Shindaiwa X7502864301, DH254 manual Spark Arrester Screen Maintenance, Carburetor Adjustment

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Spark Arrester Screen Maintenance

If the engine becomes sluggish and low on power, check and clean the spark ar- rester screen.

WARNING!

Never operate the unit with a damaged or missing muffler or spark arrester! Operating with a missing or damaged spark arrester is a fire hazard and could also dam- age your hearing.

1. With a 4 mm hex wrench remove the 3 engine cover screws and the engine cover. See Figure 26.

2.With a 4 mm hex wrench remove the 3 muffler bolts and the muffler. See Figure 26.

3.With a small flat bladed screwdriver remove the 2 screws holding the spark arrester screen and cover to the muffler. See Figure 26.

4.Remove the screen and clean it with a stiff bristle brush.

5.Inspect the cylinder exhaust port for any carbon buildup.

IMPORTANT!

If you note excessive carbon buildup, consult with an authorized Shindaiwa servicing dealer.

6.Reassemble the spark arrester, muf- fler and engine cover in the reverse order of disassembly.

Engine Cover

 

Screws

 

 

Cover

 

Muffler

 

Gasket

 

Muffler

 

Muffler

 

Bolts

 

Spark Arrester

 

Screen

 

Spark Arrester

 

Cover

Figure 26

Cover

Screws

Carburetor Adjustment

Engine Break-In

New engines must be operated a minimum duration of two tanks of fuel break-in before carburetor adjustments can be made. During the break-in period your engine performance will increase and exhaust emissions will stabilize. Idle speed can be adjusted as required.

High Altitude Operation

This engine has been factory adjusted to maintain satisfactory starting, emission, and durability performance up to 1,100 feet above sea level (ASL) (96.0 kPa). To maintain proper engine operation and emission compliance above 1,100 feet ASL the carburetor may need to be adjusted by an authorized Shindaiwa service dealer.

IMPORTANT!

If the engine is adjusted for operation above 1,100 feet ASL, the carburetor must be re-adjusted when operating the engine below 1,100 feet ASL, otherwise severe engine damage may result.

NOTE:

Every unit is run at the factory and the carburetor is set in compliance with emission regulations. Carburetor adjustments, other than idle speed, must be performed by an authorized Shindaiwa dealer.

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Image 17 Contents
DH254 Hedge Trimmer Introduction ContentsWork Safely General Safety InstructionsStay Alert Minimize the Risk of FireOperating Precautions Specifications Safety Equipment and LabelsPrior to use Emission Control Exhaust & EvaporativeUnit Description Blade Stiffener Removal AssemblyMixing Fuel Install Blade StiffenerFilling the Fuel Tank Handling FuelAfter use Minimize the Risk of FireRecoil starter can be easily damaged by abuse Starting ProcedureCranking the Engine Starting a Flooded Engine When the motor startsStopping the Engine If the Engine Does Not StartAir Filter Maintenance and AdjustmentsDaily Maintenance/Inspection More frequently in dusty conditions Hour MaintenanceThrottle Cable Free Play Every 10 to 15 hours of operation 10/15-Hour MaintenanceGearcase Lubrication Hour or Annual MaintenanceBlades Every 20 HoursValve Adjustment Carburetor Adjustment Spark Arrester Screen MaintenanceLong Term Storage Idle Speed AdjustmentPossible Cause Troubleshooting GuideIs the engine overheating? Symptom Possible Cause Remedy Exceptions Purchased Repair Parts and Accessories 99922201033 Page Page Page Parts/Serial Number Servicing Information