BRP Johnson 4HP Service Manual page 20

GENERAL INFORMATION
*SPECIFICATIONS
Item
ELECTRICAL
Ignition timing
Over revolution limiter
Ignition coil resistance
Spark plug cap resistance
Battery charge coil resistance (Optional part)
Battery charge coil output (12V) (Optional part)
Standard spark plug
GEARCASE
Design specification thickness for shim and washer
Pinion gear backup shim
Forward gear backup shim
Forward gear thrust washer
Reverse gear thrust washer
Reverse gear backup shim
Initial selection-shim adjustment may be required.
1-14
Unit
Degrees
r/min
Secondary
kΩ at 20°C
kΩ at 20°C
Ω at 20°C
AMP
Type NGK
Gap mm (in)
mm (in)
mm (in)
mm (in)
mm (in)
mm (in)
Data
4 HP 5 HP
BTDC 3° – 28°
6000
8.4 – 12.4 [H.T.cord – pulser core]
7.5 – 12.5
0.6 – 1.0 [R – Y]
6-7
BPR6ES
0.7 – 0.8 (0.028 – 0.031)
2.0 (0.08)
1.2 (0.05)
1.0 (0.04)
1.0 (0.04)
0.8 (0.03)
6 HP