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  1. R

    115 mercury

    Some of the 4 cylinder Mercury motors only run on the top 2 cylinders below about 1800 RPM.-----The bottom 2 carburetors kick in at around 1800 RPM.-----No fuel for ignition on bottom 2 cylinders.-----Spark is there all the time.--
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    115 mercury

    A switch box is about $300 or so.-----What trouble shooting has been done ?
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    Evinrude 8hp lower unit seals

    Post #5 says-----pure water comes out before any water----?????
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    Evinrude 8hp lower unit seals

    Water would come out before the oil.
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    Evinrude 8hp lower unit seals

    Yes it is.-----If you research / understand the basics of 2 stroke operation you would find out.----Some gasoline and oil goes right through the motor.----Does nothing inside the motor.-----Collects in your test bucket.
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    1974 Johnson 25 hp backfire issue and other

    I could rebuild your entire motor without glancing at a manual and I have many years of simple trouble shooting experience as well..----There could be lots of issues causing poor idle.----Worn out pistons / rings, weak spark, poor crankcase sealing, carburetor flooding, issues with low speed...
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    Evinrude 8hp lower unit seals

    Stop.------Is there any water in the gear oil ?-----Oil in the water may be normal, yes normal.----It is the nature of how a 2 stroke operates.-----I would not use the " mechanic in a can " approach here.-----First determine if you have an issue.-----Pressure test the gearcase to find...
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    Does this gear and clutch dog look ok?

    Good used clutch dog and gear may be available.-----You have to win the state lottery to buy new parts.-----The detent set up is for neutral.----And it loads up the linkages to get a quick shift out of neutral.----Of course a determined operator with a remote control can still damage these parts...
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    1974 Johnson 25 hp backfire issue and other

    The screw with the small arrow is tightened when I install a set of breaker points.-----Then the cam screw ( big arrow ) is used to set the points.----Started doing it this way at a dealer over 50 years ago.-----That is how I would do it tomorrow !!
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    1974 Johnson 25 hp backfire issue and other

    You do not loosen the screw that holds the points down.----On that Johnson the cam screw adjusts the points with that screw tight.----Learnt that over 50 years ago.---Fact is still true today
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    Thats not Santa on the roof!

    In many areas in Canada the roof structure is solid.------Allows for something called " snow loading " in winter.------2 feet of snow along with possible rain adds a huge load on the structure.-----Note that the bear appears to walk right onto roof from a pile of snow.
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    Does this gear and clutch dog look ok?

    Many clutch dogs today are marked and will only fit one way.-----We still do not know what motor this is.
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    Does this gear and clutch dog look ok?

    What motor is this ?-----And does the clutch dog have the spring and 2 balls ??----That detent was designed to hold it in neutral so it would snap into gear.-----The above easy shifting is one reason why the OMC motors used the hydro-electric shift for a few years , ( 1968 to 1972 ) they shifted...
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    1974 Johnson 25 hp backfire issue and other

    Kingfisher-----visit----leroysramblings-----There you can spend a few hrs and learn all about older ignition systems.----How they work and how to repair them.
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    1974 Johnson 25 hp backfire issue and other

    A 1974 model 25 HP has 2 sets of breaker points ( mechanical switches ) under the flywheel.-----They are set to open to about 0.020" maximum gap.
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    Evinrude 35514 broken choke solenoid

    There should be lots of those solenoids available used.-----Visit ---aomci-----E-bay-----
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    1978 Mercury 800 Controls, Cables, Throttle, Idle

    On a single lever , the control first shifts to forward.------No movement of the throttle cable at first.------You do have cables hooked up correctly ??-----Any pictures or video ?
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    1974 Johnson 25 hp backfire issue and other

    Some folks use the " it must be the coils " approach.-----Most start with the ---" it must be the carburetor " approach.----Simple trouble shooting finds the issues.
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    03 mercury 50hp 2stroke loss thrust

    Some outboard motors will sound great with 1 or 2 cylinders not working.---Some simple trouble shooting must be done.-
  20. R

    Mercury classic fifty 45 hp (1986-1989). Please help if possible-not running correctly

    Agreed.----revving that motor in neutral can cause issues.-----But sadly there is no way to convince people of that fact.----They will not believe it.
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