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  1. R

    Spark Plug Half-Fouling

    Fuel pump diaphragm should be checked.
  2. R

    1980 100hp vs 1986 110hp ignition coils

    I would want to see 125 PSI or so.----If a motor was here at 105 PSI it would like be in line for major work.----But perhaps you have a bad gauge.
  3. R

    Cooling problems

    Water pumps are damaged in very short time.----Good luck with your motor.
  4. R

    1980 100hp vs 1986 110hp ignition coils

    I started working on outboards in 1968.---Some issues are easy to solve on older motors.----Do yourself a favor and do a compression test on this motor.---Keep the actual values for future reference and post them here.
  5. R

    Cooling problems

    ???---2 minutes?----Might as well install a complete water pump kit.-----You ruined the pump housing and impeller !!
  6. R

    1980 100hp vs 1986 110hp ignition coils

    Coils are all the same from about 1979 to 98.----Also the same whether 6 HP or 300 HP.----Wires might be a little different and easy to adapt.
  7. R

    90 HP Mercury 2-stoke troubleshooting starter

    Charge the battery and have the battery LOAD TESTED first.----A 3 cylinder or inline 6 cylinder ?
  8. R

    Johnson LD-12A 5hp prop removal

    They just slide off where I am.----Used in salt water ??----If yes there could be corrosion.
  9. R

    Johnson LD-12A 5hp prop removal

    Prop is NOT available new from factory.
  10. R

    Johnson LD-12A 5hp prop removal

    That would be a left hand prop.----Not a common item.---The prop is NOT threaded.-----Your location ?.
  11. R

    1953 15 horse

    That part was used for about 40 years on many motors.----Dime a dozen at many salvage places.----Your location.
  12. R

    Need better hole shot

    Step #1 is to have the drive tested on a dynamometer.----Test power output of the motor.----Step #2 is to have boat weighed.
  13. R

    9.8 110 mercury wont throttle up anymore

    Sorry----I can not see , hear or touch your motor.----They are simple to trouble shoot and repair.
  14. R

    1971 Johnson 25hp Outboard - 25R71S

    The hole to the right of the word ---STOP----Is for the electric start plug.-----To me it appears that work has been done and motor is not factory original.-----Model # on the plate is ?----Picture of the plate ?
  15. R

    Starting an 57 Evinrude 7.5 fleet win after many many years of storage.

    Have you checked to see if spark will jump a gap of 1/4" or more on a test device ?-----It will need a new water pump impeller as well.
  16. R

    9.8 110 mercury wont throttle up anymore

    Motor may have overheated.----Many folks just do not know how critical it is to maintain these motors.-----There is nothing that warns you in case of overheat.----The motor runs until major damage is done.----Very simple to trouble shoot this motor.----Good luck with it.
  17. R

    9.8 110 mercury wont throttle up anymore

    Has a new water pump impeller been installed every 3 years ?---Check spark.----Might be running on 1 cylinder.-----If it has a plastic piece on top of carburetor , Is it cracked / broken ?-----Post the results of a compression test.
  18. R

    1971 Johnson 25hp Outboard - 25R71S

    Nope.----You need a puller with 3 bolts ( 1/4-20 ) to get the flywheel off.-----
  19. R

    How to disable quick start on 96 Johnson 150

    It is a 2 stroke and not a 4 stroke automotive engine.----You have to set aside automotive thinking.----Idle RPM is controlled with timing retard.----Throttle plate has calibrated opening because it needs to let a certain amount of fuel in.----That fuel has the oil to keep engine...
  20. R

    1983 7,5hp evinrude wont start

    Switch plug wires.
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