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    Mariner 40E 6E9 S 103761 Can't find a definitive year or manual

    Interesting. Yamaha data says it is a 1985 model year.
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    Yamaha T9.9 no power to starter

    What is the complete model identity. All T9.9s are not the same. Start button or key switch?
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    remote motor control on-off-start

    https://www.ebay.com/itm/147304927029?_trkparms=itmf%3D1%26aid%3D1110006%26rkt%3D12%26asc%3D341166%26pid%3D101875%26mech%3D1%26algv%3DSimplAMLv11WebTrimmedV3MskuWithLambda85KnnRecallV1V2V4ItemNrtInQueryAndCassiniVisualRankerAndBertRecallWithVMEV3CPCAutoWithCassiniEmbRecall%26pmt%3D1%26amclksrc%3D...
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    remote motor control on-off-start

    What Yamaha calls a boat in a box. Box being used to segregate the motor from the boat when trouble shooting.
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    remote motor control on-off-start

    Wiring diagram is in the back of the applicable service manual. No tool available. You will have to devise a means on your own. Most practical and cost effective way would be to disconnect the ten pin connector at the front of the motor. On the motor side connector jumper the red wire terminal...
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    Water pump rebuild after 11 years and 600 hours

    Even a blind hog finds an acorn now and again. Hopefully some aviation mechanic is not following your method of madness.
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    What is this cable? Should it be attached?

    Technically it is a bonding cable. A corrosion prevention device. Tries to keep components from having a difference of voltage. It should be connected. In the photo the bonding wire appears to be missing the end terminal fitting.
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    Vacuum line for Suzuki 2.5HP 4 stroke outboard

    Do you have a link to the part number for the combination hose and orifice?
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    Vacuum line for Suzuki 2.5HP 4 stroke outboard

    Does not even have to be USCG approved. Not understanding how Suzuki is making it harder than it needs to be. Replacement hose is available from Suzuki. The orifice/jet is not available but should not be needed anyway. The Suzuki service manual may have additional details available that...
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    Vacuum line for Suzuki 2.5HP 4 stroke outboard

    From what I am seeing the hose is still available. The jet from Suzuki, apparently not. But if really needed I suspect www.jetsrus.com could come up with one if needed.
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    Vacuum line for Suzuki 2.5HP 4 stroke outboard

    All vacuum lines do not have such a device. Appears to be a restrictor of sorts to help dampen the pressure changes within the hose. What year 2.5 motor? Do you not see the part in the applicable parts catalog?
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    Aluminum vs stainless props

    Any type of propeller can be too much, or too little, for any size or type of motor. That is why there are so many models of both materials in any number of diameters, pitch, number of blades and shapes of blades. One size or type does not fit all. Different folks want different things. As...
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    Aluminum vs stainless props

    Shape and size of the blades also comes into play.
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    90etlf oil pump

    It is a cryin shame that someone with no idea what they were doing removed the oiling system. Very very reliable. Less mess. Less chance for an oil related failure. Given the age of the motor, the availability of the needed parts, and the cost thereof if you can find them, I would leave the...
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    How to contact a mod

    A no should be taken as a no. Your intentions are well meaning but no is no. Try another forum.
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    Are Fuel Injectors and/or HPFP Compatible Between F115 and F250?

    Different part numbers, different fuel pump and injectors. PSI output from the pump depends upon the pressure regulator, not the pump.
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    Just cant figure this out...

    No choke in a 2003 Yamaha F50.
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    Ohm specs

    What is the motor doing or not doing?
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    Ohm specs

    All of the Yamaha specifications can be found in the applicable service manual. https://www.yamahapubs.com/home/search?category_id=4&year=2003&family_name=F50TLRB
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    Very weird Yamaha issue

    Posted below is what Yamaha has to say. That is all I have ever heard from them about this problem. Again, they offer no theory of operation as to what should be happening and when, and what happens if and when things don't go according to Hoyle. Millions of things in life that I have to accept...
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