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    Anyone knows the ring gap size

    I had given the guy a link to where he could buy his manual in an earlier thread. $15 bucks for a pdf viewable copy. In response to a request of his. I can only guess now that he wanted a free manual. Obviously he did not buy the manual and came back here for free information. I don't suffer...
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    Anyone knows the ring gap size

    Better to beg on the internet than to pony up some money for a manual.
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    Anyone knows the ring gap size

    What I do not understand is someone performing a non insignificant repair without having a service manual available.
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    Anyone knows the ring gap size

    Page 5-35 of your service manual. Do you not see it? Looks like this.
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    Yamaha 50hp rebuild ?

    I am not understanding your comment about having to do all three pistons at the same time.
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    2001 Yamaha 8hp 4 stroke

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    Numbers on OX 66 CDI

    You are welcome. I should have noted the dash numbers are not related to the calendar years. All part numbers start out as -00-XX. If and only if they are updated do they change to -01-XX and so on and so forth. The last two characters/digits in the dash number is a color code/finish code, if...
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    Numbers on OX 66 CDI

    The Y in the model identity SX250TXRY indicates it is a 2000 model year motor. The parts catalog shows that the SX250TXRY was delivered with a 65L-85540-01-00 CDI. The -00-00 and the -01-00 CDI's have been superceded by the -02-00 CDI. Either the 00-00, the 01-00 or the -02-00 CDI's will work...
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    2001 Yamaha 8hp 4 stroke

    God forbid anyone read the instructions.
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    2001 Yamaha 8hp 4 stroke

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    2001 Yamaha 8hp 4 stroke

    Yep.
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    2001 Yamaha 8hp 4 stroke

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    time to replace power trim relays on merc 90hp 2001 again?

    Easy enough to trouble shoot the relays. Swap the up and down relays. See if the problem moves from the failed side to the good side and vice versa.
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    time to replace power trim relays on merc 90hp 2001 again?

    See if you can find some solid state relays that have the current carrying capacity of the mechanical relays. Generally they have a much longer service life. I suspect once you see the price of the solid state gizmo it might make sense to carry a spare mechanical relay.
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    time to replace power trim relays on merc 90hp 2001 again?

    What is the serial number of the motor?
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    Your Best Technique for Rope Starting Merc 20hp EFI

    EFI with a choke?
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    F225 Yamaha- Lower unit bolts (from 30 to 25)

    It is all laid out for you in the applicable Yamaha parts catalog. For example
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    Your Best Technique for Rope Starting Merc 20hp EFI

    Interestingly enough, what is called a stator in some Mercury Marine models is now called an alternator by Mercury Marine for the batteryless EFI models. The stator being a part all alternators of course.
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    Decompression valve

    I am now wondering if these batteryless EFI's are inherently harder to pull start than non EFI models. It takes some mechanical energy to create the electrical energy needed to operate the ECU and electric fuel pump.
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    Decompression valve

    This thread talks about using an electric drill motor to crank the motor. https://forums.iboats.com/threads/your-best-technique-for-rope-starting-merc-20hp-efi.780631/
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