Yamaha F25 [48/444] Maintenance specifications

Yamaha F20 BMHS [48/444] Maintenance specifications
2-7
SPEC
E
MAINTENANCE SPECIFICATIONS
CDI unit output peak voltage
(B/W O)
@ cranking 1* V 152
@ cranking 2* V 101
@1,500 r/min V 123
@3,500 r/min V 161
Spark plug gap mm (in) 0.8 ~ 0.9 (0.031 ~ 0.035)
Charge coil resistance
(W/G G/W)
660 ~ 710
Pulser coil resistance 300 ~ 350
Ignition coil resistance
Primary 0.08 ~ 0.11
Secondary k 3.49 ~ 4.72
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 V 6
@1,500 r/min V 25
@3,500 r/min V 66
open circuit
@ cranking V 15
@1,500 r/min V 25
@3,500 r/min V 66
Electrothermal valve coil
resistance (Y/B Y/B)
6.7 ~ 7.1
Engine temperature sensor
resistance
@ 5 ˚C (41 ˚F) k 2.5
@ 20 ˚C (68 ˚F) k 1.25
@ 70 ˚C (158 ˚F) k 0.176
Over revolution limit r/min 5,920 ~ 6,080
Overheat speed control r/min 2,000 ~ 3,000
STARTING SYSTEM
Fuse A 20
* Cranking 1: Open circuit
Cranking 2: Related parts are connected.
Item Unit
Model
Worldwide F20A F25A
USA, CANADA F25X

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