Champion 16 low amps
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  1. #1
    Join Date
    Mar 2017
    Posts
    10

    Champion 16 low amps

    I have a 1998 champion 16 generator welder. It runs and welds great but what concerns me is that the amperage always seems like it has to be very high. For example, a 7018 3/32 should only need like 90 amps but i need to set the machine to about 140 to get a decent weld. Its also very hard to strike an arc with this machine. The stick constantly gets stuck and im not THAT much of a beginner welder. Its super frustrating. My leads are 100 ft but 0/1 wire so i dont think its a lead issue.

  2. #2
    Join Date
    May 2007
    Posts
    1,894

    Re: Champion 16 low amps

    not familiar w/ that machine, but if the rpms are too low while welding, it could cause what ur describing

  3. #3
    Join Date
    Mar 2017
    Posts
    10

    Re: Champion 16 low amps

    It sounds like its revving up to the right rpm. It sure is loud. I guess i would need to find out the correct rpm and then somehow measure the rpm while its running?

  4. #4
    Join Date
    Apr 2006
    Location
    Soda springs,Id
    Posts
    4,299

    Re: Champion 16 low amps

    Harbor freight sells a phototach that I can testify is very accurate because when I bought it I checked it against a 1750RPM elec motor.
    Mike
    Ol' Stonebreaker
    "Experience is the name everyone gives to their mistakes"

    Miller 175 mig
    Miller thunderbolt ac/dc stick
    Victor O/A setup
    Makita chop saw

  5. #5
    Join Date
    Mar 2017
    Posts
    10

    Re: Champion 16 low amps

    But on a gas motor where would i point a phototach?

  6. #6
    Join Date
    Mar 2017
    Posts
    10

    Re: Champion 16 low amps

    Okay did some more digging. I ordered one of those tachs that wraps a wire around the sparkplug wire. And maybe il grab a phototach too.

  7. #7
    Join Date
    Jun 2013
    Location
    BC Canada
    Posts
    96

    Re: Champion 16 low amps

    i got one of those laser tachs off fleabay for about $15. works great
    piece of soapstone
    tape measure
    chipping hammer (wire handle type)

  8. #8
    Join Date
    Apr 2006
    Location
    Soda springs,Id
    Posts
    4,299

    Re: Champion 16 low amps

    Quote Originally Posted by Octaneforce View Post
    But on a gas motor where would i point a phototach?
    You put a small piece of reflective tape on any part attached directly to the crankshaft.
    Mike
    Ol' Stonebreaker
    "Experience is the name everyone gives to their mistakes"

    Miller 175 mig
    Miller thunderbolt ac/dc stick
    Victor O/A setup
    Makita chop saw

  9. #9
    Join Date
    Mar 2017
    Posts
    10

    Re: Champion 16 low amps

    Motor is reading 3400rpm and then bumps down to 2400 during auto idle. With a load you can hear the motor work a little harder but rpms dont seem to drop. Maybe 3350 if i hold a stick against the metal and let it cook. From what ive read this motor peaks around 3600rpm so it seems to be spinning up fast enough. Its an onan performer 16 2 cylinder.

  10. #10
    Join Date
    Mar 2017
    Posts
    10

    Re: Champion 16 low amps

    Also just checked the voltage at the plugs. With the auto idle off, at 3400 rpm im making correct voltage. Single pole is 120v and double pole is at 240v

  11. #11
    Join Date
    Apr 2017
    Posts
    321

    Re: Champion 16 low amps

    You should see 3600 no load RPM at weld speed, and around 72 open circuit volts at the output lugs.
    Be sure there is almost the same no load OCV at the electrode holder and ground clamp as there is at the power source output.
    Then check for excessive voltage drop during arc load through your welding cables from output lugs on out to the electrode holder and ground clamp.
    You can use a short wire clamped along with your electrode and feed back along the electrode body then attach volt meter test lead to that wire and the other end to your ground clamp.
    This prevents damage to test lead/meter from arc/heat etc.
    Have a helper read arc/load voltage when welding. It would be helpful to know what your voltage is when burning 7018 and does the voltage spike when it sticks.
    Low current/voltage could be a number of things check your OCV at weld speed first then arc voltage.

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