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  1. markoc85

    no idle in water

    Hi, just wondering if anyone can give me a lead on this - my 1990 90hp Johnson has strange behaviour at idle. When flushing on the hose it idles fine without any throttle required. However when the boat is in the water it requires me to lift the throttle to avoid stalling. What is this caused...
  2. markoc85

    new reg/rect, no charge, no tacho!

    Hi, recently my tacho stopped working, and I was advised to check whether motor charged; it didn't, so as recommended I bought a brand new regulator/rectifier and installed it. But I still have no increase in battery voltage when motor is running, and my tacho still doesn't work!! Very...
  3. markoc85

    90hp flywheel torque

    Hi, I've tried looking all over thinking someone has probably asked this question before but no joy... Can anyone please tell me the flywheel nut torque spec for a Johnson 1990 v4 90hp?
  4. markoc85

    Tacho trouble 1990 Johnson 90hp

    Hi there, does anyone have any advice on troubleshooting my tachometer? It worked fine, then intermittently for a day, and now it doesn't work at all damnit! Any starts much appreciated!
  5. markoc85

    decarb caused black puddle!!

    Hi, two days ago I used a product called Yamaha Combustion Chamber Cleaner to de-carb my engine, a 1990 Johnson 90hp. I squirted the stuff in the throttle throats with the engine running on flush in my driveway. Then I let it sit for about an hour and a half before putting in the water and...
  6. markoc85

    90hp broken bolts

    Two of the bolts broke off when I removed my exhaust cover today to replace the gaskets. As you can see from the photo both have stubs poking out. I can get vice grips on each of them but they just slip on the stub when I twist. Does anyone have a good recipe for getting broken bolts out...
  7. markoc85

    1989 90hp water leak

    Hello, I just found this website and its awesome My outboard is leaking water somewhere just above the thermostat assembly. Its not the thermostat gaskets, its just above them. Would it be the exhaust adapter to powerhead gasket has failed? Or could it be exhaust gasket or exhaust cover...
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