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  1. #41
    Tool Bag water worx's Avatar
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    Quote Originally Posted by RG5384 View Post
    Got it all back together again. Power valves moving smooth and the servo is cycling them on shutdown. Headed to the river to check it out, but on the trailer I still have no movement when it hits 5k rpm. I donít know if there needs to be a load on it or not, but Iím not feeling optimistic. Iíll report back what I find.

    Thanks for for all the help so far!
    Just cus they cycle at shut down doesnt mean they are working....rev the shit out of it on the trailer & if the "reel" does not move you need a PV servo. And you need to check & see if the PV's are still there....

  2. #42
    Quote Originally Posted by water worx View Post
    Just cus they cycle at shut down doesnt mean they are working....rev the shit out of it on the trailer & if the "reel" does not move you need a PV servo. And you need to check & see if the PV's are still there....
    they are there. Is there any other way to check the servo? I’ve done the gray to black wire jumper test and it passes that.

  3. #43
    Myself's Avatar
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    Once in a while I get a machine here at my shop that won't make full revs and everything checks fine. Stator can ohm out perfectly fine but still be bad. The definitive test for the stator is AC voltage output of the various coils. Usually when this happens I find the excitor coil voltage a bit low and while trying to rev it up the ac voltage actually starts dropping instead of raising. I believe Yamaha calls this the "charge" coil.

  4. #44
    Quote Originally Posted by Myself View Post
    Once in a while I get a machine here at my shop that won't make full revs and everything checks fine. Stator can ohm out perfectly fine but still be bad. The definitive test for the stator is AC voltage output of the various coils. Usually when this happens I find the excitor coil voltage a bit low and while trying to rev it up the ac voltage actually starts dropping instead of raising. I believe Yamaha calls this the "charge" coil.
    What should the stator ohm out at on these? Might as well start to check stuff like that while I wait for the new/used Ebox to arrive. The ebox that I purchased is complete with the harness, so I'm most likely going to totally swap it out including the applicable harnesses. I could enter in more issues, but I could also alleviate something off the wall that otherwise I'd never find..

  5. #45
    Tool Bag water worx's Avatar
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    Quote Originally Posted by RG5384 View Post
    they are there. Is there any other way to check the servo? I’ve done the gray to black wire jumper test and it passes that.
    How do you know they are there ?? You stated that you didnt pull them out....

  6. #46
    Myself's Avatar
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    Some stator ohm numbers here...http://greenhulk.net/forums/showthread.php?t=178663
    Good troubleshooting guide for other Yamaha twins...http://www.pwctoday.com/showthread.php?t=40840
    Voltage output of 800 stator post #8...http://www.pwctoday.com/showthread.php?t=96894

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  8. #47
    Quote Originally Posted by water worx View Post
    How do you know they are there ?? You stated that you didnt pull them out....
    they were removed and cleaned per Jeff’s suggestion. Somewhere on page 4 of this post lol.

  9. #48
    Quote Originally Posted by Myself View Post
    Some stator ohm numbers here...http://greenhulk.net/forums/showthread.php?t=178663
    Good troubleshooting guide for other Yamaha twins...http://www.pwctoday.com/showthread.php?t=40840
    Voltage output of 800 stator post #8...http://www.pwctoday.com/showthread.php?t=96894
    thanks!

  10. #49
    Everything is ohming out correct. Well, mostly. The secondary coil I’m only able to get a very intermittent read on, not sure if it’s just an issue of connectivity inside the boots or a larger problem. Regardless the used ebox will come with a different one, so I will check that one at that time as well.

  11. #50
    Brief update: Got the new cdi installed tonight, also used the replacement coil and wires. Total replacement wasn’t possible due to a cut wiring harness and I didn’t feel like soldering that many wires. Engine fired right up, and power valve is cycling. Of course this is no different than how it acted before, so the real test will be on the water. I’m not optimistic, but who know maybe I’ll be pleasantly surprised.


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