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  1. R

    97 90Hp Johnson trim tilt

    Top up fluid level.------Or possibly a sticky valve assembly in hydraulic circuit.
  2. R

    97 90Hp Johnson trim tilt

    Test using the switch on the motor and also on the control box.-----Does the tilt motor operate both ways?----Explain exactly what is happening here !
  3. R

    Black scuff marks on cylinder walls

    Use a factory replacement gasket.---Best quality
  4. R

    Black scuff marks on cylinder walls

    Just run it and hope for the best.
  5. R

    Black scuff marks on cylinder walls

    There is nothing wrong with some black stuff on the top of the piston.
  6. R

    Black scuff marks on cylinder walls

    The way I see it.----This powerhead was rebuilt with 0.020" O/S pistons.----It failed again.-----Then it was taken apart again.---Cylinders were given a quick honing ( ball hone ? ) and assembled.----A ball hone might hide the score marks.-----After running the score marks show up...
  7. R

    Black scuff marks on cylinder walls

    Evidence suggests that this motor may have a lot of hours on it.-----What condition is the lower unit in?
  8. R

    Ruh-Roh… a new gear case may be in order

    There are GPS moving charts / maps available for less than $1000 that show your boat exactly where it is relative to land / islands / depth of water under the boat.----Nothing to it.-----I try to teach folks to trouble shoot before making expensive mistakes !-----You can find the charts online...
  9. R

    1975 evenrude cooling issue

    I think there is only 1 thermostat.----Checked head gaskets and water diverters ( deflectors ) in water jackets?
  10. R

    Golden Jubilee Evi Sportwin 10 - Should I convert?

    There is nothing wrong with the pressurized fuel tank concept.
  11. R

    Need help finding a test propeller for Johnson 90hp

    315983 is the one you want.
  12. R

    Ruh-Roh… a new gear case may be in order

    Gear ratio is different between a 1990 model and much newer motors.-----You have to be very careful when swapping newer parts into an older gearcase.----Model # on the motor that hit the rock.-----I tell folks that a GPS unit to tell you where the rocks might be is very cheap !!!
  13. R

    Golden Jubilee Evi Sportwin 10 - Should I convert?

    It is a passage way.----- The fresh air / fuel mix is compressed under the piston.-----It then flows into the cylinder via that passage way.----Please study the way that a simple 2 stroke works.
  14. R

    Need help finding a test propeller for Johnson 90hp

    What are the E-bay listing numbers that you have looked at?
  15. R

    Need help finding a test propeller for Johnson 90hp

    What are the issues with your motor?-----Most shops now use a dynamometer and test props are not easy to find.
  16. R

    Ruh-Roh… a new gear case may be in order

    Model # of this motor from your neighbor?
  17. R

    Black scuff marks on cylinder walls

    You should remove the 4 bypass comers to look at pistons / rings.----That might offer some clues.----Post pictures of pistons / rings through intake ports.----This would be the cooler side of the motor.---Damage is often worse on the exhaust side.----You have new gaskets.----Very simple to do...
  18. R

    Ruh-Roh… a new gear case may be in order

    The 3 cylinder models went to " fine spline " starting in 1989 model year.
  19. R

    Black scuff marks on cylinder walls

    How did it run for you last season.---That motor would come apart here for inspection.---There is damage to piston rings,----Unless it was a recent patch-up job.------Or you can run it and hope for the best.-----
  20. R

    1988 Johnson 30 hp not pumping water after water pump and thermostat change.

    Very well then.----I was not there to see if it was done correctly.----And I could NOT determine those facts from post #1.---Sorry.
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