Husqvarna Complete Guide to Adjusting Lawn Mower Carburetor for Optimal Performance
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SERVICE AND ADJUSTMENTS

TO ADJUST CARBURETOR (See Fig. 32)

The carburetor has been preset at the factory and adjust- ment should not be necessary. However, minor adjust- ment may be required to compensate for differences in fuel, temperature, altitude or load. If the carburetor does need adjustment, proceed as follows:

In general, turning idle mixture valve in (clockwise) de- creases the supply of fuel to the engine giving a leaner fuel/ air mixture. Turning the idle mixture valve out (counter- clockwise) increases the supply of fuel to the engine giving a richer fuel/air mixture.

IMPORTANT: DAMAGE TO THE NEEDLE VALVE AND THE SEAT IN CARBURETOR MAY RESULT IF SCREW IS TURNED IN TOO TIGHT.

PRELIMINARY SETTING -

•Air cleaner assembly must be assembled to the carbu- retor when making carburetor adjustments.

•Be sure the throttle control cable is adjusted properly (see above).

•With engine off turn idle mixture valve in (clockwise) closing it finger tight and then turn out (counterclock- wise) 1 full turn.

FINAL SETTING -

•Start engine and allow to warm for five minutes. Make final adjustments with engine running and shift/motion control lever in neutral (N) position.

•Move throttle control lever to slow () position. With finger, rotate and hold throttle lever against idle speed screw. Turn idle speed screw to attain 1750 RPM.

•While still holding throttle lever against idle speed screw, turn idle mixture valve in (clockwise) until en- gine begins to die and then turn out (counterclockwise) until engine runs rough. Turn valve to a point midway between those two positions. Release throttle lever.

ACCELERATION TEST -

• Move throttle control lever from slow () to fast ( ) position. If engine hesitates or dies, turn idle mixture valve out (counterclockwise) 1/8 turn. Repeat test and continue to adjust, if necessary, until engine acceler- ates smoothly.

High speed stop is factory adjusted. Do not adjust - damage may result.

IMPORTANT: NEVER TAMPER WITH THE ENGINE GOVERNOR, WHICH IS FACTORY SET FOR PROPER ENGINE SPEED. OVERSPEEDING THE ENGINE ABOVE THE FACTORY HIGH SPEED SETTING CAN BE DANGEROUS. IF YOU THINK THE ENGINE-GOVERNED HIGH SPEED NEEDS ADJUSTING, CONTACT YOUR N E A R E S T A U T H O R I Z E D S E R V I C E C E N T E R / DEPARTMENT, WHICH HAS PROPER EQUIPMENT AND E X P E R I E N C E T O M A K E A N Y N E C E S S A R Y ADJUSTMENTS.

THROTTLE

IDLE SPEED

LEVER

SCREW

 

IDLE MIXTURE

 

VALVE

FIG. 32

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Contents LT 1 2 II. Slope Operation IV. ServiceSafe Operation Practices for Ride-On Mowers General OperationModel Number LT120 Serial Product SpecificationsCustomer Responsibilities Table of Contents Contents of Hardware Pack To Remove Tractor from Carton AssemblyTools Required for Assembly HOW to SET UP Your TractorInstall Mulcher Plate See Figs Install Seat See FigCheck for Proper Position of ALL Belts To Convert to Bagging or DischargingCheck Tire Pressure Check Deck LevelnessOperation Know Your Tractor HOW to USE Your Tractor ADD Gasoline Before Starting the EngineTo Operate on Hills To TransportMulching Mowing Tips Mowing TipsBefore Each USE Lubrication ChartCustomer Responsibilities General RecommendationsTires BatteryTractor Brake OperationLubrication EngineBelts Transaxle CoolingSpark Plugs CleaningMuffler To Remove Mower See Fig Service and AdjustmentsTo Install Mower See Fig FRONT-TO-BACK Adjustment See Figs To Level Mower HousingTo Replace Motion Drive Belt See Fig To Adjust Brake See FigBelt Installation To Replace Mower Blade Drive Belt See FigFront Wheel TOE-IN/CAMBER To Adjust Steering Wheel AlignmentTo Start Engine with a Weak Battery See Fig Transaxle Shifter Linkage and AD- Justment See FigsInterlocks and Relays To Remove Hood and Grill Assembly See FigTo Adjust Throttle Control Cable See Fig To Replace Headlight BulbAcceleration Test To Adjust Carburetor See FigPreliminary Setting Final SettingEngine OIL StorageOther Fuel SystemProblem Cause Correction Troubleshooting PointsOFF Slope CUT This OUT Dotted Is aLimited Warranty Warranty StatementWiring Insulated Clips SchematicIgnition Switch Electrical KEY Part NO. NO. Description Chassis and Enclosures Repair Parts Drive KEY Part NO. no Description Steering Assembly KEY Part Description NO. no Seat Assembly KEY Part Description DecalsWheels & Tires Engine Repair Parts Mower Deck Repair Parts Mower Lift Repair Parts Peerless Transaxle Model Number 930-054A Part Description Rev 10.07.96 Kfsw

LT120 specifications

The Husqvarna LT120 represents a remarkable balance of performance, durability, and user-friendly design, making it an ideal choice for homeowners looking to maintain their lawns efficiently. This riding lawn mower is engineered with a focus on comfort and functionality, ensuring that each mowing session is as productive as possible.

One of the most notable features of the LT120 is its powerful 17.5 HP Briggs & Stratton engine. This reliable engine ensures that the mower can tackle various terrains effortlessly, offering consistent power and performance even in challenging conditions. The efficient engine design also translates into lower fuel consumption, making it a cost-effective solution for lawn maintenance.

The LT120 boasts a 42-inch cutting deck, which allows for considerable coverage in a single pass. The deck is constructed from stamped steel, ensuring durability and longevity while providing a clean, precise cut. Additionally, the cutting height can be easily adjusted to six different settings, ranging from one to four inches, giving users the flexibility to achieve their desired lawn height.

For user comfort, the LT120 features an ergonomic steering wheel and a comfortable, adjustable seat. These enhancements make it easier for users to navigate their lawns for extended periods without discomfort. The mower's compact design also contributes to its maneuverability, allowing it to reach tight spaces and corners that larger models might struggle with.

Another impressive aspect of the Husqvarna LT120 is its easy-to-use hydrostatic transmission. This technology allows for smooth and seamless speed adjustments without the need for manual gear shifting. Users can simply press the pedals to change speed and direction, making the mowing experience more intuitive and less physically demanding.

Safety is paramount in the design of the LT120. It is equipped with features such as an automatic blade engagement system, which ensures that the blades only engage when the operator is seated. Additionally, the machine includes a reverse operating system that allows users to mow in reverse safely.

Overall, the Husqvarna LT120 combines power, efficiency, and comfort, making it a superb choice for residential lawn care. With its quality construction and thoughtful design features, it provides an exceptional mowing experience, helping homeowners achieve a well-maintained lawn with ease. Whether tackling small or medium-sized lawns, the LT120 ensures that lawn care is a task that can be handled with confidence and satisfaction.
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