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Thread: Zama C2S carb question

  1. 06-29-2012, 07:02 AM #1
    Arrowhead
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    Zama C2S carb question

    I'm rebuilding a Zama C2S carb. I pulled the bottom metering plate off and the diaphragm and plastic piece just fell out. The metering diaphragm does not have the circular metal piece like most. This one uses a plastic piece (#15) that just sits on it...(I think).
    My question is... does #15 just sit on the lever (#1)? It seems it would float around and come off the lever. I wish they woulda use a normal metering diaphragm.... I hate Zamas.

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    - ED -

    Always looking for P50 and larger Pioneers and Poulan 655's... cash or trades.
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  2. 06-29-2012, 07:44 AM #2
    Chris-PA
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    I suppose there may be an advantage in that the diaphragm does not have to have a hole in it where the metal plate is attached, eliminating a possible stress/failure point. But probably it's just cheaper.
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  3. 06-29-2012, 07:56 AM #3
    redoakneck
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    I have a Homelite mini xl that takes that carb, but mine has a tilly HK 2b8 that apparently does not exist in the tilly parts world. Also a walbro hdc-65 also will fit on this saw.

    I am trying to find a re-build kit for the tilly, or a replacement carb. any help???

    what saw does that carb go to???
    A strong back and a weak mind have left me with the " if yer gonna be stupid, you better be tough" mentality
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  4. 06-29-2012, 08:34 AM #4
    Ifishsum
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    I just rebuilt a Zama C1S - The plastic disc should have a short post on one side that mates into a hole in the metering lever - Once the diaphragm is in place it should stay in position but if you're missing the post then it may not.
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  5. 06-29-2012, 08:56 AM #5
    Arrowhead
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    Quote Originally Posted by Ifishsum View Post
    I just rebuilt a Zama C1S - The plastic disc should have a short post on one side that mates into a hole in the metering lever - Once the diaphragm is in place it should stay in position but if you're missing the post then it may not.
    Is the post metal? The plastic disc has a small nipple on one side. If I remember correctly, it had a hole in it. Is that where the post goes? In the hole?
    - ED -

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  6. 06-29-2012, 09:33 AM #6
    Ifishsum
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    That nipple is what fits into the hole in the metering lever.
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  7. 06-29-2012, 11:25 AM #7
    Arrowhead
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    OK, I figured out what happened. The little stud that is on top of the nipple is broke off. It must have broke when I took it apart and I never noticed it.
    Now to try and figure out what I could use to make a new stud.



    - ED -

    Always looking for P50 and larger Pioneers and Poulan 655's... cash or trades.
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  8. 06-29-2012, 11:32 AM #8
    heimannm
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    Just drill it out and press in a short bit of rod, or wire that will fit the hole in the metering lever. If you could make a small counterbore in the bottom side you could probable even thread in a small screw.

    For that matter, you could probably that the metal plate from a more conventional diaphragm and glue it to the plastic after you cut the boss off.

    No charge for the advice either...

    Mark
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  9. 06-29-2012, 11:53 AM #9
    Arrowhead
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    Fixed it. I used a 1/16" drill and went through the disc. I used a piece of zip-tie to make the stud. It fit tight, but I still glued it in. Yes.... it's all fuel proof.
    Thanks for the help guys.

    - ED -

    Always looking for P50 and larger Pioneers and Poulan 655's... cash or trades.
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  10. 06-29-2012, 11:55 AM #10
    redoakneck
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    Yup, looks broke. can u get just a replacement plastic part???

    I would try some Q-bond and make a new stud, or jb weld. Q-bond dries in minutes and can be sanded to yer proper size.
    A strong back and a weak mind have left me with the " if yer gonna be stupid, you better be tough" mentality
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  11. 06-29-2012, 11:55 AM #11
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    Quote Originally Posted by heimannm View Post
    Just drill it out and press in a short bit of rod, or wire that will fit the hole in the metering lever. If you could make a small counterbore in the bottom side you could probable even thread in a small screw.

    For that matter, you could probably that the metal plate from a more conventional diaphragm and glue it to the plastic after you cut the boss off.

    No charge for the advice either...

    Mark
    LOL... I was doing basically what you said while you were typing.
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  12. 06-29-2012, 11:57 AM #12
    redoakneck
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    Looks good. yall too fast for me. What saw does that go to???
    A strong back and a weak mind have left me with the " if yer gonna be stupid, you better be tough" mentality
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  13. 06-29-2012, 12:48 PM #13
    Ifishsum
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    Nice save!
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  14. 06-29-2012, 04:41 PM #14
    Arrowhead
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    Quote Originally Posted by redoakneck View Post
    Looks good. yall too fast for me. What saw does that go to???
    It's on a Mac Eager Beaver 3.7
    - ED -

    Always looking for P50 and larger Pioneers and Poulan 655's... cash or trades.
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