(27 N.m).ġ0. Reconnect the two wires to the shift interrupt switch. Torque distributor hold down bolt to 20 lb. Repeat Step 7 until timing is correct.ĩ. Stop the engine. Refer to “Specifications”.ħ. Adjust timing by loosening distributor clamp and rotating distributor body as required until timing mark on damper or pulley lines up with the mark on tab specified in “Specifications.” Tighten clamp and recheck location of timing mark.Ĩ. Aim timing light at timing tab and recheck location of timing mark. IMPORTANT: Do not fail to reconnect these two wires to the shift interrupt switch when timing procedures are complete.ĥ. Start engine and run at normal idle speed.Ħ. Aim timing light at timing tab, located on the timing gear cover and crankshaft torsional damper. (150 mm) section of 16 gauge wire with two male bullet terminal ends connected.Ĥ. Bypass the shift interrupt switch, as follows:Ī Disconnect wires at shift interrupt switch.ī Temporarily join the engine harness wires together. Use Quicksilver 91-818812A1, or fabricate a jumper wire using a 6 in. Chalk or white paint on timing mark on damper may help visibility.ģ. Install a jumper wire between the two WHITE leads on the distributor. NOTE: Before starting engine make sure the timing tab and mark on damper are clean. Refer to Specifications – “Engine Rotation and Firing Order,” for cylinder numbering and location. Connect power supply leads on light to 12 volt battery. IMPORTANT: Failure to follow these timing procedure instructions will result in improper timing causing performance problems and possible severe damage to marine engines.ġ. Connect timing light (91-99379 or similar) to No. In a points-type ignition, this can save the points from burning or pitting by giving the capability to accurately set the point gap.Shop the PPT Online Store to Buy Mercruiser Engines & Longblocks……Read More The best units will also have a dwell meter to check the amount of time the coil is being charged. Some of these lights will have two trigger buttons to advance the timing as opposed to a knob. It will have a switch to toggle from RPM to timing. The better timing lights will also have a tachometer incorporated in the unit. A look at the knob will indicate the amount of advance at that RPM. A turn of the knob will bring the mark back to the "0" mark on the pointer. As the RPM is increased to 2,000, the timing mark will move counterclockwise as the ignition advances the spark. Once the mark has been adjusted to the "0" mark on the pointer, the knob will indicate the amount of degrees that the timing is advanced or retarded at that point. When the engine is at an idle, the knob should be adjusted so the timing mark on the crankshaft pulley is on the "0" mark on the timing pointer. Another good feature is a knob that allows the timing light to advance the light to show the timing at different RPMs. The standard digital inductive timing light will be capable of timing both a two-cycle as well as a four-cycle engine. It will show the timing mark at an idle anything above an idle would have to be interpolated. The standard inductive timing light is a nonadjustable xenon tube light.
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