Mtl4186 digital advance timing light5/2/2024 ![]() This allows the operator to view and set the optimal timing of the ignition spark in relation to piston position. ![]() What is a Digital Timing Light?Ī digital timing light is a tool used to visually inspect ignition timing by synchronizing a strobe light with the firing of the number one cylinder. If you have any doubts about using the digital timing light, Check this YouTube video for visual process as a further reference. Consult an authorized mechanic if the timing is off by more than 3-4 degrees after attempting adjustment.Keep the timing light aimed perpendicular to the pulley for precise alignment of the marks.Cold timing settings will be inaccurate once at operating temperature. A weak battery can produce inconsistent flashing. Allow plenty of charging time for cordless battery powered timing lights before use.Repeat steps 4-6 until the marks are precisely aligned to the service manual specs.After each adjustment, tighten the clamp bolt and recheck with the timing light. ![]() Make small adjustments of no more than 2 degrees at a time.Rotate counterclockwise to advance, clockwise to retard. To advance or retard the timing, loosen the distributor clamp bolt and rotate the distributor.If the marks are not correctly aligned, timing adjustment is required.The proper alignment will be specified in the vehicle service manual.With the light flashing, observe the relationship of the timing marks.The flashing will “freeze” the timing marks for viewing.This will cause the light to flash in sync with the number one cylinder firing. With the light aimed at the pulley, pull the trigger on the timing light.Hold the light about 6 inches away from the pulley for best visibility.With the engine running at the specified rpm, aim the timing light at the crankshaft pulley timing marks.Set the engine speed to the rpm specified by the manufacturer, usually around 1500 rpm.This allows the ignition timing to advance properly. Start the engine and allow it to reach full operating temperature.The timing pointer is on the timing cover with a scale of degrees.Use chalk or white paint to make the marks more visible if needed. ![]()
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