Yamaha F2 5 Service Manual

							69M3E112-6
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Dimensions
Exterior
S69M2010
140 (5.5) 205 (8.1)
135 (5.3) 139 (5.5)
366 (14.4)S: 636 (25.0)
L: 761 (30.0)
309 (12.2)
93 (3.7)
57 (2.2)315 (12.4)
S: 645 (25.4)
L: 772 (30.4)
S: 432 (17.0)
L: 559 (22.0)406 (16.0)
376 (14.8)
264 (10.4)
32 (1.3)
15 (0.6) 103 (4.1)
57 (2.2)
167 (6.6)
12˚
80˚
S: 642 (25.3)
L: 746 (29.4)
215 (8.5)
470 (18.5)
mm (in)
Maintenance specifications 
						

							SPECSpecifications
2-769M3E11
Clamp bracket
S69M2020
69 (2.7) 69 (2.7)
56 (2.2) 56 (2.2)
40 (0.2)
143.7 (5.7)
21.8 (0.9)
58 (2.3)mm (in) 
						

							69M3E112-8
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Tightening torques2
Specified torques
Part to be tightened Thread sizeTightening torques
N·mkgf·mft·lb
Power unit
Anode screw M5 2.0 0.2 1.5
Choke knob nut—3.5 0.4 2.6
Connecting rod cap1st 
M65.0 0.5 3.7
2nd 9.0 0.9 6.6
Crankcase bolt1st
M65.0 0.5 3.7
2nd 11 1.1 8.1
Cylinder head bolt1st
M814 1.4 10.3
2nd 30 3.0 22.1
Cylinder head cover bolt1st
M65.0 0.5 3.7
2nd 12 1.2 8.9
Drive shaft oil seal housing bolt M8 18 1.8 13
Exhaust probe bolt M8 20 2.0 14.8
Flywheel magnet nut—44 4.4 32.4
Fuel cock lever screw M5 0.7 0.1 0.5
Rocker arm locknut M6 10 1.0 7.4
Rocker arm stud bolt M6 10 1.0 7.4
Engine oil drain bolt M8 18 1.8 13.3
Power unit bolt M6 11 1.1 8.1
Spark plug—25 2.5 18.4
Oil splasher gear bolt M6 13 1.3 9.6
Thermostat cover bolt M6 8.0 0.8 5.9
Throttle cable lock screw—0.4 0.04 0.3
Top cowling lock lever screw M3 0.4 0.04 0.3
Drive unit
Gear oil screw—8.5 0.9 6.3
Idle silencer screw M6 2.5 0.3 1.8
Shift rod arm bolt M5 5.0 0.5 3.7
Shift rod connecting bolt M6 10 1.0 7.4
Bracket unit
Apron screw M6 2.5 0.3 1.8
Bottom cowling screw M5 2.0 0.2 1.5
Tiller handle bolt M8 26 2.6 19.2
Carrying handle screw M4 1.0 0.1 0.7
Engine shut-off switch nut—1.8 0.2 1.3
Grease nipple—3.0 0.3 2.2
Swivel bracket bolt M6 12 1.2 8.9
Throttle grip screw M5 3.5 0.4 2.6
Clamp bracket inner nut—5.0 0.5 3.7
Clamp bracket outer nut—16 1.6 11.8
Throttle grip shaft cap bolt M5 3.0 0.3 2.2
Trim rod nut—5.0 0.5 3.7
Maintenance specifications / Tightening torques 
						

							SPECSpecifications
2-969M3E11
General torques
This chart specifies tightening torques for
standard fasteners with a standard ISO
thread pitch. Tightening torque specifications
for special components or assemblies are
provided in applicable sections of this man-
ual. To avoid warpage, tighten multi-fastener
assemblies in a crisscross fashion and pro-
gressive stages until the specified torque is
reached. Unless otherwise specified, torque
specifications require clean, dry threads. 
Components should be at room temperature.
Nut (A) Bolt (B)General torque 
specifications
N·mkgf·mft·lb
8 mm M5 5 0.5 3.6
10 mm M6 8 0.8 5.8
12 mm M8 18 1.8 13 
						

							69M3E11
CHK 
ADJ
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Periodic checks and adjustments
Special service tools ..................................................................................... 3-1
Maintenance interval chart ............................................................................ 3-2
Fuel system .................................................................................................... 3-3
Checking the fuel line ................................................................................ 3-3
Checking the fuel filter ............................................................................... 3-3
Power unit ....................................................................................................... 3-3
Checking the engine oil ............................................................................. 3-3
Changing the engine oil ............................................................................. 3-4
Checking the valve clearance.................................................................... 3-4
Checking the spark plug ............................................................................ 3-5
Checking the thermostat............................................................................ 3-6
Checking the cooling water passage ......................................................... 3-7
Control system ............................................................................................... 3-7
Checking the engine idle speed ................................................................ 3-7
Checking the ignition timing....................................................................... 3-8
Checking the TCI unit air gap .................................................................... 3-9
Lower unit ....................................................................................................... 3-9
Checking the gear oil level ........................................................................ 3-9
Changing the gear oil .............................................................................. 3-10
Checking the lower unit for air leakage ................................................... 3-11
Checking the propeller............................................................................. 3-11
General .......................................................................................................... 3-11
Checking the anodes ............................................................................... 3-11
Lubricating the outboard motor................................................................ 3-12 
						

