Ryobi RY903600 User Manual - Page 20

MAINTENANCE n Replace the engine maintenance cover and reinstall the screw to secure. CHANGING ENGINE LUBRICANT See Figure 14. n Loosen the screw at the top of the engine maintenance cover. Remove cover and set aside. n Remove the oil fill cap/dipstick. n Tilt the generator to the side and allow lubricant to drain from the oil fill hole into an approved container. NOTE: Drain the lubricant while the engine is still warm but not hot. Warm lubricant will drain quickly and more completely. WARNING: Do not change engine lubricant while it is hot. Accidental contact with hot engine lubricant could result in serious burns. n Return the generator to an upright position and refill with lubricant following the instructions in the Checking/ Adding Lubricant section previously in this manual. For amount of lubricant needed to refill, see Product Specifications earlier in this manual or the accompanying engine manual, if applicable. n Replace and secure the oil cap/dipstick. n Replace the engine maintenance cover and reinstall the screw to secure. NOTE: Consult hazardous waste management guidelines in your area for the proper way to dispose of used lubricant. SPARK PLUG MAINTENANCE See Figure 15. The spark plug must be properly gapped and free of deposits in order to ensure proper engine operation. To check: n Remove the spark plug cover. n Remove the spark plug cap. n Clean any dirt from around base of spark plug. n Remove spark plug using spark plug wrench (not included). n Inspect spark plug for damage, and clean with a wire brush before reinstalling. If insulator is cracked or chipped, spark plug should be replaced. For replacement spark plug, see Product Specifications earlier in this manual or the accompanying engine manual, if applicable. n Measure plug gap. The correct gap is 0.024−0.028 in. (0.60-0.70 mm). To widen gap, if necessary, carefully bend the ground (top) electrode. To lessen gap, gently tap ground electrode on a hard surface. n Seat spark plug in position; thread in by hand to prevent cross-threading. NOTICE: Be careful not to cross-thread the spark plug. Cross-­ threading will seriously damage the product. n Tighten with wrench (not included) to compress washer. If spark plug is new, use 1/2 turn to compress washer appropriate amount. If reusing old spark plug, use 1/8 to 1/4 turn for proper washer compression. NOTE: An improperly tightened spark plug will become very hot and could damage the engine. CLEANING THE EXHAUST PORT AND MUFFLER Depending on the type of fuel used, the type and amount of lubricant used, and/or your operating conditions, the exhaust port and muffler may become blocked with carbon deposits. If you notice a power loss with your gas-powered products, you may need to remove these deposits to restore performance. We highly recommend that only qualified service technicians perform this service. SPARK ARRESTOR See Figure 16. NOTICE: The spark arrestor on this product has not been evaluated by the USDA Forest Service and cannot be used on U.S. forest lands. In addition, product users must comply with Federal, State, and local fire prevention regulations. Check with appropriate authorities. Contact customer service or a qualified service center to purchase a replacement spark arrestor. The spark arrestor must be cleaned or replaced every 50 hours or yearly to ensure proper performance of your product. Spark arrestors may be in different locations depending on the model purchased. Contact customer service or a qualified service center for the location of the spark arrestor for your model. To clean the spark arrestor:  Loosen the screws on the rear panel. Remove rear panel and set aside.  Remove the screw securing the spark arrestor in place.  Remove the spark arrestor and gently clean using a wire brush.  Replace the spark arrestor and rear panel. Ensure that all screws are tightened securely. 16 - English