RedMax TR2350 Service Bulletin

RedMax TR2350 Service Bulletin Manual pdf 1 page image

1/4 PageEMISSIONS SERVICE BULLETINRef No. 12-01RIssued in: Jan. 2012To: All RedMax Distributors and DealersSubject: Emission Carburetor: Low Speed Mixture Needleand Altitude Adjustment Procedures (Fixed Main Jet)Emissions Carburetor: Walbro-Model: WYL- 221 PART # 521600901 (848E488100)PRODUCT MODEL ENGINE SERIAL NUMBERBrush-cutter:TR2350From:All units listed with above carburetor modelThe carburetors on the listed model have been factory preset to C.A.R.B. Tier III and E.P.A Phase IIemissions regulations. The Idle-speed adjustment is controlled by idle speed throttle valve screw.The Low-speed mixture needles has been preset and sealed to insure compliance with emissionregulations. The Low-speed Fuel mixture needle adjustment controls the Fuel/ Air mixture at idle andmid-range engine speeds. The wide open throttle (WOT) speed operation is controlled by Fixed Main Jet.Extended operation above 4000 ft, or after carburetor rebuild, requires readjustment of idle screw andmixture needle to insure the engine continues to comply with C.A.R.B, and E.P.A, emission regulations.1. REQUIRED TOOLSCarburetor adjustment screw driver 2.5 mm flat tip, Limiter cap removal tool, Electronic digitaltachometer with sensitivity capable to within 10 RPM increments, and One (1) Limiter cap.WARNING!!! DANGER!!!Always operate unit in a well ventilated and clear work area. Keep hands clear of moving,rotating, cutting attachment, or components during adjustment otherwise serious bodily injurymay occur.2. PRE - ADJUSTMENT CHECK LISTIMPORTANT: Before performing carburetor adjustment, the following areas must be inspectedand in good working order.● Correct spark plug set to specified gap must be used.Spark Plug: NGK-BPMR7Y Gap: 0.026 inch (0.65 mm)● Standard nylon head must be installed with 7 inches (180 mm)of line exposed on both sides.● The air filter must be clean and properly installed.● The carburetor and carburetor insulator block screws must be tight.● The fuel filter must be clean and properly installed.● The muffler spark arrestor screen and exhaust port must be clearof carbon.● The fuel must be fresh (≥ 89 Octane or higher: RON+MON/ 2) andproperly mixed at 50:1 ratio with RedMax or (ISO-L-EGD/ JASOFD) registered 2-stroke oil.0.026 in（0.65 mm）

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