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  1. R

    Evinrude 15 hp no compression

    The cylinder head will be warped.( they all are ) so resurface it on a piece of glass with emery paper.--Install new thermostat.----Give the motor a try.----Hopefully it will run nicely.
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    1976 Johnson 115 Rebuild/Upgrade Help

    Fairly obvious that it is a 1976 model 115 HP.-----Find yourself a 1974 to 1976 model 135 HP donor motor.---Rebuild it with WISECO pistons.---Better / less gas consumption is just not going to happen.-----A simple and rugged motor.----I skied many miles behind a 115 HP 1974 model back in the...
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    Backfire from exhaust

    Start by opening your tool box.----Take cylinder head off.---Could be a blown head gasket.
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    Backfire from exhaust

    Time to take it to a shop to get it fixed I think.
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    1967 Johnson 6hp won’t idle or stay running

    There is only a low speed mixture adjustment.----Check the thermostat.----They often stick open.----And replace that impeller !
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    88 Special Carbs

    The high speed jet ( orifice plug ) is in the bottom of the float bowl.----There are 4 of them in total on your motor----They are about 5/8" long.----They must be clean.---Also post compression numbers .---These motors have a history of broken piston rings.
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    1975 25hp Evinrude Overheating

    Takes just minutes to change the grommet as stated clearly.----You do not have to remove the power head to change the grommet !!---I believe the upper and lower grommets are the same.----I believe the exhaust housing has 2 wee holes where the grommet is held.----Use those 2 holes to push it out.
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    Help with tilt/trim motor

    Some of those use a thermal overload device and contacts might need cleaning.---Or if moisture got in the motor the upper bushing on armature might be stuck.----Nothing to lose, so take top cover of the motor.
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    Help with tilt/trim motor

    When was it used last ?
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    2013 Suzuki 15HP add charging Coil

    Did you look at the listing for magneto parts ?
  11. R

    Backfire from exhaust

    Pull cylinder head and inspect.----65 PSI indicates a problem.----Not going to get any better by itself.
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    1997 Johnson 90

    The red lever is for manually opening the primer valve.----For running the red lever should be in line with the primer valve body.----If red lever is in partially open position it clearly indicates a problem with carburetors.-----Stop running the motor and sort this out.
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    Port bank of engine = dirty; Starboard bank of engine = clean (internally).

    Optical ignition motors may work well with resistor type wires
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    Help with tilt/trim motor

    Your location ?----There might be 2 different motors used on those.-----Pictures ?----What is wrong with the motor ?----That motor is often submerged in water.-----Not hard to relocate that inside the boat.
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    1986 Mercury 115 tilt trim help needed

    Contact your local friendly Mercury shop.---They will help you.----So often folks can't fathom serial numbers and production years
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    1986 Mercury 115 tilt trim help needed

    ??----Clearly it comes up as a 1986 model.
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    1967 Johnson 6hp won’t idle or stay running

    If it has not been looked at for 20 years the coils are likely shot.----Pull the flywheel.---The fuel pump is easy to repair / inspect in my opinion.----Does motor keep running if you operate the manual pump ?
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    1987 johnson v4 110 cyl 4 not running

    Post the outcome when you have this motor sorted out.----Where did you apply the pressure on cylinder #4 crankcase ?---There are 4 separate crankcases.----Was piston at bottom of travel ?----This issue should be easy to figure out I say.----High speed jet ( orifice plug ) for # 4 cylinder is...
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    Carb for 1977 9.9

    Why would you need to replace a carburetor ?-----Clean it, it is easy.-----What other trouble shooting was done , if any ?
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    1975 25hp Evinrude Overheating

    That exhaust grommet is actually easy to replace !-----But if you say it is HARD then I can not help you.----Takes just minutes.----There is something wrong with this motor and in my opinion there is nothing on these fine motors that is hard to repair.-----It was built in a different era and...
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