McCulloch MAC 838 Spark Plug, To Sharpen Chain, Chain Sharpening, Tools required, Right Corner

Page 14

Replace guide bar when the groove is worn, the guide bar is bent or cracked, or when excess heating or burring of the rails occurs. If replacement is necessary, use only the guide bar specified for your saw in the repair parts list or on the decal located on the chain saw.

SPARK PLUG

The spark plug should be replaced each year to ensure the engine starts easier and runs better. Ignition timing is fixed and non- adjustable.

1.

Loosen 3 screws on cylinder cover.

2.

Remove the cylinder cover.

3.

Pull off the spark plug boot.

4.

Remove spark plug from cylinder and

 

discard.

TO SHARPEN CHAIN:

1.Move ON/STOP switch to the STOP position.

2.Check chain for proper tension. Adjust chain tension if necessary.

3.Sharpen cutters.

STo sharpen the cutters, position the file holder level (90˚) so that it rests on the top edges of the cutter and depth gauge.

NOTE: The chain has both left and right hand cutters.

File Holder

File

5. Replace with Champion RCJ--7Y spark

plug and tighten securely with a 19 mm

Cutter

90˚

 

socket wrench. Spark plug gap should

 

be 0,5 mm.

6.

Reinstall the spark plug boot.

7.

Reinstall the cylinder cover and 3

 

screws. Tighten securely.

Cylinder

Cover

Spark

Plug Boot

Spark

Plug

CHAIN SHARPENING

WARNING: Improper chain sharpen- ing techniques and/or depth gauge mainte- nance will increase the chance of kickback which can result in serious injury.

WARNING: Wear protective gloves when handling chain. The chain is sharp and can cut you even when it is not moving.

Conditions which indicate the need for chain sharpening:

SReduction in size of wood chips. The size of the wood chip will decrease as the chain gets duller until it becomes more like a powder than a chip. Note that dead or

rotted wood will not produce a good chip.

SSaw cuts to one side or at an angle. S Saw has to be forced through the cut.

Tools required:

S5/32 inch (4 mm) diameter round file and

file holder

SFlat file

SDepth gauge tool

Depth Gauge

SAlign the 30˚ file holder marks paral- lel with the bar and to the center of the chain.

Cutter

30˚

Cutter

File Holder Line

 

SSharpen cutters on one side of the chain first. File from the inside of each

cutter to the outside. Then, turn the chain saw around and repeat the pro- cess for the other side of the chain.

SFile on the forward stroke only. Use 2 or 3 strokes per cutting edge.

SKeep all cutters the same length

when filing.

SFile enough to remove any damage to cutting edges (side plate and top plate of cutter).

All Cutters

Remove Damage

Same Length

 

 

Top Plate

 

Side Plate

SFile chain to meet the specifications as shown.

80˚60˚

30˚

Hook Angle

0,65 mm

Rounded

Right Corner

14

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Contents Rev 7/15/09 BRW Identification What is WHAT? Identification of SymbolsOperate Your SAW Safely Safety RulesPlan Ahead ShoesHandle Fuel with Caution Chain SAW Safety EquipmentMaintain Your SAW in Good Working Order Maintain Control KickbackReduce the Chance of Kickback Avoid Pinch-KickbackElbow locked Kickback Safety FeaturesElbow locked Thumb on underside of handlebar Guide bar up and back toward the operatorAttaching the BAR & Chain AssemblyAttaching the Bumper Spike Before Starting Engine BAR and Chain Lubrication Adjusting the tensionOperating Your Unit Fueling EngineStarting a Warm Engine Chain BrakeImportant Points to Remember Right Foot Through Rear HandleImportant Points Cutting MethodsChain Brake Tree Felling TechniquesCutting a Fallen Tree Felling Large TreesNotch CUT and Felling the Tree Important pointsLimbing and Pruning Important Points Bucking Using a LOG or SUP- Port StandBucking Without a Support LimbingBAR Maintenance Service and AdjustmentsCleaning the air filter AIR FilterChain Sharpening Spark PlugTo Sharpen Chain Tools requiredWrong Carburetor AdjustmentStorage EC Declaration of Conformity Only applies to Europe Troubleshooting Table Cause RemedyDeclaration of Conformity Technical Data Sheet Page Page Husqvarna AB SE--561 82 Huskvarna Sweden

MAC 838 specifications

The McCulloch MAC 838 is a robust lawn mower designed for homeowners seeking efficiency and reliability in maintaining their gardens and yards. Known for its powerful performance, this model incorporates several features and technologies that enhance its usability and effectiveness in various mowing conditions.

One of the standout features of the MAC 838 is its high-performance engine. It is equipped with a reliable 38cc 2-stroke engine that provides ample power for cutting through thick grass and tackling uneven terrain. This engine is designed for easy starting, ensuring that users spend less time troubleshooting and more time mowing.

The MAC 838 offers a generous cutting width of 16 inches, making it suitable for medium to large yards. This wider blade allows for quicker mowing sessions, reducing the overall time spent on yard work. Moreover, the cutting height is adjustable, with multiple settings that range from 1 to 2.5 inches. This flexibility allows users to customize their mowing experience based on grass type and desired lawn height.

Another impressive characteristic of the McCulloch MAC 838 is its ergonomic design. The handle is adjustable, providing comfort and ease of use for operators of different heights. Additionally, the mower is designed to be lightweight, which enhances maneuverability and reduces fatigue during extended use. The user-friendly controls are intuitively located, allowing for smooth operation.

The MAC 838 also features a robust cutting deck made from durable materials that ensure longevity. Its design not only supports efficient cutting but also facilitates easy cleaning and maintenance. After mowing, users can simply wash the deck with a hose to remove grass clippings, keeping the mower in optimal condition.

Safety is a priority with the McCulloch MAC 838. It includes safety features such as a blade brake system that stops the blade quickly when needed, preventing accidents. This added layer of security assures users that they can operate the mower confidently.

In summary, the McCulloch MAC 838 delivers a combination of power, efficiency, and user-friendly features. Its durable construction and innovative technologies make it an excellent choice for those who value a reliable mower that performs well in various conditions. With its adjustable settings and ergonomic design, the MAC 838 stands out as a practical solution for lawn care needs.
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