User manual MTD LT31

[. . . ] Operator’s Manual LT31 2-Cycle Petrol Trimmer IMPORTANT: Read safety rules and instructions carefully before operating equipment. MTD SOUTHWEST 550 N. 54TH STREET, CHANDLER, ARIZONA 85226-2434 PRINTED IN U. S. A. 769-00302 REV1 (7/02) TABLE OF CONTENTS Content Page Important Safe Operation Practices. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Know Your Trimmer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [. . . ] Excessive line length will make the unit overheat. This may lead to serious personal injury or damage to the unit. Some line breakage will occur from: • • • • Entanglement with foreign matter Normal line fatigue Attempting to cut thick, stalky weeds Forcing the line into objects like walls or fence posts TIPS FOR BEST TRIMMING RESULTS • • Keep the cutting head parallel to the ground. Allow the tip of the line to do the cutting, especially along walls. Cutting with more than the tip will reduce cutting efficiency and may overload the engine. Cut grass over 200 mm (8 inches) by working from top to bottom in small increments to avoid premature line wear or engine drag. Cut from left to right whenever possible. Cutting to the right improves the unit's cutting efficiency. Clippings are thrown away from the operator. Slowly move the trimmer into and out of the cutting area at the desired height. Move either in a forwardbackward or side-to-side motion. Cutting shorter lengths produces the best results. The life of your cutting line is dependent upon: • Following the previous trimming techniques • • What vegetation is being cut Where vegetation is cut • • • FIGURE 8 ADJUSTING TRIMMING LINE LENGTH The Bump Head™ cutting head allows you to release trimming line without stopping the engine. To release more line, lightly tap the cutting head on the ground while operating the trimmer at high speed, Figure 9. NOTE: Always keep the trimming line fully extended. Line release becomes more difficult as cutting line becomes shorter. • • FIGURE 10 FIGURE 9 For example, the line will wear faster when trimming against a foundation wall as opposed to trimming around a tree. Each time the head is bumped, about 25. 4 mm (1 inch) of trimming line releases. A blade in the cutting head guard will cut the line to the proper length if excess line is released. DECORATIVE TRIMMING Decorative trimming is accomplished by removing all vegetation around trees, posts, fences, etc. Rotate the whole unit so that the cutting head is at a 30° angle to the ground, Figure 10. 10 SECTION 5: MAINTAINING YOUR TRIMMER NOTE: Some maintenance procedures may require special tools or skills. If you are unsure about these procedures take your unit to an authorized service dealer. NOTE: Maintenance, Replacement, or Repair of the emission control devices and system may be performed by any non-road engine repair establishment, individual or authorized service dealer. In order to assure peak performance of your engine, inspection of the engine exhaust port may be necessary after 50 hours of operation. If you notice lost RPM, poor performance or general lack of acceleration, this service may be required. [. . . ] . Drain gas tank / Add fresh fuel mixture Improper carburetor adjustment . . Adjust carburetor ENGINE WILL NOT ACCELERATE CAUSE ACTION Old or improperly mixed fuel . . Drain gas tank / Add fresh fuel mixture Improper carburetor adjustment . . Take to an authorized service dealer for carburetor adjustment ENGINE LACKS POWER OR STALLS WHEN UNDER LOAD CAUSE ACTION Old or improperly mixed fuel . [. . . ]