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  1. #1

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    Walbro or Tillotson Carb

    I recently bought 2 used ZDZ80 Supers. One has a Tillotson carb and the other has a Walbro WJ-71. I want the best combination in the plane I am putting one of the engines in. Which carb should I use? I have a couple older ZDZ 80's with the Walbro WJ-71's and they run pretty good. Has anyone found the Tillotson to be an amazingly good carb? Is it far better than the Walbro?

  2. #2

    RE: Walbro or Tillotson Carb



    Tillotson carbs have been around and used since before 1960 good carbs

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  3. #3
    Moderator w8ye's Avatar
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    RE: Walbro or Tillotson Carb

    Tillotson carbs are now made in Ireland. they used to be made in the USA many years ago.

    IMHO they are as good as Walbro and Zama but are not as common anymore.

    I have a couple chainsaws with Tillotson carbs and I have not had any trouble with them that I would not have had with a Walbro for the last 13 years.
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  4. #4

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    RE: Walbro or Tillotson Carb

    Are rebuild kits as available as those for Walbro? Thanks.

  5. #5
    Moderator w8ye's Avatar
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    RE: Walbro or Tillotson Carb

    I rebuilt one of mine last year and got the repair kit at the local chainsaw dealer. He had it on the shelf.

    I see them advetised on the internet all the time by various distributors

    Tillotson has a web site with charts like Walbro and Zama that lists all the Tillotson carbs, their setttings, and the pats numbers.

    http://www.tillotson.ie/
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  6. #6
    huck1199's Avatar
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    RE: Walbro or Tillotson Carb


    ORIGINAL: w8ye

    I have a couple chainsaws with Tillotson carbs and I have not had any trouble with them that I would not have had with a Walbro for the last 13 years.
    Don't understand what you mean,

  7. #7
    Moderator w8ye's Avatar
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    RE: Walbro or Tillotson Carb

    I don't understand what you don't understand?
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  8. #8

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    RE: Walbro or Tillotson Carb

    Some people complain that Tillotson carbs are more difficult to adjust than a similar sized Walbro. No first hand experience here with a Tillotson in an airplane but I have worked with several of them in saws many years ago and couldn't see any differences for that application.

  9. #9

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    RE: Walbro or Tillotson Carb

    My thought is...the brand of a carburatordoes not matter. If you get a good one in any brand...that what counts. Capt,n
    I never met a engine I did not like !

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  10. #10
    huck1199's Avatar
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    RE: Walbro or Tillotson Carb

    I am guessing you meant that you had the same problems with both.

  11. #11

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    RE: Walbro or Tillotson Carb


    ORIGINAL: huck1199


    ORIGINAL: w8ye

    I have a couple chainsaws with Tillotson carbs and I have not had any trouble with them that I would not have had with a Walbro for the last 13 years.
    Don't understand what you mean,
    Could W8YE mean that Walbro and Tillotson (and Zama) share a common sensitivity to dirt, and more importantly, to ethanol in the gasoline? Just my SWAG.

  12. #12

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    RE: Walbro or Tillotson Carb

    JUST SAYING WHAT YOU MEAN NOW
    ANY DAY ANY TIME NOW
    JUST MEANING WHAT YOU SAY NOW
    LA LA LA LA ..... NOW

    OR SOMETHING LIKE THAT ! NOW !
    I never met a engine I did not like !

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  13. #13

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    RE: Walbro or Tillotson Carb


    ORIGINAL: captinjohn

    **** JUST SAYING WHAT YOU MEAN**** NOW
    ***** ANY DAY ANY TIME*********************** ***** NOW
    ***** JUST MEANING WHAT YOU SAY**** NOW
    *******LA* *LA LA LA .....********************** ********** NOW
    *******
    ***** OR SOMETHING LIKE THAT !********** NOW !** [img][/img]

    "Don't understand what you mean, "[8D]

  14. #14

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    RE: Walbro or Tillotson Carb

    Tilotson carbs are fine.. Way way back a couple of manufacturers converting chainsaw motors were using the tillitson carbs that came with the powerheads they were buying.. These carbs had the RPM limiter circut start to kick in inflight and make the motor run erratic.. Once they figured out what was happening they started buying walbros cause they were cheaper instead of buying the correct Tilotson carb for what they were trying to do... This seemed to start some myth that walbros are better...

