1997+ Mercury 35/40HP 2 Cylinder Outboards Service Manual PN 90-826148R2, Page 86Get this manual
VOLTAGE REGULATORRECTIFIER TESTModels with (SN-0G590000Above) NOTE: Voltage regulatorrectifier specifications are given for informational purposes only, use the appropriate troubleshooting techniques previously mentioned to find the faulty component in the charging system
SCR TEST: 1Set Ohm meter to 1k scale2Connect Red (+) meter lead to regulator case3Connect Black () meter lead to one YELLOW regulator LeadTestConnect Black () meter lead to the other YELLOW leadTEST RESULTS (BOTH TEST): 15,000- OHMS (15k -) TACHOMETER CIRCUIT TEST: 1Set Ohm meter to 1k scale2Connect Red (+) meter lead to GREY regulator lead3Connect Black () meter lead to regulator caseTEST RESULTS: 10,00050,000 OHMS (10k50k)