Yard-Man 769.01408 manual Carburetor Adjustment, Replacing the Spark Plug

Page 18

CARBURETOR ADJUSTMENT

The idle speed of the engine is adjustable through the air filter/muffler cover (Fig. 29).

NOTE: Careless adjustments can seriously damage your unit. An authorized service dealer should make

carburetor adjustments. Check Fuel Mixture

Old and/or improperly mixed fuel is usually the reason for improper unit performance. Drain and refill the tank with fresh, properly-mixed fuel prior to making any adjustments. Refer to Oil and Fuel Information.

Clean Air Filter

The condition of the air filter is important to the operation of the unit. A dirty air filter will restrict air flow and change the air/fuel mixture. This is often mistaken for an out of adjustment carburetor. Check the condition of the

air filter before adjusting the idle speed screw. Refer to Air Filter Maintenance.

Adjust Idle Speed Screw

WARNING: Thisunitwillneed

to be running during

idle speed adjustment. Wear protective clothing and observe all safety instructions to prevent serious personal injury.

Also, DO NOT set unit on any surface except a clean, hard area while starting or performing any adjustments. Debris such as gravel, sand, dust, grass, etc. could be picked up by the air intake and thrown out by the discharge opening, damaging unit, property, or causing serious injury to bystanders or operator.

If after checking the fuel mixture and cleaning the air filter the engine still will not idle, adjust the idle speed adjuster as follows.

1.Start the engine and let it run at the fast position for a minute to warm up.

2.Set the blower/vacuum mode change-over lever to

the up position (Blower Mode). Refer to Operating as a Blower.

NOTE: Setting the lever to the blower mode prevents the vacuum bag from filling up while starting or running the unit.

3.Move the throttle control and let the engine idle. If the engine stops, insert a small phillips screwdriver into the hole in the air filter/muffler cover (Fig. 29). Turn the idle speed adjuster in, clockwise, 1/8 of a turn at a time (as needed) until the engine idles smoothly.

4.If the unit appears to be idling too fast, turn the idle speed adjuster counterclockwise 1/8 of a turn at a time (as needed), to reduce idle speed.

Checking the fuel mixture, cleaning the air filter, and adjusting the idle speed should solve most engine problems.

If not and all of the following are true:

,the engine will not idle

,the engine hesitates or stalls on acceleration

,there is a loss of engine power

Have the carburetor adjusted by an authorized service dealer.

Idle Speed Screw

Fig. 29

REPLACING THE SPARK PLUG

Use a Champion RDJ7Y spark plug, or equivalent. The correct air gap is 0.020 inch (0.5 ram). Remove the plug after every 25 hours of operation and check its condition.

1.Stop the engine and allow it to cool. Grasp the plug wire firmly and pull it from the spark plug.

2.Clean around the spark plug. Remove the spark plug

from the cylinder head by turning a 5/8-inch socket counterclockwise.

3.Replace a cracked, fouled or dirty spark plug. Set

the air gap at 0.020 in. (0.5 ram) using a feeler gauge (Fig. 30).

WARNING: Do not sand blast, scrape or clean

electrodes.Gritinthe engine could damage the cylinder.

4.Install a correctly-gapped spark plug in the cylinder

head. Tighten by turning the 5/8-inch socket clockwise until snug.

If using a torque wrench torque to: 110-120 in.. lb. (12.3-13.5N.m)

Do not over tighten.

0.020 in.

(0.S ram)

