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  1. #526

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    RE: SMALL DISPLACEMENT FOUR STROKE GLOW TO GAS CONVERSION

    Have not a clue.... Only that in a RCuniverse walbro to Zema conversion they were equal....
    so I ASSuME they are the same...

    I saw the M&M site but wasn't sure what the walbro "part" meant....(a actual carb, or carb kit parts ect)

    Here is one place that gives cross reference: http://www.manddsmallengine.com/carburetors/zama.html

    I know ther is also a very good one on RCuni... can't find it right now though.

    CARBURETOR Cross Reference WALBRO to ZAMA

    RYOBI/MTD
    MODEL WALBRO ZAMA
    STRING TRIMMER WT-456 > C1Q-P8
    STRING TRIMMER WT-827 > C1U-P10A
    STRING TRIMMER W/ GOV. WT-455 > C1U-P11B
    STRING TRIMMER WT-827 > C1U-P14A


    C1Q Butterfly
    Diaphragm Carburetor


    Carburetor Type Engine Size Throttle Bore Diameter Venturi Diameter Mm
    C1Q 14-50CC 11MM 6.5
    C1Q 14-50CC 12.7MM 8.0, 9.5
    C1Q 14-50CC 14MM 8.0, 9.0, 9.5, 10.0, 11.0
    C1Q 14-50CC 16MM 9.5, 10.0, 11.0, 12.5, 13.5, 14.0

    Applications: String Trimmers, Chain Saws, Blowers , Hedgetrimmers & Edgers
    Carburetor Type Engine Size Throttle Bore Diameter Venturi Diameter Mm
    C1M 14-50CC 14MM 8.0, 10.0
    C1M 14-50CC 16MM 9.5, 11.0, 12.5, 13.5


    Available Features:
    Choke
    Accelerator
    Remote Primer
    Pump-Side Primer
    Metering-Side Primer
    Tamper Resistant Limiter Caps
    Twist Start ®
    Simple Start ®
    Multi-Position Throttle Control

    Standard Features:
    Zama Patented Friction Bar & Ring
    Zama Metering Diaphragm Manufactured “ONE AT A TIME”
    Zama Manufactured Mixture Needles, Shafts and Nozzles.



    not sure how the Available features become on the carb though....


    If you can\'\'\'\'t dazzle em with brilliance,baffle em with BS

  2. #527
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    RE: SMALL DISPLACEMENT FOUR STROKE GLOW TO GAS CONVERSION

    Here's the only parts diagram I could find for Zama. It was from some 3rd party site. There doesn't seem to be an organized site with all the different carb's diagrams (for Zama). And looking at these detailed diagrams are the only way to answer questions such as the presense of an intake-only spring, or an accelerator pump. Anyway, here's the diagram.
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  3. #528

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    RE: SMALL DISPLACEMENT FOUR STROKE GLOW TO GAS CONVERSION

    I honestly do not know what I am looking at...or for...
    could you tell me what you see???

    THanks..
    If you can\'\'\'\'t dazzle em with brilliance,baffle em with BS

  4. #529

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    RE: SMALL DISPLACEMENT FOUR STROKE GLOW TO GAS CONVERSION

    There was a guy earlier in this thread that posted a response from Zama saying that the diaphragm return spring is available if desired but that the diaphragm material was designed to be resilient enough to spring back on its own.

    If you search back I think there was even a part number stated in the response.

    Mike

  5. #530
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    RE: SMALL DISPLACEMENT FOUR STROKE GLOW TO GAS CONVERSION


    ORIGINAL: kochj

    I honestly do not know what I am looking at...or for...
    could you tell me what you see???

    THanks..
    that's why I was wondering if there is an organized Zama parts site that has diagrams (exploded views) of their various carbs. Because the picture I DID find was useless....too fuzzy to read anything on there.

    Optech: Wouldn't it be nice if one could search WITHIN a thread for something? Or, can it be done easily? Maybe so, and I'm just not aware. Thanks!

  6. #531

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    RE: SMALL DISPLACEMENT FOUR STROKE GLOW TO GAS CONVERSION

    The internals.....
    Got 2-of them... @15$ per carb, it was worth a try...
    The diaphram is 2-or more clear stiff plastic...
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    If you can\'\'\'\'t dazzle em with brilliance,baffle em with BS

  7. #532

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    RE: SMALL DISPLACEMENT FOUR STROKE GLOW TO GAS CONVERSION

    Do you guys know if the 2nd small brass outlet/inlet is if you wanted to install a primer pump ?? (In the 2nd picture right next to the low needle)
    And I will have to crimp this off?
    I don't think it is for intake tube to connect to?

    I would think the carb would be like the Walbro and you have to have the tube line up on the base of the carb where there is a little hole, for intake pressure tube..

