Mercury Mariner 8/9.9HP 4-Stroke Factory Service Manual, Page 61Get this manual
Stator Ohms Test (Alternator LightingCharging Coil) NOTE: Stator can be tested without removing from engine1Disconnect the both green and the greenwhite (stator leads) bullet connectors from the rectifier regulator assembly
Alternator System Test (6 Ampere Stator) CAUTION
When testing any charging system, the technician must use an amp meter capable of reading the maximum current output for the test being performed or higherFailure to use amp meter that can handle the specific current load could possibly damage the meter being usedIMPORTANT: Rectifier (optional accessory) must be functioning properly for accurate test results to be obtained1Remove RED lead from (+) terminal of rectifier2Connect RED (+) ammeter lead to rectifier (+) ter-
NOTE: On manual start models, equipped with lighting regulator or battery charging rectifier, remove both green lead bullet connectors2Using and ohm meter and perform the following test
NOTE: When measuring the resistance of 10 ohms or less using an digital ohm meter, if the correct measurement cannot be obtained, place the meter selector to lower resistance measurementLIGHTING COIL