Yamaha F25A Service Manual

2-10
SPEC
E
TIGHTENING TORQUES
TIGHTENING TORQUES
Part to be tightened Thread size
Tightening torque
Nm m • kg ft • lb
POWER UNIT
Power unit mounting M8 21.0 2.1 15.5
Recoil starter roller M6 8.0 0.8 5.9
Sheave drum M6 15.0 1.5 11.1
Flywheel magneto M20 157.0 16.0 115.8
Carburetor M6 8.0 0.8 5.9
Oil filter cartridge — 17.5 1.8 12.9
Oil filter cartridge bolt — 40.0 4.1 29.5
Spark plug M12 17.2 1.7 12.6
Drive pulley M35 140.0 14.3 103.3
Driven pulley M10 38.0 3.9 28.0
Cylinder head
1st
M9
22.6 2.3 16.7
2nd 46.1 4.7 34.0
Cylinder head cover
1st
M6
6.0 0.6 4.4
2nd 11.8 1.2 8.7
Rocker arm shaft M8 18.0 1.8 13.3
Tappet adjusting screw M6 13.5 1.4 10.0
Exhaust cover
1st
M6
6.0 0.6 4.4
2nd 12.0 1.2 8.9
Crankcase
1st
M6
6.0 0.6 4.4
2nd 12.0 0.6 8.9
1st
M8
15.0 1.5 11.1
2nd 30.0 3.1 22.1
Connecting rod
1st
M6
6.0 0.6 4.4
2nd 16.5 1.7 12.2
Balancer piston M20 157.0 16.0 115.8
Oil pump cover — 4.4 0.4 3.2
LOWER
Propeller M16 34.4 3.5 25.3
Lower unit mounting M10 36.8 3.8 27.1
Propeller shaft housing M8 11.1 1.1 8.1
Pinion nut M12 49.5 5.0 36.5
Water inlet M6 4.4 0.4 3.2
BRACKET
Tiller handle mounting M10 37.0 3.8 27.3
Tiller handle pivot M8 12.7 1.3 9.4
Steering bracket adjusting bolt M8 4.0 0.4 2.9
Upper rubber mount M8 23.6 2.4 17.4
Rubber mount housing M8 17.7 1.8 13.0
Upper damper M8 18.0 1.8 13.0
Lower mount housing M10 53.9 5.5 39.8
Clamp bracket - upper (manual tilt) M22 13.0 1.3 9.4

Yamaha F25A Specifications

General

Brand	Yamaha
Model	F25A
Category	Outboard Motor
Language	English