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    2005 90hp Yam no spark.

    It is difficult to keep up with what is doing what within any given Yam.
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    2005 90hp Yam no spark.

    Only one pulser coil.
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    2005 90hp Yam no spark.

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    High Voltage Yamaha two stroke 75 HP 2015 model

    System double posted for me. I could not make a correction.
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    2005 90hp Yam no spark.

    The specifications and the test procedures are in the applicable Yamaha service manual. LIT-18618-02-66.
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    High Voltage Yamaha two stroke 75 HP 2015 model

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    High Voltage Yamaha two stroke 75 HP 2015 model

    What type of 70 amp battery? Sounds too small. Yamaha specifies a flooded lead acid battery with a minimum of 502 Marine Cranking Amps. I would check the ground circuits from the rectifier/regulator to the engine wire harness. Ground connections of the battery cables at the motors also. But...
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    2005 90hp Yam no spark.

    Yams don't use a trigger. Either a pulser coil or a crank position sensor initiates electrical discharge from the CDI assembly. Sometimes both are used.
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    50TLRB Tilt Relay Mystery

    All Yams use two relays of a fashion. Those that have trim and tilt or power tilt. Some integrated together within one unit. Some use two separate relays. Ala Mercury. Google is not needed. Outboard motor forums not needed.
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    50TLRB Tilt Relay Mystery

    When was that?
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    2005 90hp Yam no spark.

    First thing? Probably the kill switch.
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    50TLRB Tilt Relay Mystery

    With Google, why does anyone come here in the first place?
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    50TLRB Tilt Relay Mystery

    Google can be your friend.
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    50TLRB Tilt Relay Mystery

    How it works. TMI?
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    50TLRB Tilt Relay Mystery

    Xray view of Yamaha relay assembly.
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    50TLRB Tilt Relay Mystery

    The Yamaha relay is an assembly of two relays within one housing. You can't see them individually.
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    50TLRB Tilt Relay Mystery

    best image hosting
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    50TLRB Tilt Relay Mystery

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    50TLRB Tilt Relay Mystery

    Mercury offered a trim and tilt relay modification for those motors that were made for Mercury by Yamaha. Branded as Mercury models. As noted, some changed to the Mercury style of relays in lieu of staying with the Yamaha relay assembly. Seems to be what you have.
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    2001 F115 alternator output

    It relates because Yamaha says that the electrical generation system of the F115 is compatible with an AGM lead acid battery. The age is irrelevant.
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