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    yamaha f150 running problem

    When the motor starts to bog down mist some gasoline into the air intake. See if it picks and runs better.
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    2005 Yamaha F115 command link/nmea2000 compatibility

    If you find the bright white Command Link connector you might be able to get some Command Link data from the -21 ECU. But it won't have the capability that the -40 ECU offers.
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    2005 Yamaha F115 command link/nmea2000 compatibility

    The -40 ECU is the one with Command Link capability. The ivory connector shown is for connection to conventional Yamaha gauges. The Command Link connector is bright white. Has a cap on it. Four pin connector with but two wires. One blue. One white.
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    Yamaha 130 2 stroke oil injection question

    Not on a Yamaha 130 carburetted two stroke they aren't. You might have been thinking of an OX66 model.
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    Yamaha 130 2 stroke oil injection question

    What fuel?
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    40 hp 2 stroke open/close switch?

    That valve is part of the Yamaha Primestart system. An automatic fuel enrichment and derichment device if you will. The valve is shown in the off position. Should be in the normal (automatic) position.
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    Did the factory connect my fuel system wrong, please help!

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    Did the factory connect my fuel system wrong, please help!

    The damper is just a plug that comes from the factory. To keep dirt and dust out of the fuel line and coupler. The factory or the dealer used worm clamps. The parts book and the service manual show the use of a Yamaha specific band clamp. The factory or the dealer used used an aftermarket hose...
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    Aren't my ignition coils defective?

    host pictures
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    Aren't my ignition coils defective?

    Have the charge coils been tested for proper output to the CDI box? Has the CDI box been tested for proper output to the ignition coils?
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    Aren't my ignition coils defective?

    It does.
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    Aren't my ignition coils defective?

    There are ignition coil output testers. There are procedures for misting gasoline into the intake system to troubleshoot for a fueling related problem. There are those that troubleshoot by replacing suspect parts with new parts, hoping to stumble upon a solution.
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    Help with Engine ID / prop

    Because I spent my time trying to help you by asking you a couple of questions. To which you apparently could not be bothered spending any of your time to answer. Then you jumped 99yam who was also trying to help you. While I like the vast vast majority of people, I don't like your kind.
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    Help with Engine ID / prop

    Too much work. OP wants to be spoon fed information. Probably then biitch about the cost of whatever propeller was recommended.
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    2003 Mercury 90HP 4 Stroke Grounds

    Never heard that term before. Now I am wondering what factory? If someone is asking about a Mercury branded motor made by Yamaha does the "factory" mean the Yamaha factory where it was made (Yamaha Service Manual) or does it mean Mercury who only sold the motor (Mercury Service Manual)?
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    2006 merc 40 4 stroke

    Is the engine serial number not known?
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    2006 merc 40 4 stroke

    What does a voltage regulator have to do with ignition?
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    50hp EFI diaphragm fuel pump pressure

    Where are you seeing a value of 19 psi? In a service manual or from an actual measurement?
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    Help with Engine ID / prop

    The motor did not come from Yamaha with a propeller installed. A boat builder, a Yamaha dealer or a previous owner selected and installed the propeller type (brand/model/diameter/pitch) that they felt was best at the time of installation. Different users want different results from a propeller...
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    1997 C40MLA 2 stroke 4 cylinder primer system?

    Can you provide the engine ID/serial number?
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