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  1. R

    1976 115hp low to no spark

    A 50 year old motor.----Some will argue.----Step #1 is a compression test.----Post the actual values here.----Then test charge coil and sensor coils with your ohmmeter.
  2. R

    Reduced speed under load

    The motor appears to be a 1975 model.----There was no electric shift on 1975 models.----Make sure carburetors ( high speed jets ) are clean.----
  3. R

    Retaining ring on1975? Johnson

    OMC produced motors way after 1973 !----Post pictures.
  4. R

    Retaining ring on1975? Johnson

    Flat side is up.---Disregard the cutout section.
  5. R

    18 or 25? Anyway to tell?

    So you found a number as clearly stated there would be.----#72 was used on 25 HP models.
  6. R

    18 or 25? Anyway to tell?

    Way inside the float bowl.----Need to remove drain screw.---Then get it out and read the number.
  7. R

    Are these carbs interchangable?

    It was a 5.5 HP from 1954 to 1964.----That chart is WRONG.
  8. R

    Need help with 1972 9.5 HP Johnson gear shift rod adjustment

    Operate the shift lever.----See the parts that move up there.----Then look for the bolt that allows adjustment.
  9. R

    Throttle linkage

    Motor must be in gear to get full throttle.
  10. R

    18 or 25? Anyway to tell?

    High speed jets have a number on them.----Are you sure you were looking at the high speed jet ??
  11. R

    Need help with 1972 9.5 HP Johnson gear shift rod adjustment

    There is an adjustment for the shift function under the hood.----Fairly easy to see how that is done.
  12. R

    Need help with 1972 9.5 HP Johnson gear shift rod adjustment

    Could be an issue with the prop itself.----Is it a jerking feeling as if you hit a log?----I would take lower unit apart to inspect clutch dog.
  13. R

    18 or 25? Anyway to tell?

    Is there a round " welch " plug on the power head with model #
  14. R

    18 or 25? Anyway to tell?

    Any pictures?----Find / remove the high speed jet.-----What # is on it.
  15. R

    1959 Johnson 35hp Super Seahorse - Crankshaft Roller Bearing

    The roller bearing on a 1959 DOES NOT press onto the crankshaft.
  16. R

    Need Help I can’t get Johnson 55hp Motor to run right at all

    What does the spline on the end of the driveshaft look like ?----Full of rust?----If so the spline in the crank may be damaged / weak.---A potential failure point.
  17. R

    Harness to lift 9.8 4 stroke off and on transom while in yard

    West Marine will likely have something on the shelf.----Find a marine accessories catalogue or give them a call.
  18. R

    Evinrude big twin 40

    You need to have that thermostat assembly in there.----Your location ?
  19. R

    Need Help I can’t get Johnson 55hp Motor to run right at all

    In my opinion when you acquire a 50 year old motor you need to do a complete evaluation before spending any beer tokens.---Post actual compression values here.----If around 140 PSI ,look for and find a used lower unit.
  20. R

    Attempting a motor rebuild

    New rings on old pistons may be a mistake.
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