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5 5-5 3. With the throttle lever in the idle position and the emergency stop knob in the down (STOP) posi- tion, the meter must read resistance (closed). If the meter reads no resistance (open), replace the switch. 4. Depress the throttle lever with the emergency stop knob in the up (RUN) position. The meter must read no resistance (open). If the meter reads resis- tance (closed), replace the switch. 5. With the throttle lever depressed and the emer- gency stop knob in the down (STOP) position, the meter must read resistance (closed). If the meter reads no resistance (open), replace the switch. Ignition System (Twin Carburetor F/C Models) TESTING NOTE: There must be 0.75-1.5 mm (0.030-0.060 Main Wiring and Safety Switches 1. Check the wire connections at the ignition key switch and at the emergency stop switch. This con- nector is located on the front side of the steering post. If any of the connections appear dirty or cor- roded, clean with fine sandpaper and compressed air; then connect all wires and squeeze connec- tions with a pliers for added tightness. 2. Disconnect the main wiring harness connector coming from the engine. Using an ohmmeter, con- nect one lead to the black wire in the connector of the main harness. Connect the remaining ohmme- ter lead to the brown wire in the connector of the main harness. 3. With all switches in the RUN position, the meter must read resistance (closed). If the meter reads no resistance (open), proceed to testing Emergency Stop/Throttle Switch, Carburetor Safety Switches, and Ignition Key Switch. Emergency Stop/Throttle Switch 1. If the meter read no resistance (open) in the previ- ous test, locate the wiring harness coming from the emergency stop/throttle switch assembly. 2. Disconnect the three-wire connector. Using an ohmmeter, connect one meter lead to the black wire and the other meter lead to the black/red wire in the connector. 3. With the emergency stop knob, located on top of the throttle control, in the ON (pulled up) position and the throttle lever compressed, the meter must read resistance (closed). 4. If the meter reads no resistance (open) and the lever/control housing free-play is correct, replace the throttle switch. 5. If the meter reads resistance (closed) but the engine will not start, with the ohmmeter leads still connected, alternately release and compress the throttle lever; then move the emergency stop knob down and up. 6. The meter must read no resistance (open) when the throttle lever is released and the emergency stop knob is in either the UP or the DOWN position. 7. If the meter reads resistance (closed), replace the throttle switch. 8. Connect one meter lead to the black/red wire and the other meter lead to the black/white wire. 9. With the throttle lever released (idle position) and the emergency stop knob in the DOWN position, the meter must read no resistance (open). 10. If above tests were good, proceed to testing Carbu- retor Safety Switches and Ignition Key Switch. Carburetor Safety Switches 1. If the meter read no resistance (open) in the previ- ous test, disconnect the carburetor safety switches one at time and test for a closed circuit. 2. Attach the two ohmmeter leads to the two leads coming from each carburetor switch. The meter must read resistance (closed). 3. If the meter reads no resistance (open), the switch must either be adjusted or replaced (see Synchro- nizing Carburetor Safety Switches in this sub-sec- tion). If the meter reads resistance (closed), proceed to testing Ignition Key Switch. Ignition Key Switch 1. If the meter read resistance (closed) in the previ- ous test, disconnect the ignition key switch con- nectors and connect the ohmmeter leads to each of the leads from the switch. 2. With the key switch in the OFF position, the meter must read resistance (closed). If the meter reads no resistance (open), replace the switch. |