User manual CHICAGO TIMING LIGHT

[. . . ] Timing LighT 40963 SeT up and OperaTing inSTrucTiOnS Visit our website at: http://www. harborfreight. com read this material before using this product. Failure to do so can result in serious injury. SaVe ThiS manuaL. Copyright© 2007 by Harbor Freight Tools®. No portion of this manual or any artwork contained herein may be reproduced in any shape or form without the express written consent of Harbor Freight Tools. [. . . ] Timing is advanced when the spark occurs before the piston reaches the top of a cylinder. Timing is retarded when the spark occurs after the piston has started down in the cylinder. Timing is changed by adjusting the ignition distributor. To set timing, the engine manufacturer provides "timing marks" on engine's vibration damper. Read the vehicle's manual or contact the manufacturer for the location of timing marks on the engine. Also, refer to the vehicle service manual or contact the manufacturer for the timing specifications for the particular engine. When to check timing The instant that the spark plug fires is determined by the opening of the distributor ignition breaker points and will change any time the point gap or dwell angle is changed. Normal wear on the breaker point rubbing block will change the dwell and effect the timing. Most late model vehicles are equipped with "breakerless electronic ignition systems" and will not allow a change in timing, because there are no breaker points. The Timing Light can still be used to note changes in the timing caused by problems in the ignition system or for resetting the timing when components are changed (i. e. removed and/or replaced). SKU 40963 For technical questions, please call 1-800-444-3353. Page 7 OperaTing inSTrucTiOnS read the enTire impOrTanT SaFeTY inFOrmaTiOn section at the beginning of this manual including all text under subheadings therein before set up or use of this product. note: These general instructions will not apply to all engine designs and/or vehicles. Consult engine manufacturer's service instructions which supersede these instructions. Locate the engine's timing mark by referring to the vehicle's engine manual or contacting the manufacturer. Refer to the vehicle's manual or contact the manufacturer for the timing specifications of the engine being tested. Start the engine and run for 5-15 minutes until normal operating temperature is reached. Turn the timing advance knob on the back of the timing light to 0°. If the vehicle specifications and instructions require it, locate the vacuum line that attaches to the ignition distributor vacuum advance and disconnect the line and plug the end of it. A golf tee or small pencil may be used to plug the line. 8. Timing Light hook up Spark plug clamp #1 Spark plug 6. 2. 3. 5. Connect the timing light to the 12 V Battery, and connect the Spark Plug Clamp to the Spark Plug Wire as shown above. The spark plug clamp must be connected with the arrow on the clamp pointing towards the spark plug. Start the engine and operate it at idle speed. [. . . ] No flash but Make sure arrow on clamp points to #1 double check plug. Connect to other plugs or spark plug wires. Light flashes Timing Light Spark Plug Clamp wire Route Spark Plug Clamp wire away from intermittently lying on, or near to, the other spark plug the other spark plug wires. 1. Switch in "OFF" position. [. . . ]