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    RE: Walbro or Tillotson Carb

    Have had 2 friends one with a 3w 106 and one with a ZDZ 80 both had terrible starting issues an tuning issues once running using a starter it would tune and run great... Shut it down it wont restart with out adjusting the tilitson carbs... Both got fed up bought a walbrough and none have had an issue since

  16. #16

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    RE: Walbro or Tillotson Carb


    ORIGINAL: matt43

    Have had 2 friends one with a 3w 106 and one with a ZDZ 80 both had terrible starting issues an tuning issues once running using a starter it would tune and run great... Shut it down it wont restart with out adjusting the tilitson carbs... Both got fed up bought a walbrough and none have had an issue since
    I wonder....did the equipment the tilitson carbs do the same thing. I think NOT! There is more to this story...now where is Paul Harvey ?
    I never met a engine I did not like !

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  17. #17
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    RE: Walbro or Tillotson Carb

    Besides the Dolmar chainsaws with Tillotson carbs, I have a couple Stihl chainsaws with Tillotson carbs that I have never worked on.
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  18. #18

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    RE: Walbro or Tillotson Carb


    ORIGINAL: w8ye

    Besides the Dolmar chainsaws with Tillotson carbs, I have a couple Stihl chainsaws with Tillotson carbs that I have never worked on.
    w8ye, your knowledge base seems extensive and you often refer to chainsaws you own. Are you a saw collector? Or do you just use them often enough to need / want a variety? Just curious. I have often thought of collecting them myself.

  19. #19

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    RE: Walbro or Tillotson Carb


    ORIGINAL: matt43

    Have had 2 friends one with a 3w 106 and one with a ZDZ 80 both had terrible starting issues an tuning issues once running using a starter it would tune and run great... Shut it down it wont restart with out adjusting the tilitson carbs... Both got fed up bought a walbrough and none have had an issue since
    The various forums are full of stories similar to the above.

  20. #20
    Moderator w8ye's Avatar
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    RE: Walbro or Tillotson Carb


    ORIGINAL: Truckracer


    ORIGINAL: w8ye

    Besides the Dolmar chainsaws with Tillotson carbs, I have a couple Stihl chainsaws with Tillotson carbs that I have never worked on.
    w8ye, your knowledge base seems extensive and you often refer to chainsaws you own. Are you a saw collector? Or do you just use them often enough to need / want a variety? Just curious. I have often thought of collecting them myself.
    I have a good many more popular professional chainsaws from the late 90's up to the present but no strato versions of anything.

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  21. #21

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    RE: Walbro or Tillotson Carb


    ORIGINAL: spaceworm


    ORIGINAL: huck1199


    ORIGINAL: w8ye

    I have a couple chainsaws with Tillotson carbs and I have not had any trouble with them that I would not have had with a Walbro for the last 13 years.
    Don't understand what you mean,
    Could W8YE mean that Walbro and Tillotson (and Zama) share a common sensitivity to dirt, and more importantly, to ethanol in the gasoline? Just my SWAG.

    I have both carb, and use 10% enthanol 89 oct with lawnboy ashless........NEVER had a problem with either.

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  22. #22

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    RE: Walbro or Tillotson Carb

    Sometimes the best carb for your engine is not the one supplied by the manufacturer, sometimes there is nothing wrong with the carb or make, but simply the venturi size does not suit the engines design.

    I have swapped "bad carbs" onto another brand engine and ended up with a great running engine and more rpm than what was supplied by the manufacturer.

    I find its worth experimenting with diferent carb/engine set ups as the carb can make a huge difference to power output and how a motor runs.


  23. #23

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    RE: Walbro or Tillotson Carb

    I think it may be a good Idea sometime to start a new thread. Subject...Good Carb swaps !
    I never met a engine I did not like !

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  24. #24
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    RE: Walbro or Tillotson Carb

    +1
    With airplanes, keep the pointy end going forward as much as possible.


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