McCulloch MAC 838 instruction manual Operating Your Unit, Adjusting the tension, Fueling Engine

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Clutch

Cover

Adjusting Pin Lower

Hole

Guide Bar

12.Install bar nuts and finger tighten only. Once the chain is tensioned, you will need to tighten bar nuts.

CHAIN TENSION (Including units with chain already installed)

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

NOTE: When adjusting chain tension, make sure the bar nuts are finger tight only. Attempting to tension the chain when the bar nuts are tight can cause damage.

Checking the tension:

Use the screwdriver end of the chain adjust- ment tool (bar tool) to move chain around guide bar. If the chain does not rotate, it is too tight. If the chain is too loose, it will sag below the bar.

Guide

Bar

Chain Adjustment

Bar Nuts Adjusting Tool

Screw (Bar Tool)

Adjusting the tension:

Chain tension is very important. Chains stretch during use. This is especially true during the first few times you use your saw. Always check chain tension each time you use and refuel your saw.

1.Loosen bar nuts until they are finger tight against the clutch cover.

2.Turn adjusting screw clockwise until chain solidly contacts bottom of guide bar rail.

Adjusting

Screw

3.Using bar tool, roll chain around guide bar to ensure all links are in bar groove.

4.Lift up tip of guide bar to check for sag. Release tip of guide bar, then turn adjust- ing screw 1/4 turn clockwise. Repeat un- til sag does not exist.

Adjusting Screw -- 1/4 Turn

5.While lifting tip of guide bar, tighten bar nuts securely with the bar tool.

Bar Nuts

6.Use the screwdriver end of the bar tool to move chain around guide bar.

7.If chain does not rotate, it is too tight. Slightly loosen bar nuts and loosen chain by turning the adjusting screw 1/4 turn counterclockwise. Retighten bar nuts.

8.If chain is too loose, it will sag below the guide bar. DO NOT operate the saw if the chain is loose.

WARNING: If the saw is operated with a loose chain, the chain could jump off the guide bar and result in serious injury.

WARNING: Muffler is very hot during and after use. Do not touch the muffler or al- low combustible material such as dry grass or fuel to do so.

OPERATING YOUR UNIT

BEFORE STARTING ENGINE

WARNING: Be sure to read the fuel information in the safety rules before you be- gin. If you do not understand the safety rules, do not attempt to fuel your unit. Contact an authorized service dealer.

BAR AND CHAIN LUBRICATION

The bar and chain require continuous lubri- cation. Lubrication is provided by the auto- matic oiler system when the oil tank is kept

filled. Lack of oil will quickly ruin the bar and chain. Too little oil will cause overheating shown by smoke coming from the chain and/ or discoloration of the bar. Only use Bar and Chain Oil for bar and chain lubrication.

FUELING ENGINE

WARNING: Remove fuel cap slowly when refueling.

This engine is certified to operate on unleaded gasoline. Before operation, gasoline must be

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Contents Rev 7/15/09 BRW Identification What is WHAT? Identification of SymbolsSafety Rules Plan AheadOperate Your SAW Safely ShoesHandle Fuel with Caution Chain SAW Safety EquipmentMaintain Your SAW in Good Working Order Kickback Reduce the Chance of KickbackMaintain Control Avoid Pinch-KickbackKickback Safety Features Elbow locked Thumb on underside of handlebarElbow locked Guide bar up and back toward the operatorAttaching the BAR & Chain AssemblyAttaching the Bumper Spike Adjusting the tension Operating Your UnitBefore Starting Engine BAR and Chain Lubrication Fueling EngineChain Brake Important Points to RememberStarting a Warm Engine Right Foot Through Rear HandleCutting Methods Chain BrakeImportant Points Tree Felling TechniquesFelling Large Trees Notch CUT and Felling the TreeCutting a Fallen Tree Important pointsBucking Using a LOG or SUP- Port Stand Bucking Without a SupportLimbing and Pruning Important Points LimbingService and Adjustments Cleaning the air filterBAR Maintenance AIR FilterSpark Plug To Sharpen ChainChain Sharpening 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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