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    Stumped on how to fine tune idle jet on 15R75C Johnson

    I recently rebuilt the carb in my 15R75C Johnson. I did like it said in my shop manual to lightly seat the idle jet and back it out 1.5 turns. I then installed the idle screw knob back on with the arrow facing straight down, so I would have room to fine tune. Now I read on a web page that I...
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    How do I hook up a Tach on 15R75C Johnson.

    I was researching boat props and found out I have to use a tach to test my WOT to test the pitch of the blade, but I dont have a 2 cycle tach nor do I know where to hook it. Its not like my car where I have a green tach wire. lol
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    Confused about what Spark Plugs to use.

    My 15R75C says on the transom bracket to use Champion L7J plugs, but, in my Clymer manuel it says to use Champion UL81C and im finding that same recomendation on other web sites. So which do I use and is there a difference between the two???
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    Fuel pump problem.

    15R75C Model Johnson I can not keep the motor running unless I prime the bulb every 10-15sec. The gas tank vent is open, is this a good sign that my fuel pump is out?
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    15hp Johnson problem

    I have a 15R75C Model Johnson. I recently installed a new ignition tune-up kit on it cause it wasnt getting spark. I timed the points and now have great spark. This past weekend I launched the boat on the river I fish out of, the motor started normally and I let it Idle for a min. or two, but...
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    15hp Johnson problem

    I have a 15R75C Model Johnson. I recently installed a new ignition tune-up kit on it cause it wasnt getting spark. I timed the points and now have great spark. This past weekend I launched the boat on the river I fish out of, the motor started normally and I let it Idle for a min. or two, but...
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    Oil seal replacement

    I have a 15R75C and I am starting to get a little oil under the timeing plate. Do I have to take the Power Head apart to change this seal?
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    15hp afraid of lake

    Ok im a little stumped, I have a 75 johnson 15hp. It will start up and run great in the tank, But when I get it in the lake it takes me forever to get it started. It has all new everything in the ignition and carb. cleaned. What could cause this?
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    Play in tiller handle

    I have a 75 15hp johnson and I have about a half inch of tiller play before it actually engages throttle is there a way to fix that?
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    75 15hp Johnson Points to CDI Conversion?

    I was doing some research yeasterday on my 15hp Johnson and came across a web page that said there is a conversion kit that I can change my points over to CDI. Is that true and if so could someone point me in the right direction.
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    1975 15hp Johnson question

    I have a 75 15hp model 15R75C johnson. I have cleaned carb, put new NGK B7HS-10 plugs in, new ignition tune up kit, compression is 98 psi on both cyl. Need to know how to properly time the points. also has new key
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    1975 15hp Johnson timing problem.

    I have a 75 15hp model 15R75C johnson. I have cleaned carb, put new NGK B7HS-10 plugs in, new ignition tune up kit, compression is 98 psi on both cyl. Need to know how to properly time the points.
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