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    1975 15 hp Fouled plugs

    Ok, I rebuilt this '75 15 hp Johnson, and quite frankly I was a little shocked when I put it on the boat and it actually worked. Ran great for three days and then all of a sudden lost most of its power. I limped home and pulled the plugs and they were black and oily. I was using Champion L7J...
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    fuel pump or carb float?? 1975 15hp

    '75 15hp pull start Johnson. Put carb kit in and replaced slow speed needle after thoroughly cleaning carb. Engine idles OK, but when the power is advanced the motor will run for about 15 seconds but will then die. Neighbor who has go-kart experience says that it sounds like the engine is...
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    struggling with '75 15hp manual start

    The saga continues. Thought I was in the end-game of this rebuild but still struggling getting the motor to stay running. Motor will turn over and run for about 15 -20 seconds and then will just die. Have already replaced fuel pump, and rebuilt carb. Slow speed needle has been set in...
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    15hp carb slow speed needle bushing

    Rebuidling 15hp carb and trying to seat the new plastic low speed needle bushing. Need to know how far down the passage it is supposed to seat. Does it sit just below the idle needle retainer or all the way down at the bottom of the passage where the outlet to the chamber covered by the welch...
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    cleaning '1975 15hp carb

    Cleaning / Rebuilding '75 Johnson 15 hp carb. Have read to soak in solvent, warm soapy water, use carb spray, use wire strands. Can anyone point or provide step by step info on how I should go about cleaning and reparing this thing. This is my first time down this path so specifics step would...
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    '1975 15 hp carbeurator question

    Got my 15hp kicker running but seems to die at high RPMs and stall out at low rpms. Figure I need to clean and replace parts as required in the carb. All the posts talk about adjusting the slow speed needle, but my needle will not move without putting pliers on it. Is it supposed to be able to...
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    '1975 15hp carburater or fuel pump?

    All, making progress in saga to get '75 15hp manual start running after purchasing with no history. Got the ignition problem licked and tonight got it to run for about 30 secs. Excited to actually see it run, but then it died and would not restart. It obviously was not getting fuel so now...
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    '1975 15 hp johnson air silencer

    Recently bought johnson '75 15hp manual start. Motor does not have air silencer. Looking for advice about whether not having one impacts performance and if I should invest in a new one. Thanks
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    gas line won't stay on fuel body connection 1975 15hp

    Have a '75 15hp pull start. My gas line won't stay attached to the motor fuel connector. Gas will flow but the fuel line won't latch- little pull and it comes right off. the connector is brand new and will attach to the connector on the fule tank. Is there something i can do to make the fuel...
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    compression for pull start '1975 15 hp

    Rebuilding '75 Johnson 15hp pull start that I have never seen run. Rebuilt ignition and got good spark and decided to check compression before putting everything back together. only got 40 psi on both cylinders. Heard should be around 90-100. Is there any difference between the compression...
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    ignition component testing with voltmeter?

    I have a '75 15 HP Johnson that is only firing on one cylinder. Swapped leads to the coils and the problem followed to the other cylinder. Suspect bad driver coil, condenser or point. Is there a way to check the integrity of these components with a simple voltmeter. Maintenance manual walks...
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    Johnson 1975 15hp flywheel removal

    Looking for help getting the flywheel off a '75 15hp johnson. Need to get the bolt off but don't have a flywheel holder. Is there a trick to holding the fly wheel without the tool in the maintenance manual.? Thanks in advance!
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    15R75C no spark

    I have a Johnson 15R75C that is not sparking on one cylinder. What is the best way to trouble shoot whether I have a coil problem, a wire problem or kill swithc issue?
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    Sears Wizard 1971 75hpwater or air cooled

    "Got a pretty basic outboard w "Got a pretty basic outboard with a jon boat I just bought. Was told it is a 7.5 hp Sears (wizard) outboard. Put it in a bucket and the motor ran fine. Never saw any water coem out of two ports have way up the shaft- only exhaust. Any way to tell if this is a...
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