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  1. R

    1983 Johnson V4 140 Low Compression

    I had already removed about 6 gallons of old fuel and rinsed out the tank while I was refurbing the seats and cleaning and polishing the hull. I still need to replace the fuel level sending unit as it doesn't work. I plan on replacing all the fuel line Tank to motor and new fuel filter again...
  2. R

    1983 Johnson V4 140 Low Compression

    Replaced the other 2 coils and wires, installed new plugs. Took the boat out this morning and it ran better than it has for me. Actually got her up on plane. We stopped and fished a while and upon restart, the motor acted like it was fuel starved. Low RPM, Sluggish, and I used the primer to...
  3. R

    Eliminating VRO on 1989 Johnson 120 HP to run Mixed gas.

    Are there any snags to eliminating the VRO pump and running mixed fuel on a 1989 Johnson 120Vro Motor?
  4. R

    1983 Johnson V4 140 Low Compression

    Replacing the other 2 coils, As soon as they get here,....
  5. R

    1983 Johnson V4 140 Low Compression

    Bookmarked and will see what I can see. Thank You BUNCHES!!
  6. R

    1983 Johnson V4 140 Low Compression

    What could cause lost spark on 2 cylinders? Being an old auto mechanic of the shade tree variety, I had an induction timing light and checked each wire, all were firing with one slightly intermittent. Previously I had no spark on 2 cylinders and replaced 2 coils and it did seem to improve...
  7. R

    1983 Johnson V4 140 Low Compression

    Autozone guage read from 115 to 122 psi. I will be returning the guage I bought. Now to figure out why she isn't running good on the water.
  8. R

    1983 Johnson V4 140 Low Compression

    Thank You Berdink, My gauge was off by 30 psi.
  9. R

    1983 Johnson V4 140 Low Compression

    Heading to Autozone to get a compression guage.
  10. R

    1983 Johnson V4 140 Low Compression

    I just acquired an abandoned Bass Boat with a Johnson 120hp on it. I got the motor to start, gonna check it out as a possible replacement for the 140. would rather have the 140 but 20 hp isn't that big of difference. Hopefully it is in better shape.
  11. R

    1983 Johnson V4 140 Low Compression

    I will Try that, Doesn't cost anything to try.
  12. R

    1983 Johnson V4 140 Low Compression

    Just bought the boat in March, Spent time restoring it, Motor sounds great on a hose but not so much when on the water. Brand new compression gauge. Rebuilt the Carburetors. The boat had set for 8 years. Wishing I had an air conditioned shop to work on it in right now.
  13. R

    1983 Johnson V4 140 Low Compression

    I have low compression on all 4 cylinders 82-89 PSI. I am assuming I need the power head rebuilt unless anyone has a suggestion to get the old girl back up and running. This is a project boat for me, the wife and our service dog to go cruising in. Too old for waterskiing...LOL. This is on a...
  14. R

    Johnson 140 Trim motor not working

    Figured it out.. bad connection.
  15. R

    Johnson 140 Trim motor not working

    Here is another Johnson 140 with tilt/trim problems. This is a 1983 Motor. was working. I disconnected the leads to replace a transom boot and up and down worked following the re-installation. then stopped working and could hear a slight click when switch was pressed. Jumped the motor...
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