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    Yamaha 703 control adjustment advice

    What is a Yamaha 25 HT model? Something is missing. Is it a T25XXX? What is lift part about? When you mention it takes a while for the fwd control to engage are you talking about the motion of the throttle/shift handle? The shift should only happen at idle RPM. Is the motor idling normally?
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    How long is the skeg on a mariner 30/40

    Is that a Mercury Mariner or a Yamaha Mariner? I don't think the length of the skeg is critical however.
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    Outboard engine I.D. tag decoded.

    6E0 S 070961Looks to be a 1986 model year motor. Would be similar if not identical to a Yamaha 4SJ model. Yamaha branded parts might be available Mariner branded parts are not.
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    Yamaha 40hp unknown outboard ports

    The mysterious screw is connected to the shift cam assembly. Confirmed by looking at a later service manual.
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    Yamaha 40hp unknown outboard ports

    Interesting. Not shown or mentioned in the service manual.
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    Shift rod position after impeller change

    True but there is the cost to get the motor to the mechanic. Not the mechanics responsibility.
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    Yamaha 40hp unknown outboard ports

    The one labeled wash is to flush the motor using a Yamaha flush hose in lieu of flush muffs. The forward one is a mystery to me. I would remove the plug and see what comes out.
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    Yamaha 40hp unknown outboard ports

    Any idea what model motor? They are not all the same.
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    Resistor wire

    Any idea what brand and model of motor? You can move the coil to see what happens.
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    Shift rod position after impeller change

    I can only address Yamaha branded motors but there are no lower unit defective installations that can be corrected for via cable adjustments. I would suspect the same on Mercury's.
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    Spark plugs

    How long has your life been? It was common practice years ago to use a timing light so as to turn a distributor so that the idle timing was correct. A vacuum source was connected to the distributor so that timing would change as the manifold pressure went up and down as the load and RPM of the...
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    Spark plugs

    Is the model of the motor unknown? Is it known if it is a Suzuki or a Yamaha brand?
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    Spark plugs

    You are a good man. What model motor?
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    Spark plugs

    I suspect he is presently munching on a slice of humble pie.
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    Spark plugs

    Typical Yamaha spark plug gapping information is seen below. Same gap. Different units of measure.
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    Spark plugs

    "Previous owner had plugs gapped at .34 mm and that seems more reasonable but I have no idea." "Lol...I know how to gap plugs." Which is it? Apparently no to the second verbiage.
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    Spark plugs

    What does syncing carburetors have to do with setting the gap of a spark plug?
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    Spark plugs

    Any idea as to the model of the motor or the spark plugs?
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    Strip gears off propshaft

    MMM. Motor Models Matter
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    trim tilt 3 wire?

    Some folks should not be allowed to work on their own motors.
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