Stihl RZ 900 Series Instruction Manual - Page 34

Containing Spilled Fluids and Proper Disposal of Waste 31 Make sure that fluids are contained when performing inspection, maintenance, testing, adjustment, and repair of the unit. Be prepared to collect the fluid with suitable leakproof containers before opening or disassembling any component containing fluids. Do not pour waste onto the ground, down a drain, or into any source of water. Improper disposal of waste can threaten the environment. Dispose of all fluids according to local regulations and mandates. Electronic Fuel Injection (EFI) System EFI Models EFI is an electronically-controlled fuel management system which is monitored by an Electronic Control Unit (ECU). A Malfunction Indicator Lamp (M.I.L.) will illuminate if problems or faults are detected. Servicing by an authorized dealer is necessary. CAUTION Do not disconnect or reconnect ECU wiring harness connector or any individual components with the ignition switch in the "ON" position. This can send a damaging voltage spike through the ECU. Unplug harness from ECU before performing any welding on equipment. Servicing the Exhaust System Inspect the muffler for cracks, corrosion, or other damage. Remove the spark arrester, if equipped, and inspect for damage or carbon blockage. If replacement parts are required, make sure to use only original equipment replacement parts. WARNING Replacement parts must be of the same design and installed in the same position as the original parts. Other parts could result in damage or an injury. 2. Remove the tailpipe extension. You may need to use pliers to remove the tailpipe extension if it is stuck due to corrosion. 3. Slide the screen (D) out of the tailpipe (E) and shake the screen to remove the built up soot and carbon. The amount of carbon collected will vary depending on the fuel used, air quality, engine age, and condition. (A soft non-metallic brush may be required to fully clean the screen). 4. Carefully inspect the screen for any tears, rips or any other damage which will prevent the screen from operating properly. Replace screen if damaged. 5. Slide the screen into the tailpipe of the muffler until the retaining lip (F) is sitting against the tip of the tailpipe. 6. Slide the tailpipe extension over the tailpipe of the muffler. The extension is designed to fit tightly and you may need to twist it to get it to slide on. 7. Slide the retaining ring over the tailpipe extension until it circles the expanded section of the extension where the muffler tailpipe and tailpipe extension overlap. Torque set screw to 38 in-lbs (4,3 Nm). Replacing the Spark Arrester - Briggs & Stratton Models 1. Remove the screw (A, Figure 32) that secures the spark arrester (B) to the muffler tailpipe (C). 32 CAUTION Wait until the muffler is cool before working around or near the muffler. Replacing the Spark Arrester - Kawasaki Models 1. Loosen the set screw (A, Figure 31) on the retaining ring (B) and slide off over the tip of the tailpipe extension (C). 2. Remove the spark arrester. You may need to use pliers to remove the spark arrester if it is stuck due to corrosion. 34 stihlusa.com