For Mercury Marine Models:
20hp Engine 1984-1994

OEM Part Number Cross Reference 89-817109A1, 89-817109A2, 89-817109A3, 18-5818 Rated Voltage 12V DC Terminal Layout 4-stud configuration, 1/4" threaded stud terminals Housing Material Corrosion-resistant zinc die-cast with powder coating Ingress Protection Rating IP67 waterproof, saltwater resistant Operating Temperature Range -40°F to 185°F (-40°C to 85°C) Coil Resistance 12Ω ± 10% Peak Current Handling Capacity 300A for 5 seconds, 100A continuous load Mounting Hole Center Spacing 2.5 inches (63.5mm) Warranty Period 12 months from date of purchase