    Anyone care to jump in on this one?
    If you can\'\'\'\'t dazzle em with brilliance,baffle em with BS

  8. #533
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    RE: SMALL DISPLACEMENT FOUR STROKE GLOW TO GAS CONVERSION

    It's a little hard to follow your questions because when you ask about a little hole, you called it a tube. But when REALLY referring to a tube, you called it an inlet. But I probably suffer from a little Aspergers, so it's my problem, not yours.

    Anyway, I think you're correct. Just crimp & solder the straight tube. Or cap it off with one of those little caps. This means to start the engine you'll need to be able to cover the venturi with your finger. Turn off the ignition, go to WOT, and flip the prop until your finger is wet. Then it should start. If you actually use the primer as intended, this procedure MAY not be necessary.

    Yes, the little hole in the base is the impulse input. It usually just routes to the crankcase. In 4 stroke applications, it goes to the intake stack.

    In picture #2, there is a little hole in the face of the base. This hole lines up with the cross shaft of the throttle plate. Look in this hole as you move the throttle to see if there is a little brass plug moving up and down. If it's there, it means you have an accelerator pump.

  9. #534

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    RE: SMALL DISPLACEMENT FOUR STROKE GLOW TO GAS CONVERSION

    In this picture, I have at the tip of this screw driver? what? = A primer tube that I should crimp off? Correct?
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    If you can\'\'\'\'t dazzle em with brilliance,baffle em with BS

  10. #535

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    RE: SMALL DISPLACEMENT FOUR STROKE GLOW TO GAS CONVERSION

    In this picture; I have at the tip of my screw driver....??
    The hole that lines up with the intake manifold??
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    If you can\'\'\'\'t dazzle em with brilliance,baffle em with BS

  11. #536

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    RE: SMALL DISPLACEMENT FOUR STROKE GLOW TO GAS CONVERSION

    The tip of the driver must be where a hole would be drilled and the accelerator pump would be, correct?

    So if mine doens't have one, is there a issue with that??
    Will there be a issue with tank placement??

    What purpose of a accelerator pump?
    Fuel delivery? Attomization?

    Thanks..
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    If you can\'\'\'\'t dazzle em with brilliance,baffle em with BS

  12. #537

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    RE: SMALL DISPLACEMENT FOUR STROKE GLOW TO GAS CONVERSION

    I just ordered up 2-WT 456's .....from the the Isanti MN store....
    I will try the Zama carbs either way....

    If you can\'\'\'\'t dazzle em with brilliance,baffle em with BS

  13. #538
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    RE: SMALL DISPLACEMENT FOUR STROKE GLOW TO GAS CONVERSION

    The accelerator pump squirts a little extra fuel into the carb throat when you advance the throttle.
    Attended the CutFinger Institute of DirtNap University for years but never did graduate....
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  14. #539

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    RE: SMALL DISPLACEMENT FOUR STROKE GLOW TO GAS CONVERSION

    On a Walbro, if there is a hole that exposes the butterfly shaft on the gasket face of the carb, it is has a accellerator pump. The pump is a spring loaded piston that moves on a flat spot on the shaft. It looks like the Zama might be the same from your picture.

  15. #540
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    RE: SMALL DISPLACEMENT FOUR STROKE GLOW TO GAS CONVERSION


    ORIGINAL: kochj

    The tip of the driver must be where a hole would be drilled and the accelerator pump would be, correct?

    So if mine doens't have one, is there a issue with that??
    Will there be a issue with tank placement??

    What purpose of a accelerator pump?
    Fuel delivery? Attomization?

    Thanks..
    No, that is not correct. As I said earlier, look for a hole on the mounting face of the carb, that lines up with the throttle plate's cross shaft. When I say "lines up", I mean the two holes cross each other. In your picture, I'm pretty sure I see just such a hole. Look for a little brass piston moving up & down when you rotate the throttle lever. Also, usually, you'll feel some spring tension as you rotate the shaft. Most people assume that is the external return torsion spring they're feeling. But if you remove (or unhook) the external throttle return spring, you'll still feel spring tension on the throttle. That is the accelerator pump. There's a compression spring under the little piston that keeps the plug pushing up against the throttle plate shaft.

  16. #541
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    RE: SMALL DISPLACEMENT FOUR STROKE GLOW TO GAS CONVERSION


    ORIGINAL: kochj

    In this picture; I have at the tip of my screw driver....??
    The hole that lines up with the intake manifold??
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  17. #542

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    RE: SMALL DISPLACEMENT FOUR STROKE GLOW TO GAS CONVERSION

    Okay....It does have a pump.......

