad. It idles well right when I crank it up and will run great at full throttle for about 1 minute. After that it sounds like it wants to go back up to full power and then it just cuts back and goes really slow and...
  2. viciousfishes

    1968 20 hp Running Rough

    Hey guys, Whenever I take my boat out it cranks up the first try and it idles and runs flawlessly PROIR to me going to wide open throttle. Once I start going fast it runs perfectly but then Ill slow back down and it runs rough as hell. I have no idea what this could be. Maybe Im putting too...
  3. viciousfishes

    68' 20hp leaking gear oil

    Hey guys, Its been a while since I was on here last due to yall properly diagnosing my bad coil problem! Ive been on the water almost every day for a month but when I got the motor out last time I noticed that there was some oil on the ground leaking off the bottom of the motor. Its coming out...
  4. viciousfishes

    1989 20 hp Wont go slow (smoothly)

    Hey guys, It hasnt been a while since I was on here last but Ive run into my next problem. The motor runs perfect at wide open throttle but it has problems when I try to go slower. It sputters a lot and wont idle well either. Any suggestions?
  5. viciousfishes

    Lean/Rich knob

    Hey yall, I was wondering.. what is the rich/lean knob reffering to on my 68 20 hp johnson? Is it oil and fuel or air and fuel? Im trying to figure out what it does, if I play with the knob while its running it doesnt seem to make any difference? Is that bad? Thanks! Bradley
  6. viciousfishes

    Tachometer install 68 Johnson

    Hey yall, I thought it would be pretty cool to put a tachometer on the side console on my little jon boat. I was wondering what all I would need for this job and where to get the guages and stuff. Thanks in advance!
  7. viciousfishes

    Flywheel/ring gear

    Hey yall, I have a 20 hp 68 Johnson and I was just wondering... what is the point of the ring gear thats bolted onto the flywheel? I figured it was for if that motor if it was an electric start. Would there be any benefits to taking it off if I didnt need it?
  8. viciousfishes

    Fuel bulb tightness

    Hey guys, I have a 68 20 horse Johnson. Ive been having problems with power on my boat and now Im leaning towards the fuel pump. I have noticed when I'm runnig the boat the bulb doesnt stay "tight". It feels like it has a decent amount of slack in it and Im wondering how tight it should feel...
  9. viciousfishes

    How to change water pump impellor on 1968 Johnson 20 hp

    I need to change the impellor before this impellor makes me change motors. Its been pounded by the pluff mud and saltwater of Charlston and it miraculous that the impellor has lasted this long. Anybody know how hard of a job this is and what all do you have to take off? And has anybody else...
  10. viciousfishes

    1969 20 hp. ALMOST leavs me stranded

    Hey guys, I have a 68 20 hp johnson my grandpa gave to me and it was sitting in a barn for 30 years prior to him giving it to me. It used to run really well but recently its been suffering from sporatic power loss when its at full throttle. It never actually shut off though, it seems like its...
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