Acceleration Ignition Timing Control - SELVA MARINE Kingfish 25 Service Manual

TECH
FEA

Acceleration ignition timing control

When the engine is accelerated rapidly, the ignition timing is changed as shown in the following
graph.
Control-starting condition
Rapid acceleration
a
30
25
20
15
10
5
0
0 1000
a Ignition timing (BTDC)
b Engine speed (r/min)
1 Basic ignition timing
2 Acceleration ignition timing
2-5
Technical features and description
1500 2000 2500
Control time
1 second
3000 3500 4000
Ignition timing
Changes from line 1 to line 2
in the graph.
4500 5000 5500
1
2
b
6200