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Tool Talk Discussion Forum

Mcculloc Chainsaw

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David in TN

08-03-2007 05:04:43




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I have a Mcculloc pm610 that I just bought a couple of weeks ago. It is an older saw but had been used very little. It runs good...once you get it warmed up and keep it running. It fouls the plug very easy when you're trying to start it. If it don't start in 2 or 3 pulls, you have to pull the plug and dry it off and once it starts, if you let it die you have to pull the plug. The dang thing will wear you out before you ever get to a tree. Anybody know what I need to look at? I don't know anything about these carbs, so I thought I'd ask before I dig in. One guy already told me to sell it and get a husky...

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CRUSADER

08-11-2007 07:58:29




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 Re: Mcculloc Chainsaw in reply to David in TN, 08-03-2007 05:04:43  
The best way to maintain that McCollough Chainsaw is to go to your local Stihl or Poulan Dealer (not a boxstore) and buy either a Stihl or Poulan chainsaw. Then when you get home with said saw, take the McCollough and place it in the nearest trash can. Headache and problems are solved.



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JT

08-04-2007 06:15:25




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 Re: Mcculloc Chainsaw in reply to David in TN, 08-03-2007 05:04:43  
The first thing to do before you spend a lot of time and money is to do a compression test. It sounds as though you might also have low compression. If the saw has sat for a long time, the rings could be stuck in the piston grooves. that is something we run into on a lot of the older saws that run a pretty thick fuel/oil mixture. They get stuck from excess carbon. If that is over 90#, then that is good, if it is below 90#, then you are on the low end of good compression for a 2 cycle engine to run. if you have good compression, then check fire, put an NGK plug in it, that is the only ones we have good luck with 2 cycle engines, Champions do not really hold up well any more. The carb could be an issue, but if it will eventually run and run good, I doubt the carb could be the issue, other wise it would not have any power. does it smoke a LOT when it is running? if it is not smoking a lot, then it probably is not the carb, if it is smoking a lot, then you might lean the carb a little. Normally carb issues are the oposite, they are starving for fuel, not getting too much.
Jim

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Gerald J.

08-03-2007 20:39:37




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 Re: Mcculloc Chainsaw in reply to David in TN, 08-03-2007 05:04:43  
Use it while it works, but when it needs a Mcculloch part, land fill it. The name seems to get sold every couple years and the new maker doesn't buy any parts or manuals and declines to have any information on those he didn't make.

Gerald J.



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TimV

08-03-2007 06:35:50




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 Re: Mcculloc Chainsaw in reply to David in TN, 08-03-2007 05:04:43  
David--adding to the advice already given, you may want to double-check your mix ratio (I believe 40:1 is what's recommended for these saws) and ensure that the correct spark plug is installed. If it's used very little, chances are it has the factory plug, but it's a quick check seeing as how you seem to have the plug out on a regular basis! Recommended plugs were the Champion DJ8 and AC CS45T.

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rb/ct

08-03-2007 06:35:12




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 Re: Mcculloc Chainsaw in reply to David in TN, 08-03-2007 05:04:43  
same problem with a smaller one, as said adjust the carbeurator screws, and be thankful that they are adjustable. These were excellent saws, although I broke a plastic handle on one once.



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Butch(OH)

08-03-2007 05:33:37




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 Re: Mcculloc Chainsaw in reply to David in TN, 08-03-2007 05:04:43  
The 610 series is as rugged as you will find, I own 3 of them. The minuses are weight, noise and vibration. Usualy the problem you are discribing is a diaphram or gasket probelem in the carb due to drying out or alcohol in the gas but could be a simple adjustment problem. Next time you run the saw have a small screwdriver at hand and try turning the idle mixture screw in (lean) to see if it improves things. Base settings are 1 turn out from the seat for the idle mix and same for high speed, if your carb needs to be set more than half a turn from base settings you have problems that need attended to. Rebuilding the carb is pretty basic and kits can be had from any shop worthy of being called a saw shop, NAPA or 100s of internet parts sources. New 610 carbs (there are two different ones) show up on Ebay all the time for cheap money too. The kits do not come with drawings but they along with numerous places to buy the kit can be found on the internet by simply punching in your carb make and model on a search.

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havvey

08-03-2007 05:32:33




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 Re: Mcculloc Chainsaw in reply to David in TN, 08-03-2007 05:04:43  
Sounds like a carb issue go to chainsaw shop any good one can fix it. Also look at the fire and the setting on the electronic box. Last, saw should be pressure checked for bad seals gasket leaks a shop can do this.



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