Ryobi 767r Carburetor Adjustment, Check Fuel Mixture, Clean Air Filter, Adjust Idle Speed Screw

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MAINTENANCE AND REPAIR INSTRUCTIONS

CARBURETOR ADJUSTMENT

The idle speed of the engine is adjustable through the Air filter/Muffler cover (Fig. 36).

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 the unit not running properly. Drain and refill the tank with fresh, properly mixed fuel prior to making any adjustments. Refer to

Oil and Fuel Information Pg. 12.

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 Pg. 19.

Adjust Idle Speed Screw

WARNING: The cutting attachment may be spinning during idle speed adjustments. Wear protective clothing and observe all safety instructions to prevent serious personal injury.

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

1.Start the engine and let it run at a high idle for a minute to warm up. See Starting/Stopping Instructions, Pg. 13.

2.Release the throttle trigger and let the engine idle. If the engine stops, insert a small phillips or flat blade screwdriver into the hole in the air filter/muffler cover (Fig. 36). Turn the idle speed screw in, clockwise, 1/8 of a turn at a time (as needed) until the engine idles smoothly.

Idle Speed Screw

Fig. 36

NOTE: The SpeedSpool® cutting attachment should not rotate when the engine idles.

3.If the SpeedSpool® cutting attachment rotates when the engine idles, turn the idle speed screw 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 screw should solve most engine problems.

If not and:

•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.

WARNING: When the unit is turned off make sure the cutting attachment has stopped before the unit is set down to prevent serious personal injury.

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Contents OPERATOR’S Manual Introduction Table of ContentsSpark Arrestor California Emission RegulationsRules for Safe Operation Symbol MeaningWhile Operating Symbol Meaning Safety Alert Symbol Safety and International SymbolsFor Service INFORMATION, Call Keep Bystanders Away Primer BulbSharp Blade Do not USE Blades Indicates OIL HOT Surface WarningChoke Control Full Choke position Partial Choke positionKnow Your Unit Application Shaft Housing Throttle Control Handle HardwareInstalling and Adjusting the D-HANDLE Model 767r Assembly InstructionsWing Nut Bolt Washer Model 767rHandle Screws Top Clamp Middle Clamp Bottom Clamp Installing and Adjusting the J-HANDLE Model 775rModel 775r DecalShaft Housing Cutting Installing the Cutting Attachment ShieldShield Mount Cutting Attachment Shield Recessed HolesUsing Fuel Additives Using Blended FuelsOIL and Fuel Information OIL and Fuel Mixing InstructionsPartial Choke Position B Full Choke Run Position a STARTING/STOPPING InstructionsChoke Lever Primer Bulb Starter Rope Throttle ControlOperating Instructions Installing the Cutting Attachment or Add-OnsOperating the CLICK-LINK System Model 775rModel 767r Model 775r Holding the Trimmer Adjusting Trimming Line LengthMaintenance and Repair Instructions Winding the Inner Reel With New Line Line Installation for the SpeedspoolCleaning the SpeedSpool Installing a Prewound Inner reelReleasing the Inner Reel Bump Knob Foam Seal Spring Inner ReelRemoving the Air Filter/Muffler Cover AIR Filter MaintenanceShaft Plunger Choke Lever Partial Choke Position B ScrewsCleaning the Air Filter Reinstalling the Air filter/Muffler CoverAir Filter Clean Air Filter Carburetor AdjustmentAdjust Idle Speed Screw Check Fuel MixtureReplacing the Spark Plug ACCESSORIES/REPLACEMENT Parts110-120 in.lb .3-13.5 Nm 020Cleaning Cleaning and StorageStorage Long Term StorageProblem Cause Action TroubleshootingSpecifications EngineDrive Shaft & String Head Page Owners Warranty Responsibilities Ryobi Canada INC Ryobi Outdoor Products
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