							CHK 
ADJ
Periodic checks and adjustments
3-169M3E11
Special service tools3
Digital tachometer
90890-06760
Timing light
90890-03141
Leakage tester
90890-06840 
						

							69M3E113-2
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Maintenance interval chart3
Use the following chart as a guideline for general maintenance.
Adjust the maintenance intervals according to the operating conditions of the outboard motor.
NOTE:
The engine should be flushed with fresh water after operating in salt, turbid, or muddy water.
If leaded gasoline is used regularly, check the engine valves and related parts every 100 hours of
operation in addition to the items in the maintenance interval chart.Item RemarksInitial Every
Refer to 
page
10 hours 
(Break-in)50 hours 
(3 months)100 hours 
(6 months)200 hours 
(1 year)
Fuel system
Fuel line Check 3-3
Fuel filter Check/replace 3-3
Power unit
Engine oil Change 3-4
Valve clearance Check/adjust 3-4
Spark plug Clean/adjust/replace 3-5
Thermostat Check 3-6
Outboard motor 
exteriorCheck—
Cooling water passage Clean 3-7
Control system
Carburetor Check 4-7
Engine idle speed Adjust 3-7
Ignition timing Check 3-8
TCI unit air gap Check/adjust 3-9
Lower unit
Gear oil Change 3-10
Propeller Check 3-11
General
Anodes Check/replace 3-11
Bolts and nuts Tighten—
Lubrication points Lubricate 3-12
Special service tools / Maintenance interval chart 
						

							CHK 
ADJ
Periodic checks and adjustments
3-369M3E11
Fuel system3
Checking the fuel line
1. Check the fuel tank 1
 for leaks. Replace
if necessary. Also, check the fuel hose 2
for leaks and deterioration, and the car-
buretor 3
 and fuel cock for leaks.
Replace if necessary.
Checking the fuel filter
1. Check the fuel filter for dirt or residue.
Clean with straight gasoline and replace
the filter if necessary.
Power unit3
Checking the engine oil
1. Place the outboard motor in an upright
position.
2. Check the oil level through the oil level
window 1
.
NOTE:
Change the oil if it appears milky or dirty.
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
.
S69M3040
aa
bb 
						

							69M3E113-4
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Changing the engine oil
1. Remove the oil filler cap 1
.
2. Place a drain pan under the drain hole,
and then remove the drain bolt 2
 and let
the oil drain completely.
NOTE:
Be sure to clean up any oil spills.
3. Install the drain bolt 2
, and then tighten
it to the specified torque.
4. Pour the specified amount of the recom-
mended engine oil into the oil filler hole.5. Install the oil filler cap, and then start the
engine and warm it up for 5 minutes.
6. Turn the engine off, and then check the
oil level and correct it if necessary.
Checking the valve clearance
1. Remove the engine shut-off cord from
the engine shut-off switch on the tiller
handle.
2. Remove the carrying handle 1
, fuel cock
lever 2
, bottom cowling 2 3
, spark plug
4
, fuel tank bolts 5
, and cylinder head
cover 6
.
T R..
Engine oil drain bolt 2
:
18 N·m (1.8 kgf·m, 13.3 ft·lb)
Recommended engine oil:
4-stroke motor oil
API: SE, SF, SG, SH, or SJ
SAE: 10W-30 or 10W-40
Oil quantity:
0.35 L (0.09 US gal, 0.08 Imp gal)
Fuel system / Power unit 
						

							CHK 
ADJ
Periodic checks and adjustments
3-569M3E11
3. Slowly pull the starter rope to set the pis-
ton position to TDC of the compression
stroke.
NOTE:
Make sure that the rocker arms 7
 are not
pushing the intake valve 8
 and exhaust
valve 9
.
Check the position of the piston from the
spark plug installation hole 0
.
Do not turn the flywheel magnet counter-
clockwise.
4. Check the valve clearance. Adjust if out
of specification.
NOTE:
Check the valve clearance when the engine
is cold.
Note the measurement.5. Loosen the rocker arm locknuts A
, and
then turn the rocker arm pivot B
 until the
specified valve clearance is obtained.
NOTE:
To decrease the valve clearance, turn the
rocker arm pivot in direction c
.
To increase the valve clearance, turn the
rocker arm pivot in direction d
.
6. Tighten the rocker arm locknuts to the
specified torque, and then check the
valve clearances. Adjust if necessary.
7. Install the cylinder head cover, fuel tank
bolts, spark plug, bottom cowling 2, fuel
cock lever, and carrying handle.
Checking the spark plug
1. Remove the grommet 1
.
2. Disconnect the spark plug cap from the
spark plug, and then remove the spark
plug.
Valve clearance:
Intake a
:
0.08–0.12 mm 
(0.0031–0.0047 in)
Exhaust b
:
0.08–0.12 mm 
(0.0031–0.0047 in)
T R..
Rocker arm locknut A
:
10 N·m (1.0 kgf·m, 7.4 ft·lb)