Mac 120 Chainsaw Manual

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The starter is designed to start the saw using a retractable pull rope assembly. The McCulloch MINI MAC 120 starter parts includes a starter pulley made of either plastic or metal. The starter rope can be different sizes depending on the size of the saw, starter puller and length desired when rope is pulled. If the rope becomes frayed, it should be replaced before it breaks. If the housing is cracked or pieces are missing, the starter cover or assembly should be replaced. Our aftermarket suitable replacement chainsaw McCulloch MINI MAC 120 starter parts meet or beat OEM specs, offer a considerable cost savings, and usually ship in 24 - 48 hours.

Suitable Replacement McCulloch MINI MAC 120 Starter Parts

The McCulloch MINI MAC 120 starter parts are designed to start the saw using a retractable pull rope assembly. The starter includes a starter pulley made of either plastic or metal. The starter rope can be different sizes depending on the size of the saw, starter puller and length desired when rope is pulled.

Performance Parts Supply parts meet or exceed OEM specifications for McCulloch MINI MAC 120 starter parts and they cost less than OEM filters while maintaining excellent quality and durability. McCulloch MINI MAC 120 Starter Parts should either be replaced or cleaned per manufacturers specifications that are located in your owners manual. You can quickly buy our suitable replacement McCulloch MINI MAC 120 Chainsaw starter parts for sale in our online store and get it shipped fast.

The chainsaw starter spring's sole function is to return the starter pulley back to neutral when the rope is pulled to start the saw. The starter housing can be made of plastic or metal and contains the starter pulley, spring and rope.

Certain starters use flywheel pawls to engage the starter pulley to start the engine. Once the engine starts, centrifugal force causes the spring to relax and the pawl moves away from the starter pulley. Other chain saws use starter pulleys that have built-in starter pawls which engage into the flywheel starter cup.

Starter handles allow the operator to pull the rope to start the saw. Handles should be selected to match the starter rope and starter grommet in the starter housing.

The starter cover allows air to enter the saw and the flywheel to blow fresh air across the cylinder to cool the chain saw engine. The cover also protects the operator by isolating the rotating flywheel from body parts or loose clothing.

Important Notice - We are not affiliated with any chainsaw manufacturers and we do not attempt to make any affiliations with them. Any manufacturer logos, model names and numbers are the sole property of their respective owners and are used here for the sole purpose of reference. We do not sell OEM chainsaw parts for any brand. We do however, offer high quality suitable replacement parts guaranteed to meet or beat OEM part specifications like our suitable replacement Chainsaw McCulloch MINI MAC 120 Starter Parts we offer for sale for you to buy and put into their brand of chainsaws.

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  • 1 Adjust a Chainsaw Carburetor Without a Bar & Chain
  • 2 Adjust a Chain Saw Carburetor with a Tachometer
  • 3 Adjust the LA Setting on a Stihl Chainsaw
  • 4 Adjust the Carburetor on an Eager Beaver Chainsaw

The McCulloch Power Mac 310 chain saw is a somewhat vintage model. It was new about the same time the first personal computers came on the market, in the mid 1980s. Like most chain saws, it has three carburetor adjustment screws, and chances are good that they need adjusting. It's a fairly simple matter to set the idle and low-speed screws, but setting the high-speed screw is challenging and shouldn't be attempted without a tachometer. Without one, it's simple to set the fuel mixture too lean and burn out the motor.

1

Remove the air box cover from the left side of the McCulloch Power Mac 310 chain saw by using a Phillips screwdriver to remove its single screw. The chain saw's left side is the side that is on your left when you operate the chain saw. Remove the air filter, and clean it with compressed air. If you can't clean it, then replace it.

2

Drain fuel from the chain saw's fuel tank, and replace it with fresh, high-octane gasoline mixed with two-cycle engine oil at a ratio of 40 parts gasoline to 1 part oil. Fill the fuel tank completely with the mixture. Otherwise, the engine might run too rich the next time you fill the tank.

3

Start the chain saw's engine, and let it warm up for about five minutes. If the carburetor is so far out of adjustment that the engine won't start, turn both the high-speed screw -- H -- and low-speed screw -- L -- clockwise as far as they will go, using a flat-head screwdriver, then turn them counterclockwise by 1 1/2 turns.

4

Turn the idle screw -- I -- clockwise until the chain starts to spin, then turn it counterclockwise slightly. Adjust the screw to find the highest setting possible without making the chain spin. Check the setting by holding a digital tachometer over the spark plug. It should read between 2,700 and 2,900 rpm.

5

Turn the low-speed screw clockwise until the engine begins to race, and make a note of that position of the screw. Turn the low-speed screw counterclockwise until the engine begins to stall, and note that position of the screw. The final setting is midway between those two positions. This adjustment may throw off the idle adjustment, and so resetting it may be necessary.

6

Engage the throttle, and while the saw is running at full speed, turn the high-speed screw clockwise until the engine races and the motor sounds thin. Turn the high-speed screw counterclockwise until the motor takes on a lustier gurgling sound without losing power. Check the engine speed with the digital tachometer. It should be fewer than 13,000 rpm.

7

Readjust both the low-speed screw and idle screw.

Things You Will Need

  • Phillips screwdriver
  • Compressed air
  • New air filter (optional)
  • High-octane gasoline
  • Two-cycle engine oil
  • Flat-head screwdriver
  • Digital tachometer

Tip

  • The clutch should engage the saw's chain by the time the engine reaches a speed of 3,800 rpm.
Mcculloch mac 120 chainsaw parts

Warning

  • Keep people and pets out of the area when making the adjustments because the chain may spin unexpectedly.

References (2)

About the Author

Chris Deziel has a bachelor's degree in physics and a master's degree in humanities. Besides having an abiding interest in popular science, Deziel has been active in the building and home design trades since 1975. As a landscape builder, he helped establish two gardening companies.

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Mcculloch Mac 130 Chainsaw Manual

Deziel, Chris. 'How to Adjust the Carburetor on a McCulloch Chain Saw Model 310.' Home Guides | SF Gate, http://homeguides.sfgate.com/adjust-carburetor-mcculloch-chain-saw-model-310-101690.html. Accessed 25 August 2019.
Deziel, Chris. (n.d.). How to Adjust the Carburetor on a McCulloch Chain Saw Model 310. Home Guides | SF Gate. Retrieved from http://homeguides.sfgate.com/adjust-carburetor-mcculloch-chain-saw-model-310-101690.html

Mcculloch Mac 120 Chainsaw Manual

Deziel, Chris. 'How to Adjust the Carburetor on a McCulloch Chain Saw Model 310' accessed August 25, 2019. http://homeguides.sfgate.com/adjust-carburetor-mcculloch-chain-saw-model-310-101690.html
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