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  1. R

    Dies in gear

    ???----There are no mixture adjustment screws on these 1979 carburetors !
  2. R

    Mercury thunderbolt 500

    Not sure if serial # used in Australia is listed on maxrules.
  3. R

    Surging Mercury (with audio)

    Try a different style of plug.
  4. R

    Mercury thunderbolt 500

    Post a picture of this motor.----What is the serial # on it?
  5. R

    Opinion on 1963 Evinrude 28 H.P.

    So it was a home for some mice for a while.----It is running rough.----A good example of that motor can run smoother in my opinion.
  6. R

    Upgrading mercury outboard help!

    If there is no Mercury dealer to help you , then maybe it is not the correct motor for you ?
  7. R

    1991 mercury starting issue

    Checked the flywheel key ?----Did this issue develop[ suddenly?
  8. R

    Dies in gear

    I doubt you will find any mixture adjustment screws on those carburetors--There are no mixture adjusting screws !!------Checked the flywheel key?----All wires from CDI box going to the correct coil ?------Checked the reed valves ?
  9. R

    Transom help

    And how many holes are there just waiting to show themselves ?-----Best to remove the plywood for inspection I say.
  10. R

    Mystery Bolt and New Gasket?

    Replacing the head gasket on a motor like that is a simple job.-----Just 22 bolts.----Refinish ( flatten ) the warped head.----Replace rubber grommets on the poppit valves.----But if it is a salt water motor it might be a challenge.
  11. R

    Extending trim switch to engine cowel.

    There should be lots of those switches on the used market.----E-bay is likely a good source.-
  12. R

    Surging Mercury (with audio)

    Your motor is a simple " 2 stage , air processing machine"----Air is pulled into the crankcase.---Compressed and then transferred to the cylinder.-----It is then compressed again.----A spark fires off the compressed fuel air mixture.------So if there are internal leaks there is more time for...
  13. R

    Upgrading mercury outboard help!

    Did you buy an ---OPTIMAX ?
  14. R

    Mystery Bolt and New Gasket?

    I thinks he talked about replacing the head gasket.
  15. R

    Torque spec for thermostat cover for my 1974, 9.9 hp Johnson.

    The 1/4" bolts are always 60 / 80 INCH-LBS.
  16. R

    69 hydroelectric johnson 60hp. Starts in reverse.

    I believe all the motors 1968 to 1972 in the 55 to 125 HP used the anti reversing spring.
  17. R

    Surging Mercury (with audio)

    It sounds awful------Step #1 is a compression test.----Post the actual values here.----And does spark jump a gap of at least 3/8" on each lead ?
  18. R

    Need Help Identifying an OMC Lower Unit

    I have to agree with it being a Yamaha unit.----Looks to be 30 hp.----But could be 40 / 50 as well.
  19. R

    1995 90 HP Evinrude E90TLEO crossflow

    Keep those compression values for future reference.----Test once a season.-----I used to rebuild these motors on a regular bases.-----Simple / easy to maintain.-----Do not require $120+ / hr dealer support.
  20. R

    Why o' why?

    Have you drained the oil from the crankcase?---How much was in there ?-----Any water ?-----It is possible that the previous owner had no idea about motors.----Not uncommon today.----May have seen or heard that oil tank ( 2 stroke ) needs filled to the top.-----Did the same on this 4 stroke...
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