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    01 yamaha 115 2 stroke lost spark cylinder 2 & 4

    DC setting.
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    8HP 1997 2cyl, 2 stroke Yam

    Interesting. I learned something new then. How is the piston installed? From the crank shaft side?
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    8HP 1997 2cyl, 2 stroke Yam

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    8HP 1997 2cyl, 2 stroke Yam

    If the motor runs pretty good on both cylinders why was a drop test performed?
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    8HP 1997 2cyl, 2 stroke Yam

    ???
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    01 yamaha 115 2 stroke lost spark cylinder 2 & 4

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    01 yamaha 115 2 stroke lost spark cylinder 2 & 4

    Two pulser coils firing four cylinders. One two-wire pulser coil fires two separate cylinders at different times in the firing order.
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    01 yamaha 115 2 stroke lost spark cylinder 2 & 4

    I would first check the output voltage from the pulser coils.
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    Yamaha 115hp 2011 4 stroke idle not adjusting properly

    Labor at $100 +/ hr adds up quickly.
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    Thoughts on a 2001 Yamaha 200 HP 2 stroke - GOOD ? BAD ? UGLY ?

    It's the innerweb! Amazing place. Got a problem that a Yamaha Master Mechanic cannot solve? Someone on the innerweb knows exactly what part number needs to be replaced. Hell, folks got solutions even when there are no problems.
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    2001 Yamaha 70TLRA no spark

    First sentence says "I have no spark". Second sentence says "Ran motor for 15-20 minutes...". I am confused. How was the motor able to run for any time at all without spark?
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    1990 Yamaha Pro 50 2-Stroke - trouble starting, now it won't start

    Looks like LIT-18616-00-35 is the one that would work.
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    1990 Yamaha Pro 50 2-Stroke - trouble starting, now it won't start

    Since the fuel enrichment device on the OP's model is not automatic, I withdraw my incorrect comment about it being a Primestart device. Too many differences with Yams to try and keep tabs on them all.
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    Reattaching an oil pump (and reservoir) too a 2004 Yamaha 50hp 3cyl 2 stroke?

    What is meant by this statement?
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    Reattaching an oil pump (and reservoir) too a 2004 Yamaha 50hp 3cyl 2 stroke?

    Do you not have the applicable Yamaha service manual? It would be worth its weight in gold.
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    1990 Yamaha Pro 50 2-Stroke - trouble starting, now it won't start

    1990 model year motor alright. I am not seeing any choke plates. I think that I am seeing the PrimeStart device.
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    1990 Yamaha Pro 50 2-Stroke - trouble starting, now it won't start

    What is the complete engine ID? 6H5 L and then some numbers. What country are you in?
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    1990 Yamaha Pro 50 2-Stroke - trouble starting, now it won't start

    A 1990 Pro50LD does not have use choke plates. It is a prime start model. Automatic fuel enrichment. Nothing need be done by the operator. The toggle choke switch is on the 703 control box for those models that have carburetors with chokes. The toggle switch does nothing. Despite many saying...
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    2000 Yamaha 50HP bad center cylinder

    Not a dream. A nightmare.
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    2000 Yamaha 50HP bad center cylinder

    I am still going with detonation damage or pre-ignition damage. One can lead to the other. The ugly red headed step sisters of catastrophic engine damage.
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