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McCulloch Mini and Small CC Chainsaw's

Discussion in 'Chainsaw Stickies' started by Overtrained, Dec 24, 2012.

  1. Brian Thacker

    Brian Thacker ArboristSite Guru

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    I would be interested in a sprocket nose. 12 or 14 inch bars. I have 2 of these Power Mac 6s and both are equipped with 14" hard nose bars and I would really like to have sprocket nose bars for them.
    Brian
     
  2. heimannm

    heimannm Addicted to ArboristSite

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    It is a simple matter of changing the sprocket to 3/8 and there will be a whole range of sprocket nose bars available. All of the later saws came with 3/8" L.P. chain in favor of the 1/4".

    Mark
     
  3. astnmacgto

    astnmacgto Carnac The Magnificent

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    I have a few bars of different lengths and designs, the sprocket nose are
    1x 16 inch NOS black with yellow letters .250 .050GA
    1x 16 inch used in average condition with 1/2 life left on chain also .250 .050ga
    If you wanted to switch to .375 I have a few more options used
    ADLM
     
  4. Brian Thacker

    Brian Thacker ArboristSite Guru

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    I have thought about changing both over to 3/8" LP. The chain is cheaper when you buy it. I just have to find a couple of sprockets. Have not looked to see what fits but I am sure I can find out or someone (Mark) could tell us what size is needed. But I would like to stay with the 14" bar or maybe a 12.
     
  5. astnmacgto

    astnmacgto Carnac The Magnificent

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    I have a 12in mini bar NOS but it's a hard nose
    Also a 10 inch used hard nose
    14 used hard nose
     
  6. Brian Thacker

    Brian Thacker ArboristSite Guru

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    I have hard nose 14 on both but I prefer sprocket nose if I can find them. Thanks for trying I really appreciate the effort. I have a couple hard nose McCulloch 16" bars in alright condition if someone needs them.
     
  7. astnmacgto

    astnmacgto Carnac The Magnificent

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    That's ok they don't eat much I just wanted you to know what I have in case you were interested. I also have a bunch of nos mini mac screws, nos adjusters, nos coils, nos flywheel, nos recoil pulley and used parts as well if you ever need
     
  8. heimannm

    heimannm Addicted to ArboristSite

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    The same drum/sprockets work on all Mini Mac and Power Mac 6 saws. You should not have any trouble finding a drum with the 3/8" sprocket.

    Mark
     
  9. Brian Thacker

    Brian Thacker ArboristSite Guru

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    Thank You Mark

    Brian
     
  10. heimannm

    heimannm Addicted to ArboristSite

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    There are some differences in the clutch itself, some were held on with a nut, some had the nut built into the spider, and the diameter of the shaft/bearing changed but the external parts of the clutch are all the same. In the worst case you might have to press one bearing out and another in its place.

    Mark
     
  11. Brian Thacker

    Brian Thacker ArboristSite Guru

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    Thanks

    Brian
     
  12. Brian Thacker

    Brian Thacker ArboristSite Guru

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    Ok I have a 140 giving me trouble. It will start and run fine like first thing in the morning. You can cut with it for almost a tank of fuel, shut it off for just 3-4 mins and it will start right back up. Shut it off and do something like stack wood for like 20-30 mins and when you try and start it you have to choke it and feather the choke for a while to keep it running until finally it will take off and run. Then after that you can shut it off and let it set for 3-4 mins and it will start right up and saw but if you let it set for 15-20 mins then you have to feather the choke for a while just to keep it running until it finally starts to run right. Any ideas on this? I have kitted the carb, new crank seals, new fuel lines. Saws great until you have to shut it down for a while and then it is a pain to get back running.
    Brian
     
  13. dynodave

    dynodave equal opportunity gearhead

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    A friend gave me a mini mac eager beaver -110-2.0 cid. The air cleaner cover was missing and no where to be found. I eventually found another cover and filter but the cover hold down screw thread is in question. I only get 3 turns with a 10-24 and it bottoms out/locks up. The hole looks like striped threads about 8 threads deep.
    Is it originally 10-24 thread or metric? . It's not reassuring...
    I might do a 10-32 helicoil I don't have any 10-24's
    thanks
     
  14. heimannm

    heimannm Addicted to ArboristSite

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    The IPL simply calls it AF cover screw, PN 91796. All of the other screws I see are described as inch threads.

