Installation Requirements; Boat Horsepower Rating - Yamaha F2.5 Owner's Manual

Specifications and requirements
Starting carburetion system:
Choke valve
Valve clearance IN (cold engine):
0.08–0.12 mm (0.0032–0.0047 in)
Valve clearance EX (cold engine):
0.08–0.12 mm (0.0032–0.0047 in)
Lower unit:
Gear shift positions:
F2.5MHA Forward-neutral
F4MHA Forward-neutral-reverse
F6MHA Forward-neutral-reverse
Gear ratio:
2.08(27/13)
Trim and tilt system:
Manual tilt
Propeller mark:
F2.5MHA BS
F4MHA BA
F6MHA BA
Fuel and oil:
Recommended fuel:
Regular unleaded gasoline
Min. pump octane number (PON):
86
Fuel tank capacity:
F4MHA 12 L (3.17 US gal, 2.64 Imp.gal)
F6MHA 12 L (3.17 US gal, 2.64 Imp.gal)
Fuel tank capacity (built in type):
F2.5MHA 0.9 L (0.24 US gal,
0.20 Imp.gal)
F4MHA 1.1 L (0.29 US gal, 0.24 Imp.gal)
F6MHA 1.1 L (0.29 US gal, 0.24 Imp.gal)
Recommended engine oil:
YAMALUBE 4M FC-W or 4-stroke
outboard motor oil
Recommended engine oil grade 1:
SAE 10W-30/10W-40/5W-30
API SE/SF/SG/SH/SJ/SL
18
Engine oil quantity:
F2.5MHA 0.4 L (0.42 US qt, 0.35 Imp.qt)
F4MHA 0.6 L (0.63 US qt, 0.53 Imp.qt)
F6MHA 0.6 L (0.63 US qt, 0.53 Imp.qt)
Lubrication system:
F2.5MHA Splash
F4MHA Wet sump
F6MHA Wet sump
Recommended gear oil:
Yamalube Marine Gearcase Lube or
Hypoid gear oil
Recommended gear oil grade:
SAE 90 API GL-4
Gear oil quantity:
F2.5MHA 0.075 L (0.079 US qt,
0.066 Imp.qt)
F4MHA 0.100 L (0.106 US qt,
0.088 Imp.qt)
F6MHA 0.100 L (0.106 US qt,
0.088 Imp.qt)
Tightening torque:
Spark plug:
F2.5MHA 25 Nm (2.55 kgf-m, 18.4 ft-lb)
F4MHA 13 Nm (1.33 kgf-m, 9.6 ft-lb)
F6MHA 13 Nm (1.33 kgf-m, 9.6 ft-lb)
Engine oil drain bolt:
18 Nm (1.84 kgf-m, 13.3 ft-lb)
EMU33554

Installation requirements

EMU33564

Boat horsepower rating

EWM01560
WARNING
Overpowering a boat can cause severe in-
stability.
Before installing the outboard motor(s), con-
firm that the total horsepower of your out-
board motor(s) does not exceed the boats
maximum horsepower rating. See the boat's
capacity plate or contact the manufacturer.