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Type: Posts; User: James ion Canada

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  1. Re: 1975 Evinrude 6hp 6504R, Throttle Automatically Decreases if Not Held in Place

    I have a couple of pretty similar engines so I will try and answer your question.

    I don't think it is possible for the flywheel to rub on the ignition coil mounting posts unless
    the flywheel is...
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    Re: Trim / tilt sending unit

    I believe the part number is 0582153
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    Re: Johnson 4 HP 4W75A

    Great site. Thank you too!
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    Re: Johnson 4 HP 4W75A

    Perfect. Thank you!
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    Johnson 4 HP 4W75A

    This is not really a problem with the engine per say...

    I recently purchased this engine not running and now have it running
    pretty good. While reading the service manual I noticed that in order...
  6. Re: 1981 Evinrude 115 rough at low speed

    So I did do a couple of tests using the oscilloscope.
    Other than confirming my Tach is not to far of, I didn't learn
    anything useful (yet).
    I do have one observation I like to get your opinions...
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    Re: carb rebuild kits

    Exactly. I bought one to redo my 4W75A and the valve seat was the wrong thread.
    Everything else seemed OK except the plastic washer that goes under the gland nuts
    was also a bit big, though usable....
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    User Name

    It there a way to change my log in name?
    I made a spelling mistake i didn't notice until after I registered.

    Thanks
  9. Re: 1981 Evinrude 115 rough at low speed

    No further suggestions?

    My next step it to check the wave-forms with my oscilloscope
    to see if I can find where it all goes wrong.
  10. Re: 1981 Evinrude 115 rough at low speed

    Oh, I almost forgot...

    Once warmed up, the cylinder temps seem to top out
    around 120 Degrees Fahrenheit as measured about one
    inch left of the spark plugs. The #2 cylinder was about
    3 degrees...
  11. Re: 1981 Evinrude 115 rough at low speed

    Ok, so I got a new CDI stator and put it in today.
    I took the opportunity to do a little before and after testing.
    These are all voltages taken with a DVA and Digital Meter with
    the engine running...
  12. Re: 1981 Evinrude 115 rough at low speed

    See my explanation for this in post #16.
    That's probably it for this engine for this season.
    Other places for the time and money to go.

    Ill check back in when I get a replacement stator.
    ...
  13. Re: 1979 Evinrude 4hp not getting fuel

    Have you checked the fuel pump?

    If you disconnect the fuel line from the carb, does
    fuel come out wen you squeeze the priming bulb?
  14. Re: 1981 Evinrude 115 rough at low speed

    As promised, stator pictures
    Looks pretty toasted.

    21677

    21678

    21679
  15. Re: 1981 Evinrude 115 rough at low speed

    Does anyone know off hand the size of the flywheel nut?
    Looks like 1"5/16 or 34mm to me. Currently my biggest
    socket is 32mm...
  16. Re: 1981 Evinrude 115 rough at low speed

    Thank you everyone for your help so far.
  17. Re: 1981 Evinrude 115 rough at low speed

    I have a puller on order. Will post details about the stator probably next week.
  18. Re: 1981 Evinrude 115 rough at low speed

    Was the spark what you would have expected?
  19. Re: 1981 Evinrude 115 rough at low speed

    Video
    Gap set to 7/16

    Top two cylinders: https://youtu.be/AUqhvxMcUtc
    Bottom two cylinders: https://youtu.be/stC_rRga2I4
  20. Re: 1981 Evinrude 115 rough at low speed

    I did the spark test and got a strong, blue spark on all cylinders.
    Video to follow.

    When I first got the boat, I was checking over the motor and I noticed that I heard an electrical
    arcing...
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