Question about McCulloch 16 In 4.5 Hp Electric Chainsaw With Carrying Case MCC4516FK
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Posted on Jan 02, 2017
SOURCE: 39cc McCulloch chain saw
The issue sounds just like a carburetor problem. I had a saw that did the same exact thing, and found that I hadn't been adjusting the carburetor properly for years. I managed to find the instructions on-line, and then it ran like a dream, just every time I store it, I have to go back through the motions again.
Let me know if you need adjustment guidance and I will see if I can dig up anything.
Posted on Oct 04, 2008
One of our group of experts suggested stuffing knotted, thin rope into the spark plug hole so that the piston could not rise all the way. The other way is to use an impact wrench (left-hand threads) to turn in direction of chain motion.
Posted on Jul 08, 2009
There are no hard and fast settings.
A good initial starting point for the "H" and "L" needle valves are 1.5 turns CCW from lightly seated.
The "T" adjustment enters here (idle speed) and there is no initial setting without a tachometer, depending on age of your saw there may not be any initial "T" setting.
The "L" needle is primarily idle performance (not speed) and acceleration to full throttle.
The "H" is mostly performance at speed, but all are interconnected.
Start with a fresh mix of fuel. Put ALL of the old mix in any 4 cycle engine and start new. I suggest 50:1 regardless of what your manual says.
• CW is leaner; to lean will destroy the saw. If over tightened closed (CW) the adjustment screw faces are easily marred; once marred adjustments are difficult to impossible to set properly.
• Clean the air filter; adjusting with a dirty filter can cause a run lean condition once cleaned and the saw run.
• Clean the spark arrestor and muffler; if the saw cannot exhale it cannot inhale.
Now we adjust for performance. The best performance adjustment procedure I have found follows.
Madsens Shop & Supply, Inc. Carburetor adjustment (All saws homeowner and professional are the same)
http://www.madsens1.com/saw%20carb%20tune.htm Read step 4 (allow it warm before making adjustments).
• There are 2 wav (sound - idle & full - may not be highlighted) files that I find most helpful, I think you will too.
I am going to inject a little philosophy here. Undetected air leaks and defective fuel delivery systems account for most chainsaw failures. Constant adjustment of needle valves can easily camouflage more serious problems that result in burning up your saw. A sudden need for an adjustment is often indicative of a larger problem.
If push comes to shove a local saw shop (I prefer Stihl mechanics and do not own a Stihl) should be considered.
If you have more questions or need additional help please reply below and I will get back to you. HTH & Good Luck.
Thank You for using FixYa.
Posted on Jul 09, 2010
Does the chain turn freely by hand? Is it being oiled properly? Check the fuel filter, air cleaner, and muffler for plugging. Does 'feathering' the choke make any difference? If it helps, try turning the H jet needle CCW about 1/4 turn which should make it run more rich and 4-stroke until you are cutting which should immediately cause the engine to 2-stroke. Hope some of this helps!
Posted on Jul 23, 2010
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