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McCulloch Chain Saws

Discussion in 'Chainsaw Stickies' started by Bruce Hopf, Jun 28, 2008.

  1. Jethro 2t sniffer

    Jethro 2t sniffer Addicted to ArboristSite

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    Yeah I just leave Ebay on USA for saw parts. It's hard to see from that angle but it looks like you may have an sdc 44 in there. When you get this going you will keep running it from time to time guaranteed lol the sound alone is addictive
     
  2. Jethro 2t sniffer

    Jethro 2t sniffer Addicted to ArboristSite

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  3. davidtown

    davidtown ArboristSite Member

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    I have two questions.

    1:. Should I helicoil the cylinder or go the next size up? It is stripped and leaks air. IMG_20190523_152555.jpg
     
  4. davidtown

    davidtown ArboristSite Member

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    2nd: The saw is leaking air out of the oiler hole. What do I need to do to solve this? There is a oiler rebuild kit on eBay. Or is it something else? IMG_20190523_143643.jpg
     
  5. davidtown

    davidtown ArboristSite Member

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    I had another oil tank and that one didn't leak out the oiler but it is black and I need another working tank.
     
  6. PogoInTheWoods

    PogoInTheWoods Don't forget about the alligators...

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    I'd just use a heli-coil for the bracket threads.

    There are only so many ways air can get into the oil tank (and back out). Here's a rundown on the oil pumps and what to inspect. If air is getting into the oil tank from the crankcase it's probably getting through the check valve setup at the pulse passage. Drain the oil, pull the tank cover, test again, then tear into it. Should find your problem fairly quickly.
     

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  7. davidtown

    davidtown ArboristSite Member

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    Thanks. I ended up heading to the hardware store for a longer bolt. Seems to be working without running into the crank. I'll keep looking at the oil tank. Appreciate it.
     
  8. Little Jerrry

    Little Jerrry ArboristSite Member

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    Can anyone tell me whether the 7-10A clutch is threaded on or just held on by the retaining nut?

    I have the nut off and the 10-10 manual seems to think I can soft hammer the underside of the clutch hub and it will all come off but I'm not having much success....and I'm not to keen to go too hard on it otherwise I might do damage.
     
  9. heimannm

    heimannm Addicted to ArboristSite

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    The shaft is tapered. On early models with a RH nut there is a key. Later models with a LH nut just relied on the taper.

    Put the nut on the shaft and give it a solid rap with a hammer while supporting it by the clutch.

    Mark
     
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  10. Little Jerrry

    Little Jerrry ArboristSite Member

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    Perfect...I had an old auto puller that never fit anything that was perfect for this....

    If the clutch side has a counter clockwise nut to tighten would it logically mean the same for the flywheel side as it's proving difficult to remove the nut? In my ignorance I may have damaged the spark plug thread using a piston stop to try and remove it.

    Also, is McCulloch an American brand....are all the threads imperial?
     
  11. 2broke2ride

    2broke2ride ArboristSite Guru

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    Normal righty tighty threads on the flywheel.
    All threads are sae except the spark plug.
     
  12. heimannm

    heimannm Addicted to ArboristSite

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    Thanks to Fossil for finding these for me. Not only that, but he cleaned them up, packed them up, and brought them across the border to mail them and save a lot on shipping expenses.

    The Super 250 is the Canadian made yellow top version, and the Mini Mac is the 25, mid series model with the brake (flag handle). Both of these were missing from my collection and both are very nice examples of saws that did some work and were retired before they were slap wore out.

    20190524_181713.jpg

    20190524_181757.jpg

    20190524_181804.jpg

    Mark
     
  13. Little Jerrry

    Little Jerrry ArboristSite Member

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    Any tips for getting off the flywheel nut? I've put the butane torch on it for a while to no avail and im nervous about breaking the flywheel fins. Is it normal for it to be so tough to remove on an old saw?
     
  14. vinnywv

    vinnywv Tinkerer

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    Yes they can be buggers....i use an impact driver with a socket adapter on it. Works great. Dewalt brand, used for driving fasteners. Be sure to go thr right direction though or you could break the threads off. Usually you wouldnt have to secure it, the action of the impact is.usually enough to loosen it up.
     
  15. 2broke2ride

    2broke2ride ArboristSite Guru

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    I use a 3/8 impact gun. Cant speaknfir a manual way to remove. I would not pry on the fins however.
    I've used a length of starter rope in the plug hole to act as a piston stop to remove clutches so that might work.
     
  16. Little Jerrry

    Little Jerrry ArboristSite Member

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    Thanks guys.....turns out the old rope in the plug hole was sufficient after putting a bit of heat on it....the rest of the dismantling should be relatively easy

    Playing with these old saws is a lot more enjoyable after they are stripped and cleaned thats for sure
     
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  17. Jethro 2t sniffer

    Jethro 2t sniffer Addicted to ArboristSite

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    How's that cylinder?

    Finally got me a big bar on the 800.
    Hope she can pull it with full comp cos thats what came with it. It is a mac bar too just paint gone 20190525_142959.jpg
     
  18. Little Jerrry

    Little Jerrry ArboristSite Member

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    I'm really happy with the cylinder all things considered....I've got it in my ultrasonic cleaner now to clean off 50+ years of crud...a 7-10A is a 60's saw yeah? I'll snap a pic later to get a more experienced opinion but at the end of the day it doesn't really matter because the likelihood of getting another good cylinder is minimal.

    It's surprising how many screws / bolts get hidden underneath filth....the head wouldn't come off and it took a few minutes with a screw driver scraping **** off to find that last hidden bolt.

    The bearings / seals seem decent as well not that im an expert at telling if an oil seal is junk.
     
  19. sawfun

    sawfun Addicted to ArboristSite

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    That 800 should have no trouble with that length bar.
     
  20. Little Jerrry

    Little Jerrry ArboristSite Member

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    Anyone know if a muffler off a more modern (read more readily available to buy) McCulloch chainsaw would fit a 7-10A? The one I have is totally cactus, held together with wire....
     

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