1987-1993 Mercury Mariner Outboards 70/75/80/90/100/115HP 3 and 4-cylinder Factory Service Manual, Page 22Get this manual
Ignition System Test Chart IMPORTANT: BEFORE attempting the ignition system checks, following, thoroughly read the preceding pages of these instructions to become familiar with the proper Automatic Distributorless Ignition (ADI) test sequence and procedures (particularly any "Safety Warnings" and "Cautions")ALL tests are performed with lead wires connected terminals exposedSWITCH BOX MUST BE GROUNDED (CASE TO ENGINE BLOCK) FOR ALL TESTS IF NOT, SWITCH BOXES MAY BE DAMAGED
3 Cylinder Stators 398-9710A131428 and all 398-8778A Stators Cylinder Stators 398-9710A1531 and all 398-8778A Stators
ADI Test Test Seq1-A Coil Primary SwBox 2-A Stop Circuit 3-A Stator 4-A Low Speed 3-A Stator 4-A High Speed 5-A Sw Box SwBias Selector SwPosition 400 VDC 400 VDC 400 VDC 400 VDC 20 VDC or 40 VDC DVA Leads Red Coil (+) Terminal BlackYellow (3) SwBox Terminal Blue SwBox Terminal Red SwBox Terminal Ground Black Coil () Terminal Ground Ground Ground WhiteBlack SwBox Terminal Voltage Reading (1) 300-1000 RPM 150-250 200-360 200-300 20-90 2-10 Voltage Reading 1000-4000 RPM 180-280 200-360 200-330 130-300 10-30