Mercury G2MZ-11002-BJ Starter Motor Assembly

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It should be removed from the vehicle and taken to an auto-electrician for testing.

Remove the MAF sensor, PCV pipe, and the upper bolts.

Remove and check the starter/solenoid assembly on the bench. The solenoid is likely defective. In rare cases, the engine may be seized, so try to rotate the crankshaft pulley before proceeding. With the starter/solenoid assembly mounted in a vise, connect jumper cables from the battery to the starter and apply battery voltage to the solenoid S terminal for 10 seconds or less. Observe the solenoid plunger, shill lever, and overrunning clutch. If the pinion drive extends but does not rotate, the starter motor is defective. If there is no movement but the solenoid clicks, either the solenoid or the starter motor is defective. If the solenoid plunger extends and rotates the pinion drive, the starter/solenoid assembly is functioning properly.

No, it's not necessary, but detaching the center bearing support bracket will provide enough room to remove the starter.

Check for battery voltage to the solenoid to determine if it is receiving the correct voltage signal from the ignition switch. Connect a test light or voltmeter to the starter solenoid switched terminal (the small wire) while an assistant turns the ignition switch to the start position. If voltage is not available, check all the fuses and relays in series with the starting system. If voltage is available but the starter motor does not operate, remove the starter from the engine compartment and bench test it.

Disconnect both wiring harnesses from the starter and move them to the side, then disconnect the ground wire and move it to the side.