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Husq 266XP drive me to drink. Tequila's good, but...

Discussion in 'Chainsaw' started by Rick Stephens, Jan 8, 2019.

  1. Rick Stephens

    Rick Stephens ArboristSite Operative

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    I did not kit the AM replacement carb, although I did completely disassemble several times and check it through, run the ports. The original Tillotson was kitted

    Grand idea. If was my saw, I would not have stuck an AM carb. Owner wanted, or at least pointed out, the cheap solution.

    When I get time, I am going to pull the AM carb, swap the throttle shaft back over to the original Tillotson and try it again. That has a new carb kit in it, owner had purchased and installed. From looking at the needle lever, his kit appears to be typical AM chinese junk, so I may find a Tillotson kit and try again.


    Thanks to all. I will be back. My apologies for the slow progress, I am building a new welding business up and my time is not in my control most days.
     
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  2. Czed

    Czed Addicted to ArboristSite

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    I know the feeling I've had overall good results with am carbs
    But the ones that didn't work couldn't be fixed
     
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  3. SteveSr

    SteveSr ArboristSite Guru

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    That OEM throttle shaft not being there may be the issue to not being able to set the part throttle starting position which would make cold starting very difficult. That is how Stihl's work. Not sure about Huskys
     
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  4. Rick Stephens

    Rick Stephens ArboristSite Operative

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    What happened, is I took the OEM throttle shaft, plate and linkage off the OEM carb and installed on the AM carb. The AM carb has diferent linkage and idle screw. In fact the OEM link above also has the wrong one. This saw has an idle screw installed in the saw case that rides against a angled tab on the linkage. All the replacement carbs I have seen have an idle screw mounted on the carb. There is no access for that type to adjust it, so I pulled a swap. There is literally no connection from choke to throttle plate at all. even on the original carburetor.

    THanks!

    Rick
     
  5. Old2stroke

    Old2stroke Never too many toys

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    Is there some other way of advancing the throttle for cold starting and fast idle? Two stroke engines with these type of carbs will usually NOT start with a closed throttle. Also, when an engine is hot and won't start at idle setting with 2 or 3 pulls, the throttle has to be advanced or you can pull for a long time to get it started.
     
  6. Sam R

    Sam R 8mm Socket

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    The Homelite SXL has a cruise control button, does this have something like that? Maybe your saw is just touchy; 250s can flood after about 2 pulls on full choke, for example. I've seen so many of those come back to the shop "Don't run." because they yanked on it full choke so many times they got a swimming pool in the clamshell.
     
  7. albert

    albert Addicted to ArboristSite

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    It should have a fast latch on the rear handle, in front of the interlock.
    Squeeze the throttle and pull it back with your thumb
     
  8. Rick Stephens

    Rick Stephens ArboristSite Operative

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    You are correctomundo. I missed that entirely. It is old and really touchy, but it does what you say. I was giving it full throttle in the cut to try and start. This is more better!

    Absolutely. Now I need it to start when i pull it cold, hot, warm or whatever. Fun stuff. I don't give up though.
     
  9. Bret4207

    Bret4207 ArboristSite Guru

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    Just a thought, does this 266 still have the factory screen in the muffler? Have you been inside the muffler to make sure it's open and clean and not full of mud daubers nests and such?

    My money is on the trigger not being locked halfway open as a main problem. Also, check the carb mounting block that goes to the jug and make sure the holes all line up right and are clear.
     
  10. Rick Stephens

    Rick Stephens ArboristSite Operative

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    Went back to carburetor basics. Started over on the original Tillotson OEM carb. Reset the needle lever according to da book. Re-did the cleaning. Reset the adjustments to 1 turn. Pulled the throttle shaft and plate back out of the AM carb and installed back. Replaced the spark plug, just to make sure.

    @Bret4207 - I had made gaskets for the manifold earlier. Spent an unseemly hour or so making those perfect. This saw leaked EVERYWHERE when I got it. It has no leaks and the passages line up.

    Good news is, tequila still tastes excellent even when this dang saw RUNS. I took apart the handle and cleaned and adjusted the high idle as noted, so it would actually hold. Only thing I see is the carb adjustments are really sensitive. I'll spend some time with a tach on it next, then get it set in the cut before going back to its owner.

    Thank you all for the great advice. Motto: Never quit!

    Rick
     
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