Poulan 176038 owner manual To Adjust Throttle Control Cable See Fig, To Adjust Carburetor See Fig

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SERVICE AND ADJUSTMENTS

ENGINE

TO ADJUST THROTTLE CONTROL CABLE (See Fig. 29)

The throttle control has been preset at the factory and adjustment should not be necessary. Check adjustment as described below before loosening cable. If adjustment is necessary, proceed as follows:

With engine not running, move throttle control lever from slow to choke position. Slowly move lever from choke to fast position.

Check that holes “A” in governor control lever and hole in governor plate line-up. If holes “A” are not aligned, loosen clamp screw and move throttle cable until holes are aligned. Tighten clamp screw securely.

 

GOVERNOR

GOVERNOR

 

CONTROL LEVER

 

CONTROL

 

 

 

 

PLATE

HOLES "A"

CLAMP

THROTTLE

 

SCREW

CABLE

FIG. 29

TO ADJUST CARBURETOR (See Fig. 30)

NOTE: The carburetor on this engine is low emission. It is equipped with an idle fuel adjusting needle with a limiter cap, which allows some adjustment within the limits allowed by the cap. Do not attempt to remove the limiter cap. The limiter cap cannot be removed without breaking the adjust- ing needle.

The carburetor has been preset at the factory and adjust- ment should not be necessary. However, minor adjustment 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).

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 full travel clockwise then counter- clockwise 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 accelerates 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 T H E F A C T O R Y H I G H S P E E D S E T T I N G C A N B E 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.

IDLE SPEED

THROTTLE

SCREW

LEVER

IDLE MIXTURE

VALVE WITH

LIMITER

FIG. 30

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Contents Model NO. PO14542B Safe Operation Practices for Ride-On Mowers Safety RulesTable of Contents Customer Responsibilities Product SpecificationsKeys Unassembled PartsSteering Wheel Seat Before Removing Tractor from Skid AssemblyTools Required for Assembly To Remove Tractor from CartonInstall Seat See Fig HOW to SET UP Your TractorCheck Battery See Fig Check Brake System Check Tire PressureCheck Deck Levelness Check for Proper Position of ALL BeltsOperation Know Your Tractor HOW to USE Your Tractor Towing Carts and Other ATTACH- Ments Before Starting the EngineTo Operate on Hills To TransportTo Start Engine See Fig Mowing TipsADD Gasoline Before Each USE ¿ Lubrication ChartCustomer Responsibilities General RecommendationsOperator Presence System TractorBrake Operation TiresTransaxle Cooling BatteryEngine BeltsEngine Cooling Fins See Fig Clean AIR Screen See FigTo Service PRE-CLEANER To Service CartridgeIN-LINE Fuel Filter See Fig CleaningMuffler Spark PlugsTo Remove Mower See Fig Service and AdjustmentsTo Install Mower See Fig Belt Removal To Level Mower HousingBelt Installation To Replace Mower Blade Drive Belt See FigFront Wheel TOE-IN/CAMBER To Adjust Steering Wheel AlignmentInterlocks and Relays Replacing Battery SeeTo Remove Hood and Grill Assembly See Fig To Replace Headlight BulbFinal Setting To Adjust Throttle Control Cable See FigTo Adjust Carburetor See Fig Preliminary SettingEngine OIL StorageOther Fuel SystemTroubleshooting Points OFF Tractor - Model Number PO14542B Schematic2122 Electrical175141 175158175566 Chassis and Enclosures 155924X012 117 110 111 115 Drive173898 174973154407 Bellcrank Clutch Steering Assembly KEY Part NO. NO. Description Engine 17060620 170551148315 Seat Assembly Wheels & Tires DecalsMower Lift Nut Lock w/Wsh 1/2-13 Unc Mower Deck 174284 171977165898 Service Notes Limited Warranty C U M SEH Only Ride UP and Down Hill Suggested Guide for Sighting Slopes for Safe Operation

176038 specifications

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