Recent content by thosch

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    same model prop, different WOT RPM

    Bought a replacement prop for the '91 90hp Johnson, same brand and model number as old prop. Old prop turned 5900rpm at WOT, new prop turns 5800rpm. Is 100 rpm difference within acceptable +/-? Nothing else has changed.<br /><br />Not really worried, just didn't expect any difference.
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    sparkplug wires 90hp johnson

    Replaced plug wires on a '91 90hp Johnson, as they were original and I was having intermittent problems with one wire.<br /><br />When I got everything back together, I fired it up in the driveway and pulled each wire off the plug, as sort of a continuity test. The engine responded to each wire...
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    slop in steering wheel

    I have a 1990 Tracker Magna17 with drum steering in the console. Ever since I have owned the boat (6 years), there has been about three inches of play in the steering wheel. Can the play be adjusted out of it, or is this normal? Hasn't seemed to get any worse in the past six years.
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    more WOT rpm and prop selection

    1991 Johnson 90hp. on a 17.5ft Tracker deep-V alum. hull. Currently have a 2-piece 13.25x17 Hustler prop. With just me in the boat and no other cargo, I can get 5000rpm at WOT. With more people and some cargo, the best I can do is 4800rpm. I recently rebuilt the carbs, with no effect on rpm...
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    more WOT rpm and prop selection

    1991 Johnson 90hp. on a 17.5ft Tracker deep-V alum. hull. Currently have a 2-piece 13.25x17 Hustler prop. With just me in the boat and no other cargo, I can get 5000rpm at WOT. With more people and some cargo, the best I can do is 4800rpm. I recently rebuilt the carbs, with no effect on rpm...
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    missing thermostats

    1991 90hp Johnson. Have had it a couple of years. Doing maintenance this spring and found out it had no thermostats. Talked to the previous owner and he said the dealer's shop had removed them in 1994 while working on an overheat problem. The motor runs great, has 125lb compression in all...
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    90hp Johnson thermostats

    A couple of years ago, I bought a boat with a 1991 90hp Johson on it.<br /><br />I was doing maintenance on it this spring and decided to pull the thermostats<br />and take a look at them (age unknown). No thermostats present in the engine.<br />I called the previous owner and asked about this...
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    inline fuel filter

    I have a primer bulb that doesn't stay very firm. I have an inline filter after the primer bulb. When I bypass the filter, the primer bulb stays firm and I get a couple hundred more rpm at WOT. I installed a new filter and made sure connections were tight, but bulb again softens up. Is the...
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    steering lock on 91 johnson 90hp?

    When trailering, is there a way to lock the steering in the center position, rather than laying it to one side. This engine has tilt/trim and console steering. I can lock the motor in the trailering position except can't lock out left/right movement.
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    1991 johnson 90hp

    Recently bought a used boat with a 1991 Johnson 90hp outboard. The motors runs pretty good, but I have a few general questions. This is my first Johnson.<br /><br />The VRO was disconnected by the previous owner and a regular fuel pump installed. I took the cover off the fuel pump to check...
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