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  1. R

    Mid to high speed miss.

    Charge battery.----Load test battery.----Take starter apart for cleaning.-----Ohm check on armature commutator to ground.-----Possibly new brushes.
  2. R

    Mercury Year 2000 75 h.p. 2 stroke 3 cyl.

    Start with a compression test , post the numbers.-----There should be no reason for spending beer tokens on new carburetors !-----Is oil injection in service / bypassed / oil output tested ?----Time to do some simple trouble shooting.
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    Missing model numbers

    Post some pictures of the cowling if original.----My guess is late 80's -----The Canadian plant closed in 1990 I believe.
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    1968 6 HP Evinrude need help

    Experience ??----I have about 10 of these motors.----Rebuild them blind folded !!
  5. R

    1988 Johnson GT 175 fuel starvation

    Inspect bottom carburetor.-----See post # 16 and test run.
  6. R

    1968 6 HP Evinrude need help

    Did it have the high speed fuel mixture kit installed ?-----It left the factory with a fixed high speed jet.----So does spark jump a gap of 1/4" or more on a test device , yes or no ?------Compression numbers seem high.-----Is the tip broken off the low speed needle ?-----A fairly common thing...
  7. R

    1988 Johnson GT 175 fuel starvation

    Have your assistant drive the boat.----Remove airbox cover.----Shine a STRONG flashlight into carburetor bores.----See / compare amount of fuel coming up the main nozzles for all cylinders.------See if it is a fuel issue at 3/4 throttle.----Oh----It will rev up in neutral on 4 of 6 cylinders so...
  8. R

    1979 1150 thunderbolt merc drive shaft

    ??----What drill bit are you planning to use ?
  9. R

    OMC 120HP suddenly backfiring when accelerating

    Some will argue.----I think you have a valve problem.
  10. R

    OMC 120HP suddenly backfiring when accelerating

    Remove valve cover.----Inspect valve rockers.----Check valve clearance.-------
  11. R

    1988 Johnson GT 175 fuel starvation

    Why of course those magnets have to do with making spark.----Stop trying to run this motor !!----Repair / replace the flywheel.
  12. R

    Cooling and compression quandary: 1982 Johnson 115hp Sea Horse

    Sounds like broken piston rings.----An oh so common failure.----Pull cylinder head on the low compression cylinders.----Should tell the story.---Lucky you if it is a blown head gasket.
  13. R

    Loss of power, won't plane

    Sounds like the CLASSIC broken piston ring issue.---Pull that cylinder head.----Lucky you if it is a blown head gasket.----Every one of these engines will suffer from broken piston rings.
  14. R

    1988 Johnson GT 175 fuel starvation

    There is no way you would see exhaust or a flame there !!----You would be seeing fresh fuel / air mixture coming out of the pulse limiter.
  15. R

    1979 1150 thunderbolt merc drive shaft

    ??----Just do what you think is best.----What type of drill bit do you plan to use on this bearing ?
  16. R

    1988 Johnson GT 175 fuel starvation

    There should not be any flames coming from the crankcase !-----A loose flywheel magnet is indeed a problem.----Pull the flywheel with a puller using 3 bolts.
  17. R

    1971 Johnson 60hp cdi box issue

    You have to take the flywheel of to find the distributor cap.----Work carefully as parts may be expensive.
  18. R

    1974 evinrude 50 hp 50473m

    Good luck with your trouble shooting.
  19. R

    1988 Johnson GT 175 fuel starvation

    Test run with another tank ?----With compression numbers like that on my gauges , your motor would be coming apart !---Perhaps remove the bypass cover on the 95 PSI cylinder to look at piston and rings.
  20. R

    1974 evinrude 50 hp 50473m

    Take starter apart for inspection , cleaning and ohm test.---Possibly new brushes.-----Charge and load test the battery.-----Now most folks will reply that there is no issue with these things.-----But little to no money spent to check these items !!
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