Yamaha F2 5 Service Manual

69M3E111-16
1
2
3
4
5
6
7
8
9
Checking the engine oil
1. Check the oil level through the oil level
window 1
.
NOTE:
If the engine oil is above the maximum level
a
, drain sufficient oil until the level is
between a
 and b
.
If the engine oil is below the minimum level
b
, add sufficient oil until the level is
between a
 and b
.
Checking the outboard motor 
mounting height
1. Check that the anti-cavitation plate is
between the bottom of the boat and a
maximum of 25 mm (1 in) a
 below it. If
the mounting...

GEN 
INFO
General information
1-1769M3E11
2. Check that the steering operates
smoothly.
Checking the gear shift and throttle 
operation
1. Check that the gear shift operates
smoothly when the shift lever is shifted
from neutral into forward.
2. Check that the throttle operates smoothly
when the throttle grip is turned from the
fully closed position to the fully open
position a
.
Checking the engine shut-off switch
1. Check that the engine turns off when the
engine stop switch is pushed or the
engine...

69M3E111-18
1
2
3
4
5
6
7
8
9
Test run
1. Start the engine, and then check that the
gear shift operates smoothly.
2. Check the engine idle speed after the
engine has been warmed up.
3. Operate at trolling speed.
4. Run the outboard motor for one hour at
2,000 r/min or at half throttle, then for
another hour at 3,000 r/min or at 3/4
throttle.
NOTE:
The test run is part of the break-in operation.
Break-in
During the test run, perform the break-in
operation in the following three stages. 
1. One hour a
 at...

GEN 
INFO
General information
1-1969M3E11
4. Turn the throttle stop screw 2
 in direc-
tion a
 or b
 until the specified idle speed
is obtained.
NOTE:
To increase the idle speed, turn the throttle
stop screw in direction a
.
To decrease the idle speed, turn the throttle
stop screw in direction b
.
5. After adjusting the idle speed, rev the
engine a few times and let it idle for at
least 15 seconds to check the stability of
the engine. If necessary, repeat steps 3–
5. 

69M3E11
SPEC
1
2
3
4
5
6
7
8
9
Specifications
General specifications ................................................................................... 2-1
Maintenance specifications .......................................................................... 2-3
Power unit.................................................................................................. 2-3
Electrical .................................................................................................... 2-5
Dimensions...

SPECSpecifications
2-169M3E11
General specifications2
Item UnitModel
F2.5AMH
Dimension
Overall length mm (in) 623 (24.5)
Overall width mm (in) 345 (13.6)
Overall height
(S) mm (in) 1,021 (40.2)
(L) mm (in) 1,148 (45.2)
Boat transom height
(S) mm (in) 381 (15.0)
(L) mm (in) 508 (20.0)
Weight*
(S) kg (lb) 17.0 (37.5)
(L) kg (lb) 17.5 (38.6)
Performance
Maximum output kW (hp) 
at 5,500 r/min1.8 (2.5)
Full throttle operating range r/min 5,250–5,750
Maximum fuel consumption L (US gal, 
lmp gal)/hr 
at 5,500...

69M3E112-2
1
2
3
4
5
6
7
8
9
Fuel and oil
Fuel type Regular unleaded gasoline
Fuel rating PON*
RON86
91
Fuel tank capacity L (US gal, 
lmp gal)0.9 (0.24, 0.20)
Engine oil type 4-stroke motor oil
Engine oil grade API
SAESE, SF, SG, SH, or SJ
10W-30 or 10W-40
Engine oil quantity L (US gal, 
lmp gal)0.35 (0.09, 0.08)
Gear oil type Hypoid gear oil
Gear oil grade SAE 90
Gear oil quantity cm
3 (US oz, 
lmp oz)75 (2.5, 2.6)
Bracket
Trim angle 
(at 12 degree boat transom)Degree 0, 4, 8, 12
Tilt-up angle  Degree...

SPECSpecifications
2-369M3E11
Maintenance specifications2
Power unit
Item UnitModel
F2.5AMH
Power unit
Minimum compression 
pressure*kPa 
(kgf/cm
2, psi)700 (7.0, 102)
Cylinder head
Warpage limit mm (in) 0.1 (0.004)
(lines indicate straightedge 
position)
Cylinder
Bore size mm (in) 54.000–54.015 (2.1260–2.1266)
Taper limit mm (in) 0.08 (0.0031)
Out-of-round limit mm (in) 0.05 (0.0020)
Piston
Piston diameter (D) mm (in) 53.950–53.965 (2.1240–2.1246)
Measuring point (H) mm (in) 0 (0)
Piston-to-cylinder...

69M3E112-4
1
2
3
4
5
6
7
8
9
Oil ring
Dimension B mm (in) 1.87–1.95 (0.0736–0.0768)
Dimension T mm (in) 2.10–2.40 (0.0827–0.0945)
End gap mm (in) 0.20–0.70 (0.0079–0.0276)
Side clearance mm (in) 0.06–0.16 (0.0024–0.0063)
Camshaft
Intake and 
exhaust (A)mm (in) 26.139–26.239 (1.0290–1.0330)
Intake and 
exhaust (B)mm (in) 21.950–22.050 (0.8642–0.8681)
Camshaft journal diameter mm (in) 14.965–14.990 (0.5892–0.5902)
Camshaft journal oil clearance mm (in) 0.010–0.053 (0.0004–0.0021)
Camshaft runout limit mm...

SPECSpecifications
2-569M3E11
Electrical
Connecting rod
Small end inside diameter mm (in) 12.006–12.020 (0.4727–0.4732)
Big end inside diameter mm (in) 24.000–24.015 (0.9449–0.9455)
Big end side clearance mm (in) 0.2–0.6 (0.008–0.024)
Crankpin oil clearance mm (in) 0.016–0.046 (0.0006–0.0018)
Crankshaft
Crankshaft journal diameter mm (in) 21.980–21.993 (0.8654–0.8659)
Crankpin diameter mm (in) 23.969–23.984 (0.9437–0.9443)
Crankpin width mm (in) 21.0–21.1 (0.827–0.831)
Runout limit mm (in) 0.01 (0.0004)...