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    Determine counter engine

    What is the ID for the motor?
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    Replacing carburetor hoses with tygon ?

    If the motor is working fine why bother with replacing the hoses?
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    1990 4 hp yamaha 2 stroke

    Well, you are somewhat, sort of, wrong. Small motors with integral fuel tanks don't need a primer bulb. Except for if and when a VST is emptied, EFI two strokes and four strokes don't really need a primer bulb. Some folks choose to not have a primer bulb installed because it is one more thing...
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    Yamaha 40 MSHQ stroke looking for repair manual

    LIT-18616-00-69 https://www.simyamaha.com/searchresults.asp?Search=LIT-18616-00-69&Submit=
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    Update Yamaha to NMEA

    Find the other that told you that it will work with an adapter. Buy the adapter. Plug it all together.
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    Update Yamaha to NMEA

    You don't like the answer that Yamaha gave you. Yamaha USA I presume. All Yamaha USA can do is to tell you that motors prior to X should not have it and that motor Y, and subsequent to Y, should have it. Yamaha USA is not the motor maker. Yamaha Japan is the motor maker. Yamaha USA is just a...
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    Update Yamaha to NMEA

    Too bad the serial number of the motor is unknown.
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    Update Yamaha to NMEA

    Yamaha Command Link (NMEA 2000) was introduced in 2006 EFI four stroke and HPDI two stroke production year models. A 2005 model year motor was not supposed to have Command Link capability. But some still got it. Partially or in full. What are the numbers on your ECU? What is the part number of...
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    1988 Yamaha 2SG info needed

    Apparently there is no shift mechanism on that model. It starts, runs and stays in gear. Best be aiming forward when it starts. Reminds me of my dad's old Mercury tower of power. Crank it in forward and you are off. Crank it in reverse and you are off.
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    Filter for main 2 cycle oil resevoir

    Parts are listed in the parts book for the specific model motor.
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    Yamaha 115 V4 Salt Water Series Running very smokey

    Too bad the model of the motor is not known to you.
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    Yamaha 115 V4 Salt Water Series Running very smokey

    How the oil transfer system works, a simple system really, is the number one reason that wanna be master mechanics fail their test.
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    Yamaha 115 V4 Salt Water Series Running very smokey

    Tank is overfilled. In which case it drains into the intake system. Also, the link attachment mechanism is known to get old and break. In which case the oil pump will default to the maximum oil setting.
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    Yamaha 2 stroke gear drain screw torque

    Black gaskets don't seem similar at all. Appears to be a harder type of plastic.
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    Yamaha 2 stroke gear drain screw torque

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    2006 Yamaha F150 Head gasket

    Me neither. You will have to be crafty.
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    2006 Yamaha F150 Head gasket

    Camshaft bearings are on the other side of the head. Should not be affected. Unless I am missing something.
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    2006 Yamaha F150 Head gasket

    I would inspect the head for warpage per Yamaha's directions. If out of spec, you could have a few thou removed. In which case you might want to consider the use of a slightly thicker gasket.
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    70 Horse Yamaha Hydraulics

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    40elj flywheel removal

    I am not understanding your comment about the flywheel not being threaded for this installation of the puller assy bolts.
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