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    Spark

    Is it possible to have a week spark that causes hard starting and poor idleing and poor running at low end, but runs pretty descent at high rpm when able to keep running?
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    Spline wear

    When pulling lower unit on my 1985' 20hp I noticed some wear on the upper splines.Is this normal for an old engine?Or is this caused by hitting rocks etc...?
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    OMC Plastic fuel tank

    Have a OMC Durotank I think it's called from around 2000 that came with the boat I bought about 5 yrs ago and was wondering since I got it if these are supposed to build up pressure in them?The hoter out it is the more pressure.Thought these are vented somehow.I have been trying to read about...
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    Fuel filters

    Is it better or does it matter if a filter is installed on my line going up to my motor or up under cowling?I put one on my line going up to the motor for now since my 9.9hp has little room under the cowling,but my 25hp has plenty under cowling,but use same tank and line for both motors when...
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    Low speed adjustment

    At what point does the low speed screw/setting become a non factor?As you increase throttle position Can I Assume it still delivers fuel,but the high speed jet just makes up the difference it needs for increased rpms..Any insight is appreciated..
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    float adjustment on 9.9hp

    After installing float and I turn carb. right side up(float hanging down) what is the preferred position of it?I know the small tab on float can be bent accordingly.Just wondering if there is a set spec. for this or just eye ball it.I went from the old cork style to new style which is a bigger...
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    Thermostats in general

    I own two 80's Johnson motors and I can tell by the paint for sure that the one has never been removed the other I am not sure.After reading posts and info on the web what would be the easiest way to tell if it is not working short of just pulling it out?I read if you cannot hold your hand on it...
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    Carb. kit 9.9hp johsnon 1988

    Got the carb. kit and there is a tiny white plastic cone kinda looking thing in the bag.Don't have this in my carb. and my carb seems to have never had a kit in it.Has old cork style float and needle with rubber tip.What is that thing for?thanks
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    Torque spec 9.9hp 1988 johnson flywheel

    Pulled the flywheel and now I need to install/ torque it.Thought I read 40-45ftlbs was good?Feedback appreciated.
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    Carb. Cam roller 1988 15hp johnson

    Why would there not be a listing for the cam follower roller by itself starting in 1986?I see it is listed until 1985 as a separate item.Was the roller changed that year possibly?Guess I need the whole assy to get a roller?
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    Tuning motor in cold temps

    Would it be better to wait for warmer weather to try and tune my 20hp 1985 motor?I don't use it in the cold anyway and thought the cold could cause some issues and things may change in the warmer weather.
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    engine overheat damage

    Just wondering how long it takes to do damage to an outboard if the water pump goes out and is not noticed in time?Saw someone ruin theres at night due to weeds clogged intake screen and they did not notice it and blew engine.
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    throttle srart position 1985 20hp johnson

    New to me 20hp tiller rope start 1985.What is considered the start position on the throttle?Would this be where the decal has a "dot" and an arrow on either side or is that the idle position?.I had just got done reading the post on the starting procedure which was helpful in explaining how the...
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    johnson 1985 20hp and 25hp carb difference

    Can anyone tell me by looking at carb how I know one from the other.Should the venturi/throat be bigger like on my 9.9hp to 15hp canversion or is it just the jetting?thanks
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    primer on my 20hp rope start

    Have this new to me 1985 johnson 20hp with a primer instead of a choke on it and wonder how many times should this be pumped and should it be pushed all the way back in when starting or leave out part way till it starts?Will this vary by engine and condition.?
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    Kill switch on 85 20hp

    This has the stop button on face of motor.My 1988 9.9 has it on end of tiller with the dead mans kill teather.More convenient to shut motor off in a hury.Being I can go much faster now can the teather kill switch be added somehow somewhere?
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    gear box oil longevity 20hp johnson 1985

    If the motor is not run for many years, say 20, can the gear oil actually dry up or thicken up?Tried changing oil in old motor and barley any came out and it looked like molasses.Filled with new and took out and ran alittle and came back and drained again and it was black already.Filled again...
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    Steering leg greasing isssue johnson 1985 20hp

    Just bought a 1985 20hp johnson and it was not used for years suppposedly and grease on it was actually hard.I tried greasing the steering tube and did get new grease to come out the bottom around nylon bushing, but it should ooze out top bushing of steering if I am not mistaken but it does...
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    100:1 or 50:1

    Just got an 1985 20hp johnson that has sticker on engine that says mix fuel 100:1.Thought these used 50:1?Thanks
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    1984 50hp johnson

    I am trying to get this motor started after years of sitting in garage.Low hours on it,well maintained.No controls on it so had to jumper a battery to the starter to crank it.Has fuel to carbs and pulled plugs and grounded them to case and they spark when cranking, but can't get it to fire at...
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