1

Fig. 30

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Contents MTD Cycle Gas Mulching Blower/VacuumContents Product REFERENCES, Illustrations and SpecificationsService Information Spark Arrestor NoteSafety ALERT. danger Safety Warnings for GAS UnitsSymbol Meaning While Operating Unit AS a Vacuum While OperatingWhile Operating Unit AS a Blower Other Safety Warnings Meaning ManualApplication Attaching and Removing BLOWER/VACUUM Tube Shoulder strap is an optional accessory Attachingand RemovingthevacuumbagOIL and Fuel Mixing Instructions Unleaded GAS Cycle OIL GallonLiter Mixing Ratio Starting Instructions Operating AS a Blower Holding the BLOWER/VACUUMOperating Tips Start the engine. See Starting/Stopping InstructionsMode Operating AS a VacuumStart engine. See Starting/Stopping Instructions Change-overlever -rWarnin G. Toavoidseriouspersonal injury Patio HeadEmptying the Vacuum BAG Clearing a Blocked Tube / ImpellerRemoval AIR Filter Maintenance Maintenance ScheduleFrequency Maintenance Required Refer to Spark Arrestor Maintenance WairRrestor Carburetor Adjustment Replacing the Spark PlugStorage Cleaning the UnitCleaning the Vacuum BAG TransportingCause ActionRPM Page California / EPA Emission Control Warranty Statement MTD LLC Manuel Important NE PAS Jeter Souffleuse Aspirateur Dechiqueteuse TempsTable DES Matires Tous NOS RemerciementsNformations Dentretien Avertissement DE LA Proposition 65 DE CalifornieSymbole Signification Mise EN Garde le nonAvant Utilisation Pendant Lutilisation Lors DE Lutilisation EN Souffleuse Lors DE Lutilisation EN AspirateurAutres Avertissements DE S¢CURIT¢ Lisez Manuel DE Lutilisateur Usage LevierAvertissement eviter des Avertissement PourHarnais est un accessoire facultatif AVERTiSSEMENT toujoursle95 ml AVERTISSEMENTleEnlevezAVERTiSSEMENT Ajoutez 20ZAvertissement Pour eviter Avertissement nutiiiserioutiiInstructions Darret Avertissement pour Utilisation DE LA SouffleuseUtilisation Comme Aspirateur Demarrez le moteur Voir Instructions de demarrage et darrtDaspirateur Avertissement Evitez les AVERTISSEIVlENT AfinAVERTiSSEMENT Enrant LA Tete Pour TerrasseAVERTISSEIVIENTPoureviter Programme Dentretien Avertissement poureviterNettoyage DU Filtre a Aire Entretien RequisAVERTISSEMENTsi Entretien DU PARE-iTINCELLESRemplacement DE LA Bougie Avertissement LappareMise EN Garde evitezde Nettoyage Nettoyage DU SAC DaspirateurTransport Solution CauseVidez le sac, voir Vider/e sac daspirateur ¢lectronique F22 F23 Garantie Limitee DU Fabricant Pour Soplador / Aspirador Triturador de 2 Cicios No LO DesecheInformacion DEL Servicio REFERENCIAS, Ilustraciones Y Especificaciones DEL ProductoParachispas Numero delAdvertencia Lagaso,na Advertencia elnoPrecaucion el no seguir Peligro ElnoobedecerunaMientras Opera Como Sopladora Durante LA OperacionArranque y Apagado Mientras Opera Coivio AspiradoraApagado Advertencia Simbolos DE SeguridadInternacionales RapidaAdvertencia Paraevitar Conexion Remocion DEL Tubo DELSoplador Aspirador HeJ?? Scomb os Conexion Y Remocion DE LA Bolsa DEL AspiradorAdvertencia Saque Precaucion Para que elADVEffTENCIA La Advertencia Cargue elInstrucciones DE Arranque Advertencia UseestaunidadAdvertencia Evite los Intrucciones DE ApagadoConsejos Otiles Sobre LA Operacion Advertencia ParaevitarSostenimiento DE LA SOPLADORA/ Aspiradora Operacion DE LA Unidad Como SopladorOperacion DE LA Unidad Como Aspirador Patio Head Advertencia Paraev tarAdvertencia Evite La seccion Operacidn como aspiradora de su manualAdvertencia Use Vaciado DE LA Bolsa DEL AspiradorMantenimiento DEL Filtro DE Aire ParaevitarPrograma DE Mantenimiento Inadecuado o puedeMantenimiento DEL Parachispas IncluyePrecaucion No,mp e Cambio DE LA Bujia DE EncendidoLimpieza DE LA Bolsa DEL Aspirador Advertencia ParaAlmacenamiento Almacenamiento ProlongadoAccion CausaCausa AccionEnfriadoporaire,de2ciclos Sus Derechos y Obligaciones de la Garantia Responsabilidades de Oarantia de los PropietariosItem Part No Housing Parts Model YMGBV3100 GARANTiA Limitada DEL Fabricante Para

769.01408 specifications

The Yard-Man 769.01408 is a versatile and efficient riding lawn mower designed to cater to the needs of homeowners with medium to large yards. Known for its robust build and user-friendly features, the 769.01408 stands out in the market, making lawn care a more enjoyable task.

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The cutting deck measures 42 inches, which provides an ideal width for maneuvering through tight spaces while still being efficient. The three adjustable blades allow for customizable cutting heights, giving users the flexibility to achieve their desired lawn length. Moreover, the mower incorporates a side discharge feature, enabling the grass clippings to be ejected directly onto the lawn, promoting natural fertilization.

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In summary, the Yard-Man 769.01408 combines power, efficiency, and convenience with a focus on safety and durability, making it an excellent choice for homeowners looking to maintain their lawns effortlessly.
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