Mercury 40 Service Manual page 98

Specifications
TIMING
*Suppressor (resistor) spark plug
Special Tools
Service Tachometer P/N 91-854009A1
1.
*May be obtained locally.
Timing Light P/N *91-99379
2.
*May be obtained locally.
90-852572R1 JANUARY 1998
Idle
Maximum Timing
@ Cranking Speed
-Model 40/50/60
-Model 55
@ 5000 RPM
– Model 50/60
– Model 55/60
Idle RPM
Wide Open Throttle (W.O.T.) RPM
Spark Plug Type
Spark Plug Gap
Firing Order
NGK BP8H-N-10
*NGK BPZ8H-N-10
NGK BP8HS-10
0.040 in. (1.0mm)
Spark Gap Tool P/N 91-63998A1
3.
T.D.C. 2
24 B.T.D.C.
18 B.T.D.C.
22 B.T.D.C.
16 B.T.D.C.
675 25
5000-5500
NGK BUZ8H
1-2-3
ELECTRICAL - 2C-1