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McCulloch Chain Saws

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

  1. fossil

    fossil Eh?

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    If it's related to the viscosity, I bought a couple of gallons of winter weight bar oil at TSC. Much thinner and works well.

    You being in Tenn may have an issue finding it.

    I find there are some advantages when living in cold climates. That's one and then there's others like....... I'll have to think on that.
     
  2. fossil

    fossil Eh?

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    Seems pretty common in saws that haven't been run for years. The ones that get used seem to help preserve the seals.
     
  3. fossil

    fossil Eh?

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    I figure of the bar is staying cool, it's working. I've tried some different brands but they all seem to work well for me.
     
  4. Matt93eg

    Matt93eg ArboristSite Operative

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    I have been using Husqvarna bar oil. It actually seems pretty thin. I got a brand a while back(can’t remember name) and it was thick. I didn’t use it.
     
  5. Little Jerrry

    Little Jerrry ArboristSite Member

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    Thanks mate, if your interested I put up some pics in the chainsaw forum of the stihl 031av I just restored, not sure whether I will go the same route with the McCulloch or just restore the mechanics and leave the original patina.
     
  6. Brian Thacker

    Brian Thacker ArboristSite Guru

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  7. Little Jerrry

    Little Jerrry ArboristSite Member

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    Hi

    Looking at online pics and parts diagrams I dont think this saw is missing anything externally apart from having a broken muffler, does this McCulloch 7-10 look like its missing any external casing especially on the underside?

    mac710 1.JPG mac 710 2.JPG mac 710 3.JPG mac 710 4.JPG
     
  8. heimannm

    heimannm Addicted to ArboristSite

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    The only thing I detect is that the clutch cover is broken.

    Mark
     
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  9. Little Jerrry

    Little Jerrry ArboristSite Member

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    Appreciate the reply, excuse my ignorance but which part of the clutch cover is broken as I'm not seeing what your seeing in the photos.

    Regards

    Adam
     
  10. heimannm

    heimannm Addicted to ArboristSite

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    I only have my phone available so I can't show it but the front, bottom corner is gone.

    Mark
     
  11. Maintenance supervisor

    Maintenance supervisor Every 100yrs, All new people...

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    Strangely enough the plastic chip screen on the starter housing looks great!
    There's an allen head srew in the starter housing that shouldn't be.
     
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  12. Little Jerrry

    Little Jerrry ArboristSite Member

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    Oh yeah, you are right.

    It was such a nice angled clean break that I hadn't noticed when I was looking at the saw - having not cleaned it yet didnt help.

    Looks like a tough part to replace so probably have to smooth out the crack line and try and make it look like the original design...although once all the dirt comes off it may look more obvious.
     
  13. Brian Thacker

    Brian Thacker ArboristSite Guru

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    Spark plug rubber boot is missing.

    Brian
     
  14. Jethro 2t sniffer

    Jethro 2t sniffer Addicted to ArboristSite

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    Nicely covered in preservative lol. Nice work on the stihl by the way.. how's the compression on that mac? It's the cylinder condition thats the major.
     
  15. Little Jerrry

    Little Jerrry ArboristSite Member

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    My cheap compression tester is telling me 77psi, which aint good...suprisingly the saw still has spark with my work colleague's dodgy makeshift ignition lead but she wont fire from my brief messing around with it and leaving the old spark plug in there.

    Is there any way to salvage this thing if the cylinder is stuffed (can you even get rings for it?) or if I pretty it up it will be destined for display only and wont be a runner
     
  16. Jethro 2t sniffer

    Jethro 2t sniffer Addicted to ArboristSite

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    Yup jump on Ebay there's everything except cylinders. Pop the carb off and have a gander at the exhaust side of the bore. 1 of my 7-10s has a couple good grooves it can hang on the pull cord for around 10 seconds and still keeps up with my fresh ringed poulan 4000
     
  17. Little Jerrry

    Little Jerrry ArboristSite Member

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    Warning - totally ignorant question ahead....from what I can see the McCulloch has its own block and head and the casing covers seem to fit around it opposed to say the Stihl 031av which has the bearings etc pressed into the casing and the casing is the block per se......My question - Can a different model head or head block combo potentially be fitted into the Mac 7-10 if the cylinder turns out to be a mess?
     
  18. Jethro 2t sniffer

    Jethro 2t sniffer Addicted to ArboristSite

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    It may not be poked yet so pull her down to see. It can be rechromed too. It could be just really warn old rings. Was the decomp valve shut? It's easy to bump and if your not used to pulling it over you may not recognize the hissing sound.

    Yes you are pretty much onto it with the construction it's simple as.

    Take the starter off put it away with its screws. Clutch cover obviously the carb next and undo the bolts underneath it and the tricky throttle linkage.

    Dump the oil crack the cap off the front theres an Alan head in there to the tank umm the brace underneath awww the handle bar obviously and booyah.

    Crack the bolts on the muffler and start cleaning and perving.

    Very simple saw do some old thread surfing and hunt around the net and you'll learn a heap real fast.

    Keep your eyes and everyone you knows eyes and ears out for more 10 series saws for a parts supply and maybe to resurrect more they can be had very cheap with a sprung spring or bad carb in old Wilber's shed kinda thing.

    It isn't as easy as that finding a cylinder off of another model its 5-10 6-10 7-10 pm700 but your not going to just find a 6-10 cylinder around and if a whole saw came up with a good cylinder ya mite as well get it running insted.

    Parts are about and old bob Johnson has 700 or 7-10 (he wasn't sure lol) cylinders sitting there for 150 or something.

    Pull it apart..... it's fun:)
     
  19. Little Jerrry

    Little Jerrry ArboristSite Member

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    Sorry Jethro, I posted the below before I saw you added heaps to your post - appreciate you taking the time to give me some of that insight.

    Appreciate your reply - Just checking - the decompression valve is pulled out to release compression (I'm going feel stupid if I got this wrong), there wasn't a lot of travel between in and out so hopefully its fully sealing....I did the compression test with wide open throttle to get the 77psi. I have another 031av to finish off (I wanted at least one 031av to actually cut with) and then i'll strip 7-10.

    I'd definately just re-ring it if the cylinder is even half decent as I just want it to run and then go on the wall - the 7-10 has a bit of rust so hopefully the internals are okay.... when you say there are heaps of parts on ebay - are you referring to NOS in the USA or is there aftermarket rings / bearings etc available as when I type McCulloch 7-10 I dont seem to get a lot in Australia anyways...any idea what carby I would have (did the Aussies / NZ's get a certain model)?
     
  20. Jethro 2t sniffer

    Jethro 2t sniffer Addicted to ArboristSite

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    Sorry kinda hit send on accident before oops
     

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