Mercury 225 OptiMax Manual

OUTBOARD INSTALLATION
103
Dual Outboards
Connect a common ground cable (wire size same as engine
battery cables) between negative (–) terminals on starting
batteries.
(-)
(-)
a
a
b
b
c
d
d
15497
a - Red sleeve ‑ Positive (+)
b - Black sleeve ‑ Negative
(–)
c - Ground cable
d - Cranking battery
HOSE AND TUBING CONNECTIONS
Fuel Hose
The minimum fuel line inside diameter (I.D.) is 8 mm (5/16 in.), with
a separate fuel line/fuel tank pickup for each engine.
Fasten the remote fuel hose to the fitting with a hose clamp.
Oil Hoses
Connect the remote oil hoses to the engine hose connections.
Fasten hose connections with cable ties.
Water Pressure and Speedometer Hose or Tubing
NOTE: This applies to models without SmartCraft gauges.

Mercury 225 OptiMax Specifications

General

Engine Type	V6
Horsepower	225 HP
Fuel Induction System	2-stage Direct Fuel Injection (DFI)
Alternator Output	60 amp / 756 watt
Weight	505 lbs / 229 kg
Cylinders	6
Starting	Electric
Gear Ratio	1.75:1
Displacement	3.0L
Shaft Length	20", 25"