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  1. K

    1979 Johnson 100hp carb adjustments

    Wondering if anyone knows the specs for the float adjustments for the carbs on a 1979 Johnson 100 hp? thanks kyle
  2. K

    1979 Johnson 100hp surges at WOT

    Having a random problem with my Johnson. When taking off across the lake it will start surging at full throttle, if I back it off to 3/4 it goes away and runs good. For example yesterday and the first 3 runs to different fishing spots it would surge and on the last run to the launch it was...
  3. K

    More power 1979 evinrude 100hp javelin

    I have a 1978 evinrude 100hp javelin on my 17’ ranger bass boat. It runs awesome and goes about 35-39 mph on the lake as I play with the trim. Compression on the engine is 134-135 on all cylinder. I would like to see top speed around 45-50 mph so I’m wondering if there is anything I can do...
  4. K

    1979 Johnson 100hp

    I have a 1979 Johnson javelin 100hp on my bass boat and the issue I’m having is at an idle the engine will stop peeing. If I rev it up it starts peeing and cools right down but if I leave it at an idle the over temp alarm goes off and I shut it down. I replaced the impeller and still same...
  5. K

    1989 Johnson gt150

    I got the engine running and now I am not peeing and water, I pulled the lower unit and the impeller looks good. I blew air through the tube that goes into the impeller housing and it's going out the pee hole however when it's running only smoky air comes out no water. I pulled the thermostat...
  6. K

    1989 Johnson got 150 spark issue

    Ok I got a good one, I have a 1989 Johnson gt150 that I just picked up to repower my boat. Issue is the engine doesn't have spark. If you remove the plugs from the cylinder head and hole the plug on a head bolt it has spark but when you put the plug back in the cylinder head the spark is gone...
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