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    Yamaha Tach Signal

    It is just a variable AC frequency. Do you have a frequency setting on your multimeter? You should be able to detect a small AC voltage as well.
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    Tilt and trim alternative for 93 Yamaha 40hp

    Aftermarket. CMC comes to mind.
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    Yamaha 50 HP Idles to 3000

    Is the motor a two stroke or a four stroke model? If four stroke is it carburetted or fuel injected?
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    uanble to start sometimes

    Have you any idea what brand and model motor it is?
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    115 Yamaha Tachometer - Other functions?

    What tachometer type do you have? Is it a Yamaha brand? Is it analog needle and dial type, analog digital display type or is it digital digital display type?
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    2017 Yamaha F25....Is it NMEA AND/OR Yamaha Digital Gauge compatible?

    Without the complete model identity it is difficult to say. Why was nothing after the F25 not provided?
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    Is YDIS like mercury vessel view?

    From what little I know about Vessel View it is like Yamaha's Command Link. Something the operator uses. YDIS is for a technician that is trouble shooting a problem in a motor.
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    Is YDIS like mercury vessel view?

    It is no as in YDIS is not like Vessel View.
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    Is YDIS like mercury vessel view?

    No.
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    2003 Mercury 60ELPTEFI Oil Filter Part #

    Straight from the Mercury Marine Parts Catalog.
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    2014 Yamaha 115hp not enough amps to start motor

    From Yamaha
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    2014 Yamaha 115hp not enough amps to start motor

    Measure battery voltage at the battery while the motor is being cranked. What is it? Measure battery voltage at the starter motor solenoid while the motor is being cranked. What is it?
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    2014 Yamaha 115hp not enough amps to start motor

    Most all Yamaha four strokes use a transistorized ignition system. Battery voltage powers the ignition coil. Controlled by what Yamaha calls the ECU. Engine Control Unit. It switches off battery power to cause the coil to fire the plug. A relative few Yamaha four strokes, and a number of Yam...
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    2014 Yamaha 115hp not enough amps to start motor

    Yes. Battery power through the ignition coil results in the spark plug firing.
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    2014 Yamaha 115hp not enough amps to start motor

    Yes. Transistorized ignition system.
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    2002 115hp 2 Stroke Hard Starting Solved

    Great report. The oil control rod retainer and the choke link retainer I knew about. The corroded key failing to activate the choke switch resulted in an epiphany. Would never have thought of that in a million years.
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    Yamaha 9.9 4t lower unit

    In the future it would be helpful if the full model identity were to be posted. In your case, F9.9CMHL. Better still, the complete engine identity. The ID on the label that begins with the number 6. I have reviewed several Yamaha F9.9 service manuals. Can find no specifications for "radial...
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    Yamaha 9.9 4t lower unit

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    Yamaha 9.9 4t lower unit

    All Yamaha four stroke outboard motors are preceeded with either the letter F, the letter T or the letters FT. With other letters thrown is an needed.
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    Yamaha 9.9 4t lower unit

    Seems it would be 4s. I would guess that it is an F9.9 something or other.
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