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    Converted my 1999 2 stroke 9.9 to a 15hp

    Different part numbers. Different parts. Different valve opening.
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    High Altitude Rejetting

    www.jetsrus.com
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    2005 Yamaha 90 LTR 2 cycle blowing 20 amp motor fuse

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    2005 Yamaha 90 LTR 2 cycle blowing 20 amp motor fuse

    Two bad regulators in a row seems improbable. But if every time the R/R is connected to the red lead the fuse blows, I can't see what else it could be. Have you tried disconnecting the input wires to the regulator? Don't know if a fault in the input wires to the R/R can cause the problem but...
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    2005 Yamaha 90 LTR 2 cycle blowing 20 amp motor fuse

    What do you mean when power is applied? When the battery is connected?
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    2005 Yamaha 90 LTR 2 cycle blowing 20 amp motor fuse

    Try leaving the R/R red output lead connected but disconnect the two green input leads and see what happens.
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    1999 Yamaha 9.9 lighting coil question

    The coil outputs alternating current. A battery requires direct current. You are going to need either a rectifier or a rectifier/regulator.
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    Wiring diagram

    It has. It does. But remember, Yam data is written for a trained Yam mechanic. This error should be obvious to him.
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    Wiring diagram

    Because the Off and the On are in the wrong position. Yamaha data is known to be somewhat screwed up.
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    F115 Yamaha no trim

    If you can't find the relay, follow the wires from the trim and tilt assembly outside of the cowling to the relay within the cowling.
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    Wiring diagram

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    2013 f150 jet tiller says “engine in For R or running” when hooked to yds

    The neutral safety switch is for start in gear protection. It interrupts power to the starter motor relay if the motor is in gear. The neutral position switch tells the ECU if the motor is in neutral or in gear. In a jet drive application it is normally fixed in the "in gear" position.
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    Yamaha 15 hp 2stroke stock propeller size?

    Small Yams do come from the factory with a propeller installed. This is from Yamaha US data for the last year that the 15MSH was offered.
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    Yamaha 150 hp - 4 stroke - 2009

    Instead of a casting flaw I would suspect that it was corrosion that caused the hole. The other block may be along as well, given enough time. Some weld the block with a TIG welder. Some JBWeld or epoxy the hole in the block. Some will tap the hole and insert a plug.
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    1999 yamaha 2 stroke 9.9 to 15hp conversion

    See the data posted above your message. No change in RPM between the two models. 9.9 and the 15. Simply seems to be letting more air through the carburetor. Carburetor adds more fuel of course. More air, more fuel, more power.
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    1999 yamaha 2 stroke 9.9 to 15hp conversion

    I have compared the 9.9 and the 15 parts catalogs. Only difference that I can see in the reed valve assembly. I have compared the 9.9 and the 15 service manual. Only difference that I can see is the reed valve assembly. Would not have believed it had I not seen it.
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    Yamaha F150 Speedo Tube Disconnected?

    I don't think that I can.
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    Yamaha F150 Speedo Tube Disconnected?

    It is no work at all.
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    Yamaha F150 Speedo Tube Disconnected?

    Good grief.
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    Yamaha F150 Speedo Tube Disconnected?

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