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  1. #1

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    Choise of carburettor

    I have several engines to be converted;
    3 Toro 25 double barrel
    1 Toro 25 single barrel
    1 Weedeater 21cc
    1 Stihl 40CC

    I want to replace the carburettors on all engines, i dont want to mess with rebuild kits.
    I want all the 25cc and the 21cc to use the same type of carb.
    I guess the 40cc will need a bigger carb.

    I do not know much of carburettor models and numbers, so i want some input of what carbs i can use.
    It should be a well known type that is easy to set up, and with 2 needles.

    Thanks.

  2. #2

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    RE: Choise of carburettor


    ORIGINAL: jmj

    I have several engines to be converted;
    3 Toro 25 double barrel
    1 Toro 25 single barrel
    1 Weedeater 21cc
    1 Stihl 40CC

    I want to replace the carburettors on all engines, i dont want to mess with rebuild kits.I want all the 25cc and the 21cc to use the same type of carb.
    I guess the 40cc will need a bigger carb.

    I do not know much of carburettor models and numbers, so i want some input of what carbs i can use.
    It should be a well known type that is easy to set up, and with 2 needles.

    Thanks.
    You got money to burn?

    A rebuild kit is about 1/4 the price of a new carb. And it's not rocket science to put the kit in the carb. If I can do it, anybody can do it. Trust me.
    Airplanes have expiration dates. Its just not printed anywhere on them.
    Im not really an airplane pilot; but I did stay at a Holiday Inn Express last night.

  3. #3

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    RE: Choise of carburettor

    No, but the original Toro carbs is no good, so the must be changed.
    The weedeater carb is a 1 needle thing, it works, but i guess i will get more power with a bigger carb.
    The 40cc carb is the oonly one i can use as it is.

    JM

  4. #4

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    RE: Choise of carburettor


    ORIGINAL: jmj

    I have several engines to be converted;
    3 Toro 25 double barrel
    1 Toro 25 single barrel
    1 Weedeater 21cc
    1 Stihl 40CC

    I want to replace the carburettors on all engines, i dont want to mess with rebuild kits.
    I want all the 25cc and the 21cc to use the same type of carb.
    I guess the 40cc will need a bigger carb.

    I do not know much of carburettor models and numbers, so i want some input of what carbs i can use.
    It should be a well known type that is easy to set up, and with 2 needles.

    Thanks.
    Simply buying and replacing carbs will not solve many problems. You will be disappointed. To be successful with conversions it will be necessary to understand at least the fundamentals of how the carb works.

    Bill


  5. #5

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    RE: Choise of carburettor

    And how do you know i dont?.
    If a carburettor is not suitable for using in a converted engine (Toro), it will have to be replaced with another type.
    JM

  6. #6

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    RE: Choise of carburettor

    And how do you know i dont?.
    Never said you didn’t know.

    Bill

  7. #7

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    RE: Choise of carburettor

    Hi JMJ,
    The most common carbs here in the states are Walbros. The 25cc engines run best with 11mm carbs. The smaller engines may like a 8 to 10mm better. The 40cc can use a 11mm, 12.7mm or a 13.49mm. I am goung to try a 12.7 on mine, but I'm sure that it would run just fine with the 11mm or 13.49mm. Just about any two needle Walbro carb of the above sizes will work fine. You should be able to get some good deals on E Bay or RCU classifieds. The venturi size is what you are concerned with. This size is cast into the venturi enterance on Walbro carbs in 64ths. 28/64ths equal 11.1mm. Some models have have builtin choke and others have a builtin promer bulb with an extra fuel connection. I don't have any idea of how much thw taxes would be. I know that you folks pay a lot up there. I like the WT-324 for a 11mm carb because I bought several new on ebay for $30. Good luck.

    Dave
    Every day above ground is a good day.

  8. #8
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    RE: Choise of carburettor

    I have done many Echos and a couple of Toros. The carbs that work best on up to about 25cc is a 9.54mm carb, I have tried bigger but no real difference. 40 to 50cc engines I use a WT-201 and it has a 13.4mm venturi. Look at some of my recent past posts, I have plenty of information on this issue. Good luck.

  9. #9

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    RE: Choise of carburettor

    Thanks for all replies, lots of good info.
    Now, i have to search eBay...

    JM


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