Mercury E4ZZ-12127-C Distributor Assembly

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Install the hold-down clamp, distributor cap, and module electrical connector. Reattach the spark plug wires and connect the battery cable.

After installing the distributor, you should check and adjust the ignition timing if necessary, and tighten the distributor hold-down bolt securely.

Start by unplugging the primary lead from the coil and the electrical connector for the module. Then, remove the distributor cap and turn the engine until the rotor is pointing towards the number one spark plug terminal. Make marks on the distributor base and engine block to ensure proper installation. Remove the distributor hold-down bolt and clamp, and carefully pull the distributor straight up.

Unplug the primary lead from the coil and the electrical connector for the module. Follow the wires as they exit the distributor to find the connector. Note the raised "1" on the distributor cap. This marks the location for the number one cylinder spark plug wire terminal. Remove the distributor cap and turn the engine over until the rotor is pointing toward the number one spark plug terminal. Make a mark on the edge of the distributor base directly below the rotor tip and inline with it. If the rotor on your engine has more than one tip, use the center one for reference. Also, mark the distributor base and the engine block to ensure that the distributor is installed correctly. Remove the distributor holddown bolt and clamp, then pull the distributor straight up to remove it. Be careful not to disturb the intermediate driveshaft. Caution: DO NOT turn the engine while the distributor is removed, or the alignment marks will be useless. Insert the distributor into the engine in exactly the same relationship to the block that it was in when removed. To mesh the helical gears on the camshaft and the distributor, it may be necessary to turn the rotor slightly. If the distributor doesn't seat completely, the hex shaped recess in the lower end of the distributor shaft is not mating properly with the oil pump shaft. Recheck the alignment marks between the distributor base and the block to verify that the distributor is in the same position it was in before removal. Also check the rotor to see if it's aligned with the mark you made on the edge of the distributor base. If the crankshaft has been moved while the distributor is out, locate Top Dead Center (TDC) for the number one piston and position the distributor and rotor accordingly. Place the holddown clamp in position and loosely install the bolt. Install the distributor cap and tighten the cap screws securely. Plug in the module electrical connector. Reattach the spark plug wires to the plugs (if removed). Connect the cable to the negative terminal of the battery. Check the ignition timing and tighten the distributor hold-down bolt securely.

Start by unplugging the primary lead from the coil and the electrical connector for the module. Then, remove the distributor cap and turn the engine until the rotor is pointing towards the number one spark plug terminal. Make marks on the distributor base and engine block to ensure proper installation. Remove the distributor hold-down bolt and clamp, and carefully pull the distributor straight up.

Finally, check and adjust the ignition timing if needed, and tighten the distributor hold-down bolt securely.

Check the ignition timing and tighten the distributor hold-down bolt securely.