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    Yamaha 90 no fire on cylinder 1

    Test equipment and test procedures are needed. Firstly to verify that the number one spark plug is not firing at any time. Presumption being that this has already been done. But then I am not understanding how the motor is running great below WOT RPM if the number one plug is not firing. With...
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    Suzuki DT15C wiring schematic

    The wiring diagrams would be in the applicable service manual.
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    2004 Yam F225 4 Stroke

    The entire assembly can be removed from between the clamp brackets.
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    2004 Yam F225 4 Stroke

    Probably. But why would you want to?
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    2008 Yamaha P90TXR block

    Or is it the block?
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    2008 Yamaha P90TXR block

    Understatement of the year.
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    2008 Yamaha P90TXR block

    What is the compression for each of the cylinders?
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    Yam 50TLRC 2004 I need a tank to motor hose assbly that fits this motor ??

    Not interesting at all. The parts are where they always are. Simply go to the applicable Yamaha parts catalog to see what Yamaha installed during production. www.yamahaoutboards.com
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    Explain how fuel system works OX 66

    When the key is turned on the electric fuel pump runs for a brief period of time. To pressurize the fuel system. It may or may not be heard. Depends upon ones hearing, the noise from the pump, if the cowling is on or not... When the motor is being cranked the fuel pump runs. When the motor is...
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    COIL INFO

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    Finding model # on my Yamaha

    The model identity is on a decal that is attached to the clamp bracket. On that same decal is what Yamaha calls the primary ID. PID. If the decal on the clamp bracket is gone then there is another decal on the block that provides the serial number of the motor. That decal is usually in the...
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    F80 - sometimes won't turn off

    That is one form of preventative maintenance. Disconnecting and reconnecting electrical connectors that is.
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    do Yamaha Outboards have a model year ?

    For instance
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    do Yamaha Outboards have a model year ?

    The production year of your F40LA model can be found in two ways. There is a sticker on the motor that gives the month and year of production. You can go to the Yamaha US website and do a search of the parts catalogs by serial number. It will take you directly to the parts book for your...
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    do Yamaha Outboards have a model year ?

    Yamaha stopped using model year designators in 2005.
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    Mariner 5M no impeller?

    Water flowing over the lower unit is the cooling mechanism.
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    Identifying a 75hp 2stroke (i think) 2005 with missing model number (and it won't start )

    My guess is that MS5C-311-1 is the vendor number for Yamaha part number. Seems someone replaced the OEM part with a non OEM part. free picture upload
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    Mariner HP & Model decode.

    Technically one should be ordering parts for a Mariner model using the applicable parts catalog for that model. Trouble is finding parts under Mariner part numbers for older motors is all but impossible to do.
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    Mariner HP & Model decode.

    My information with respect to the model year is coming from a Yamaha proprietary document. The comment about a Mariner with a 689 prefix is based on my school of hard knocks and observations about the parts that are used on certain Mariner models.
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    Mariner HP & Model decode.

    1988 model year motor. Equivalent to a 1988 Yamaha 30LG model.
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