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  1. R

    1994 mercury force 70hp

    Open low speed mixture screw (s ) about 1/8th turn at a time and test run.
  2. R

    1983 black max 150 running poor

    Start motor.----Pull one plug wire off at a time.-----Note the response of the motor.-----Report the results here.
  3. R

    '78 Johnson 75HP will not return to idle.

    Some of the 75 HP models used a 2 cylinder gearcase.----That is why there is a different gear ratio.
  4. R

    Evinrude 25 - Part Missing

    The motor looks like brand new.----Should be interesting thread on this when you get it running.
  5. R

    '78 Johnson 75HP will not return to idle.

    edited
  6. R

    '78 Johnson 75HP will not return to idle.

    Just asked the poster to clarify what he has.----Some folks may not be aware of the difference in lower units.----I agree the 2 cylinder lower units are not robust , not even strong enuff for the 50 HP motors.
  7. R

    Force 70 hp questions.

    The fuel in a carburetor bowl sees atmospheric pressure !-----Not fuel pressure from a fuel pump !
  8. R

    '78 Johnson 75HP will not return to idle.

    Does the 75 HP use the 15" gearcase or 20" ?
  9. R

    Control box powers everything off key?

    The motor wiring harness should not be used to power all that stuff.
  10. R

    Carb parts question

    Should be lots of those ( 70 & 75 HP ) on E-bay.-----
  11. R

    Cooling System Generic Info

    ???----Water is forced in by atmospheric pressure !!------Stick a clear plastic hose in the bath tub.------Suck on the hose.----It is atmospheric pressure that brings water up the hose..
  12. R

    Lower unit oil water??

    Best to run to your trusted dealer I think.
  13. R

    Cooling System Generic Info

    ???----Atmospheric pressure.
  14. R

    Lower unit oil water??

    It is so simple to pressure test these gearcases..-----So easy to make a pressure test device.----Had an Air Canada pilot here a while ago.-----Was making his own test device.----Nothing to it.
  15. R

    Cooling System Generic Info

    The pump is not self priming.-----Therefor the impeller must be submerged.-----When boat is moving the water is forced up to the impeller and the pump was primed on start up.-----
  16. R

    Lower unit oil water??

    Should be about 11 ounces.
  17. R

    Lower unit oil water??

    Put oil in a glass jar.----Let it sit for a week.-----How many ounces of oil drained out ?----An exact number.
  18. R

    Lower unit oil water??

    ??----Water sinks in oil.
  19. R

    Johnson 40hp VRO Float Switch

    I cannot think of a 1996 model 40 HP that uses the ECONOMIXER set-up.-----Note---- there is a VRO system.----An ECONOMIXER system.-----And ACCUMIX system.----Used on various models.
  20. R

    Trim Not Working

    model# ?-----Saltwater motor?
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