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    Test propeller

    Test props were used by shops to test power output of the motor.----Used in a proper sized tank or with boat tied to the dock.-------One type for a V 6 could be used and a 200 HP could build more RPM than a 150 HP using the same test prop.-------Not a very common item as most good shops have...
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    1995 Johnson 115 OceanRunner trim motor (video)

    The thingy with the arm is the sending unit for trim gauge.----Cable is a ground.
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    1995 Johnson 115 OceanRunner trim motor (video)

    Is manual release tight ?----Seals / o-rings OK on manual release screw?
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    1975 Johnson 115 v4 won’t idle

    So have the battery charged and load tested.----Inspect battery cables.----Take starter apart for cleaning / inspection / new brushes ? / ohm test on armature.
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    1975 Johnson 115 v4 won’t idle

    Did you inspect the reed valves when carburetors were off the motor?----- Did you remove / clean the high speed jets in the carburetors ?----They are screwed into the very bottom of the float bowls.----Only 2 in each float bowl.---Brass and about 5/8" long with 1/4-20 thread.-----Called an...
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    1976 Starcraft Chieftain 18' OB - restomod

    Any pictures of these 2 Mercury 70 HP motors ?
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    Yamaha 40 HP (F40LA) New Water Impeller Still won't Pee Water

    Water in your tub must be 6" above the impeller.-----Maybe the tell tale hose is plugged.
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    Evinrude outboard year

    CT would make it a 1983 model.----Pictures ?
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    Idle / Slow speed timing advancement screw missing?

    Sorry ---You should post the actual compression values.-----After that other meaningful steps to take will follow.----Perhaps a cylinder sleeve has rotated.---That could be found with inspection camera or removing the cylinder head.----Do you install a new impeller every 5 years or so ?
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    94 Johnson venom 200 Bogging in forward

    Maximum timing advance is around 20 degrees.
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    Idle / Slow speed timing advancement screw missing?

    There is no adjusting screw on the PORT side of this motor.-----Starboard side is where you look.----These things do not go out of adjustment.----So what is your motor doing / not doing.----What trouble shooting can you do.-----Start with posting the actual compression test values.
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    1978 Johnson 85ML78C

    I have had better looking motors than that given to me.----Just parts is what it is.
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    Engine parts

    Yes ---I know that would be a 2 stroke !----Good luck with it.
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    Engine parts

    Model # of your motor ?-----Outline your starting procedure here.-----And are you pushing the key in while cranking it over to start.-----If motor cranks slow the spark will be weak.----So do you have a tested battery ?---Starter motor and cables in good condition ?
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    1978 Johnson 85ML78C

    Likely the best thing you can do with that abused motor.
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    Engine parts

    This site right here and others.----In Canada---evinrudeparts.ca----Or your local dealer.----Avoid using Amazon " really good deals ) as there have been issues.----Why do you feel you need carburetor kits ?-----What is your motor doing / not doing?----Post the actual results of a compression...
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    EXCESSIVE smoke…

    Well----The water pump impeller must be SUBMERGED as these pumps are not self priming.-----Launch the boat or get a bigger test bucket !
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    EXCESSIVE smoke…

    Motor running in a test bucket with water 6" above the impeller ?
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    battery charging issue has me stumped

    But post #2 suggests testing the battery.-----So here we are.
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    1975 Johnson 115 v4 won’t idle

    About 120 PSI or more.----Those gaskets have nothing to do with compression in the cylinders.----Does spark jump a gap of 7/16" on all 4 leads using a test device?
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