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  1. flyingscott

    1992 70hp Johnson - electrical issue - continued new

    Slow starter generally means bad ground. Look at where the battery ground is connected to the exhaust cover. If it uses the original extended stud that needs to be shiny clean. That is a weak spot on OMC motors. All connections need to be SHINY clean
  2. flyingscott

    Hooked up my battery with the wrong polarity

    Yup having inside motor parts become outside motor parts are the main issue.
  3. flyingscott

    1976 25hp Johnson ignition question

    Replace the points and condensers with factory replacements. Those ignition are notorious for burning up condensors.
  4. flyingscott

    Force 70 HP - Full throttle in reverse but underpowered in forward

    Well with 1 carb rules out over fueling. Pull the head.
  5. flyingscott

    Can trim pump be added to a 40hp that didn't come with it?

    Lower units are less than durable. And if it is in the 88-92 Era that is a 5 yr only lower.
  6. flyingscott

    Force 70 HP - Full throttle in reverse but underpowered in forward

    Your top cylinder has an issue. I would expect your spark to jump 7/16" gap. Is that a single carb motor?
  7. flyingscott

    Can trim pump be added to a 40hp that didn't come with it?

    Looks closer to an 88-91 model. Get a better pic of the tag as the model # will tell you exactly. That yr would have used an external TNT. Better to buy an aftermarket unit for it.
  8. flyingscott

    Force 70 HP - Full throttle in reverse but underpowered in forward

    Your motor is running on less than 3 cylinders. Your reverse test proves absolutely nothing.
  9. flyingscott

    Lowest compression you’d buy

    Well the buyer got a good deal. The electric start bracket was worth more than he paid for it. Those motors on the healthy side should be about 140 psi.
  10. flyingscott

    Does the switch box impact the rev limiter?

    The rev limiter should be set at about 5500. 5250 is the top rpm of the motor to prop for.
  11. flyingscott

    02 mercury no plane

    Check the fuel system, filters and VST if it has one. Then check spark make sure it jumps 7/16" air gap. Then get the factory nanual
  12. flyingscott

    fuel pump for Mercury 90 2 stroke?

    I would start with a compression. And spark test
  13. flyingscott

    Does the switch box impact the rev limiter?

    Do you have the factory manual for your motor? Pretty sure that motor can run without the Rev limiter attached.
  14. flyingscott

    1993 9.9 hp/15 hp power head to 1991 15 hp bad powerhead outboard.

    By the time you get done doing that you could buy a whole other motor. Look on Craigslist 9.9. Motors go for cheap
  15. flyingscott

    Does the switch box impact the rev limiter?

    Pretty sure only the jet models of that motor had a rev limiter and it was a separate module.
  16. flyingscott

    1993 9.9 hp/15 hp power head to 1991 15 hp bad powerhead outboard.

    No. Recoil and everything else are different. You need a 74-92 powerhead.
  17. flyingscott

    pull cord not returning.

    That will break again. Get a new spring.
  18. flyingscott

    1996 25hp mercury 2 stroke sea pro revving high

    Redo your link and sync with the manual
  19. flyingscott

    1996 25hp mercury 2 stroke sea pro revving high

    Pic #2 has your idle screw in it. Try turning that down have you done a compression test?
  20. flyingscott

    1996 25hp mercury 2 stroke sea pro revving high

    Put up a pic of the front of the motor. Why do you have 2 posts on this motor?
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