    I cancelled my order from pats small engine shop in Issanti MN....
    The reason... I was told it was on back order for 2-4 weeks...
    What they didn't know, is that the carb. is discontinued, and they may never recieve the delivery of that
    particular walbro carb.......
    The woman I spoke with was very nice, and if I still want to get that walbro carb, I will call them up again...

    I do believe the zama will work just as good as the walbro....I just have to test it out...

    I have a OS 1.60 gemini twin, that already has a C&H ignition, and I have to come up with a way to mount both carbs on it...
    If I could have someone machine up a mount for a single carb attachment, it would be quite easy (hint hint)

    I have always found one cyl in this engine to be diff than the other....Being I will have gasoline in it, I don't want to
    take the chance of a leaned out run or cyl...

    1-carb per cyl is the way to go IMHO.... Even though the new saito gas twin, has only 1-carb shared between the two cyl's...
    If you can\'\'\'\'t dazzle em with brilliance,baffle em with BS

  18. #543

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    RE: SMALL DISPLACEMENT FOUR STROKE GLOW TO GAS CONVERSION

    If I go the twin carb route, I will have to come up with a altered intake pipe...
    Has anyone, or does anyone know if SS tubing can be used in a copper pipe flange maker?
    Or is there a need for a specialized one??

    Or perhaps I could use copper tubbing?
    If you can\'\'\'\'t dazzle em with brilliance,baffle em with BS

  19. #544

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    RE: SMALL DISPLACEMENT FOUR STROKE GLOW TO GAS CONVERSION

    Way back on page 11 is where Evert1969 talks about the message he got from Zama about the spring.

    Mike

  20. #545

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    RE: SMALL DISPLACEMENT FOUR STROKE GLOW TO GAS CONVERSION


    ORIGINAL: Evert1969

    I've read the posts in this forum and results are in this movie: http://www.youtube.com/watch?v=aXXA8ZrBD4Y

    Thanks for all the advises.
    Here's where he posted a video of his little Saito 80 running with Zama carb.

    Mike

  21. #546

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    RE: SMALL DISPLACEMENT FOUR STROKE GLOW TO GAS CONVERSION

    The needles didn't seem to be right yet.... (in the video)
    ...... Thank you for posting the link!...

    Does anyone know where the best place to get the Rxcell ignitions with the 1/32 boot (or is it 1/4)
    If you can\'\'\'\'t dazzle em with brilliance,baffle em with BS

  22. #547
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    RE: SMALL DISPLACEMENT FOUR STROKE GLOW TO GAS CONVERSION

    These people have a good track record and excellent service

    http://www.valleyviewrc.com/RCEXL%20Ignitions.htm
    Attended the CutFinger Institute of DirtNap University for years but never did graduate....
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  23. #548

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    RE: SMALL DISPLACEMENT FOUR STROKE GLOW TO GAS CONVERSION

    Thanks wayne..
    Looks like they supply the regular sizes....

    I am looking for the 1/4-32 size set to go...
    I found this site....
    Agape Racing and Hobby has one already to go....
    No need to buy additional parts and hastle...
    1/4-32 90 Deg RCEXL Ignition System-Single Cyl.
    1/4-32 Mini Spark Plug-Single Cylinder-90 Degree
    55$ + shipping...
    If you can\'\'\'\'t dazzle em with brilliance,baffle em with BS

  24. #549
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    RE: SMALL DISPLACEMENT FOUR STROKE GLOW TO GAS CONVERSION

    Jim Willis at Agape has been a good source for parts
    Attended the CutFinger Institute of DirtNap University for years but never did graduate....
    Recipient, Mangledhand award August 2008
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  25. #550
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    RE: SMALL DISPLACEMENT FOUR STROKE GLOW TO GAS CONVERSION


    ORIGINAL: kochj

    Thanks wayne..
    Looks like they supply the regular sizes....

    I am looking for the 1/4-32 size set to go...
    I found this site....
    Agape Racing and Hobby has one already to go....
    No need to buy additional parts and hastle...
    1/4-32 90 Deg RCEXL Ignition System-Single Cyl.
    1/4-32 Mini Spark Plug-Single Cylinder-90 Degree
    55$ + shipping...
    You must have called them? All I saw on their site was a bunch of cute dogs and some RC engines.

    CAll them back and ask them if they do the soldering of the stainless steel 1/4-32 metal shroud themselves. And if it's the RCEXL kit. And most importantly, ask them if they're willing to put reinforcement strips soldered onto the 45% angles on the metal shrouds (2x 45 =90 degrees overall). If not, there's a danger of the solder joint breaking during flight. That has happened to me twice. When CH Ignition was in business, they used to reinforce mine for a nominal fee, by soldering a double across the solder joint. And that turned out to be worth a fortune in reliability.

    If you're not sure what I'm talking about, I can supply a photo, or a drawing.


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