Yamaha F20A Service Manual

2-7
SPEC
E
MAINTENANCE SPECIFICATIONS
IGNITION CONTROL SYSTEM
Oil pressure switch kPa (kg/cm
2
, psi) 15.5 (0.16, 2.25)
Power bobbin (Y/B – Y/B)
loaded
@ cranking 1* V 7
@1,500 r/min V 30
@3,500 r/min V 80
open circuit
@ cranking 2* V 10
@1,500 r/min V 40
@3,500 r/min V 80
Electrothermal valve coil
resistance (Y/B – Y/B)
Ω 6.7 ~ 7.1
Engine temperature sensor
resistance
@ 5 ˚C (41 ˚F) kΩ 2.5
@ 20 ˚C (68 ˚F) kΩ 1.25
@ 70 ˚C (158 ˚F) kΩ 0.176
Engine speed limiter
Retard timing r/min 6,200 ± 80
Ignition off r/min 6,300 ± 80
Reset r/min 6,000 ± 80
Overheat speed control r/min 2,000 ~ 3,000
STARTING SYSTEM
Fuse A 20
STARTER MOTOR
Type Bendix
Rating Second 30
Output kW 1.1
Brush length limit mm (in) 6.4 (0.25)
Commutator undercut mm (in) 0.8 (0.03)
CHARGING SYSTEM
Lighting coil output peak voltage
(Y – Y)
loaded
@ cranking 1* V 10
@1,500 r/min V 25
@3,500 r/min V 65
open circuit
@ cranking 2* V 10
@1,500 r/min V 25
@3,500 r/min V 60
Item Unit
Model
Worldwide F20A F25A
USA, CANADA — F25X
* Cranking 1: Open circuit
Cranking 2: Related parts are connected.

Yamaha F20A Specifications

General

Brand	Yamaha
Model	F20A
Category	Outboard Motor
Language	English