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  1. R

    Stuck at MAX revs 2000 50HP Johnson

    Checked flywheel key ?--
  2. R

    Star Board are running hot

    Sorry----I do not know what----" much hotter " ----Means here.-----The coils / wires are on correct for the 2 & 4 cylinders ?----What happens when you pull #2 plug wire off at idle.----What happens when you pull #4 off at idle ?
  3. R

    60 DEGREE vapor seperator function?

    I do not believe the carbureted 60 degree motors have a ---" fuel return system "--- at all.-----And the wee vapor pump just pulls vapor off the separator tank and puts it into the intake manifold.----The factory manual has a nice diagram with all components , hoses.----Shows how and where fuel...
  4. R

    carberator adjustment on 2007 15 hp 2 stroke

    Many outboards do not get a lot of use.---Winter , snow and ice are one reason here.----Just took apart a 1965 model Evinrude 6 HP.----Pistons measure original size.-----Rings still showed factory machining marking.----Barely broken in !!-----Trouble shooting should be done before deciding on...
  5. R

    Where to get decent, unbiased info about new outboard choices?

    The 1990 model 30 HP is a proven reliable motor.------Built basically the same from 1976 to 2005 I think.---So lots of used parts around.-----I would fix the issues with it and add electric start.----Find a $150 donor motor with every thing you need.
  6. R

    60 DEGREE vapor seperator function?

    I think the motors with carburetors have the vapor separator too.
  7. R

    carberator adjustment on 2007 15 hp 2 stroke

    Everybody picks on the carburetor it seems.----Did this rough running show up suddenly ? --What other trouble shooting has been done if any.----Carburetors do not suddenly go out of adjustment I say.
  8. R

    150 gt popping when cold

    Well----" everything rebuilt " ---can mean a lot of things.----Any more details ?
  9. R

    Intermittent "cough" during startup.

    When piston is at the bottom of the stroke the crankcase ( with fresh fuel ) is the OPEN to the exhaust and any fire in the exhaust manifold.
  10. R

    Mercury 500 Strange Ignition Problem?

    You say you have spark that jumps a gap of 1/2" on all coils.----That would make me think coils are all OK.----Remove bypass covers to look at pistons / rings on this motor.-----Or take boat for a spin with timing light hooked up to one lead at a time.---Observe the flashing light and look for...
  11. R

    Derating a 5 hp ( ca, 1995 model) to 4 hp

    Folks are confused about boats and motors etc , etc.----I remember the insurance agent asking me how fast my 30' sailboat could go with the motor. .----I said with the right conditions the sails could push it at double the speed of the motor.----Nothing but an amazed look from the agent.----Yes...
  12. R

    Derating a 5 hp ( ca, 1995 model) to 4 hp

    But there is wonderful information available to you.----At a certain pressure-Flow through a 1" diameter hole is 4X that of the flow through a 1/2 " diameter hole.-----Nature does not always work the way you think it does !!
  13. R

    Derating a 5 hp ( ca, 1995 model) to 4 hp

    Do what you like.------Perhaps look at characteristics / calculations of airflow through a hole and engine performance.-----There must be some tutorials on google.
  14. R

    Compression test low on BF100 honda mid 80s

    I doubt there is compression release on these Honda outboards.
  15. R

    Derating a 5 hp ( ca, 1995 model) to 4 hp

    Would you need a " permit " to indicate modifications to your motor ?------Then just take a piece of shim stock and make a plate behind the carburetor to reduce air flow.----The hole at 2/3 diameter of what it is now will do it.
  16. R

    1995 90HP Force Outboard Fuel Starvation

    You could run with a timing light to observe spark as you increase throttle.-------I do know that a 20 PSI difference in a modern motor indicates a problem !!-------But in the big picture a head gasket is cheap.----Take the head off and have a look in there.
  17. R

    1995 90HP Force Outboard Fuel Starvation

    Some will argue -----Those compression numbers indicate a problem , like a scored piston.-----Pull cylinder head to have a look.----You have installed a new impeller in water pump ?
  18. R

    Performance question

    Run it on a ---Marine dynamometer-----That will check true engine power output.
  19. R

    Tell me about my 1980 70hp Evinrude E70elcsa

    It has power trim and tilt.-----In shallow water you can raise the motor to clear the bottom of the river / lake !!
  20. R

    Johnson 115 v4 60 degree

    Post compression values.----And does spark jump a gap of 3/8" (1 cm ) on all leads ?
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