Mercury 850 Wiring Harness

You will need to save a 12 piece of wire on the quick disconnect plug and crimp and solder the butt joints to splice the new wire on.

Mercury 850 wiring harness. Then it quit and they had to be towed in. Mercury mariner outboard wiring harness fits engines using 1979 2006 8 pin cannon plug harness harness enters through cowling front 20. For newer tachs which use a signal from the alternator the wire would be connected to one of the two yellow stator wires hooked to the rectifier. Buy a genuine mercury quicksilver or aftermarket part.

Fits 1977 1981 20 hp 1976 1979 50 hp 1978 1979 80 hp 1976 1977 85 hp engines. The external harnesses are about 20 feet long. Fits all 4 cyl. Please check oems below for correct application of the item.

That is the harness that goes from the engine to the control box by the steering wheel. Use the shrink tube to insulate. Most models also have black white only. Goes to motor battery ignition switch.

Mercury 850 wiring diagram looks like your motor is a 1973. The mercury outboard boat harness external is at bottom of this chart. This one is slightly different because it has been in use and running flawlessly. This mercury internal engine harness 4 cyl will fit all 85 hp 1976 1977 model 850 wsm 414 3369.

The linked images are printable but may print across more than 1 page in order to be legible. Rebuild wiring harness mercury 850 you may easily build a new motor wiring harness from wire butt joints shrink tube and ring terminals. Harness exists through the side of the cowling. Mercury marine model 850 85 hp4 cyl starter motor and wiring harness parts.

The brown wire is the tach wire and for use with old merc tachs the wire was connected to the switchbox.