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  1. R

    2000 johnson 50 hp

    Those lower units are not robust in my opinion.----Gears often strip teeth !-----A unit from a 2 cylinder 40 / 48 / 50 model year 1993 and newer will fit.
  2. R

    Wondering

    The 2 cylinder 50 HP is not the same lower unit.----Will not fit.
  3. R

    96' Johnson will rev up in neutral but only 2500rpm in gear.. No power, need help

    It will run to 6000 RPM on 4 of 6 cylinders so it proves nothing.----Does spark jump a gap of 3/8" or more on all leads ?-----Are all wires going to the correct coils ?----How did it run for you last season ?----A Johnson or Mercury ?-----Posted in Mercury forum.
  4. R

    1997 35HP Johnson won't idle...needs rich/lean screw adjustment.

    So what do cylinder walls look like ?
  5. R

    1986 Johnson 9.9 J10RCDB main jet

    The opening of that nozzle is right in the center of the VENTURI.-----When air rushes through a venturi the pressure drops.-----Then atmospheric pressure acts on the fuel in the float chamber.-----The fuel is then metered into the airstream via a calibrated hole in the high speed jet.
  6. R

    1991 ?? Mercury Force - Fuel streaming from prop while priming

    I would say you need to look at the fuel pump.----From a 1000 miles away I think there is a ruptured diaphragm.----Easy fix here.
  7. R

    2004 225 oil injector issue

    Nope-----You have to take the identification ( co-efficient ) of each injector.----Then you have to match each one with the ECU so that correct amount of fuel is injected.----So yes you can replace just one.----It is just not as simple as installing a sparkplug !
  8. R

    Any way to change just one piston and rings on 1988 Mercury 115 L6 2 stroke?

    I clearly stated that there is no cylinder head and intended to tell you that piston can not come out the head area.
  9. R

    Cause of this milky water

    Your 2 stroke motor continually changes it's own oil.----Runs with clean oil all the time.----Some oil and gas goes right through the motor an never does anything.----This is what you are seeing.----And it is common on 2 stroke outboards.-----Lower unit oil does not get near that...
  10. R

    Any way to change just one piston and rings on 1988 Mercury 115 L6 2 stroke?

    Nope----There is no cylinder head on this motor !
  11. R

    Any way to change just one piston and rings on 1988 Mercury 115 L6 2 stroke?

    Stop-----Inspect and measure before making decisions.-----Honing a cylinder to break the glaze rarely changes the size by much.-----Standard rings can then be re-used if ring gaps are good.----Boring a cylinder O/S means new pistons and O/S rings.----Rings are expensive and kits are available...
  12. R

    Reed Valvè Adjustment 1977 Johnson 70

    A compression tester in the sparkplug hole can NOT FIND reed valve problems.----Reed valves have nothing to do with compression in the cylinder !!
  13. R

    Reed Valvè Adjustment 1977 Johnson 70

    You motor has 3 separate crankcases.-----Broken reed valves would mean that one cylinder is not working properly.---- That cylinder would lose crankcase compression.
  14. R

    Any way to change just one piston and rings on 1988 Mercury 115 L6 2 stroke?

    They are the sealing grooves on the 3 reed blocks.------Found way inside around the crankshaft.----They collect oil and separate the 6 crankcases in this 2 stroke motor.----If crankcase compression leaks between cylinders then they just wont start and idle well.
  15. R

    Any way to change just one piston and rings on 1988 Mercury 115 L6 2 stroke?

    I have seen 2 ring pistons and 3 ring pistons mixed.----But you should do a complete inspection / measurement of bores.-----Inspection of labarynth seals before ordering any parts !!
  16. R

    20hp 4 stroke only runs with choke on.

    Clean the carburetor again.
  17. R

    1964 Merc 650 cylinder block-stripped spark plug thread

    The repair can be done without removing the block.------Just use grease on the tools to keep chips from entering the cylinder.
  18. R

    Any way to change just one piston and rings on 1988 Mercury 115 L6 2 stroke?

    Crank has to come out to remove the piston.-----Replacing one piston is common practice.-----But do a complete inspection once motor is apart.----Lower crankshaft seals must be replaced as well.
  19. R

    Older Johnson Outboard Exhaust Plate Warp Issue

    Used plates might not be hard to find.-----Your location ?
  20. R

    Johnson 14spl fuel starvation

    This model " 14 " HP is nothing special at all.-----It is the same powerhead as the 9.9 / 15 HP family.-----Built with an adapter to use the older 20 / 25 midsections.----They likely had a warehouse full of those midsections to get rid of with some marketing !!-----Check / inspect carburetor and...
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