    Mark
     
  15. ray benson

    ray benson Tree Freak

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    Checked an eager beaver 2.0 and it is 10/32 x5/8"
     
  16. dynodave

    dynodave equal opportunity gearhead

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    I got my AF cover yesterday, came with the screw!!!!:happybanana:10-24 it is. I get 2-1/2 turns engagement in the threads.
    Got a new clutch/sprocket today, 1/4-8 matching the 14" bar(off the old/dead MM6).
    70dl too tight and 72dl too loose, so I will need to spin-up a 71dl chain.
    PHO is 9lb 5oz dry.
    No body loves these?:chainsaw:
    I do see the start pulley as a weak spot on these...mine is well worn but works........ for now!
     
  17. dynodave

    dynodave equal opportunity gearhead

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    Hey overtrained
    back in the saddle again....
    My MM6 need a few bits to get it going before I do a 5 saw comparison of my 5 smallest saws. The test will include (2)Homelite XL-2 (one 1/4" and one 3/8lp), Echo SC280EP, MM6, Poulan 1800. They all run great except...you guessed it..the MM6.

    My needs are mainly for a black handle 83852 where the long plastic screw had busted it wide open. Also a handle retaining 5/8" long screw 110640, spacer 84519 and triangular washer 84520. Also needed is the long skinny return spring 83946 at the bottom of the manual oiler push rod.
    I have a MDC carb kit, new clutch, 12" sprocket nose bar and will make up a new stihl RM13 1/4" chain upon final assembly.
    :chainsaw:
    Happy to give a contribution for mail and cost of used parts. Please PM me with what you got
    The big saws, 2 eager beavers, are also getting some attention at the same time for the next bigger group test.
    You can see the saws in my gallery... linked below

    Did more research and discovered the homelites and the poulan are reed valve intake and the Echo and MM6 are piston port. Wonder how they will perform? The MM6 carb pressure regulator diaphragm was hard as a rock and therefore renewed, and have to make a manifold gasket to reassemble.
     
  18. dynodave

    dynodave equal opportunity gearhead

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    Hey MM guys
    I got it fired up on carb prime. While studying the assembly procedure... I remembered that the insides of the case was absolutely 95% full of saw dust cake except in the direct fan blow through area around the fins.
    Then looking in front of the muffler but in the rear of the clutch cover area that it was totally open and not shielded in any way from the saw dust and chips coming off the chain. I looked the area over and saw two #12 threaded holes on the back of the barrels. It only took a few minutes and wondered if ever a properly shaped flat piece of aluminum sheet mounted on two round standoffs mounted by some #12 screws would create a"back wall" to the sprocket area?... Would the cases get so packed with dust cake? I cut a little piece of cardboard to try it on for size. Looks good to me.
    Was there ever a factory piece to do that job? It's not on the IPL....
    Still need pieces to final assemble for the test:cheers:
     
  19. Little Al

    Little Al Addicted to ArboristSite

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    If you're including the modern no idea who made it plastic "jobbies" then repairing them "You're on your own kiddo":blob2::blob2:
     
  20. dynodave

    dynodave equal opportunity gearhead

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    ^? oh well
    I have a oiler spring and handle coming for the magnesium mini mac 6

    Pix of the shield cardboard template to potentially keep out the saw dust cake from filling the body.
    I'll make one out of aluminum prior to putting the clutch and new sprocket back on.
    For complete coverage, it will include the little red area adjacent to the crankshaft.
    [​IMG]
     

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