IGNITION SYSTEM - 4B - 1990-816462 2-695
Motion Sensor
Removal
1. Disconnect wires (a).
74537
a
a - Wires
2. Crank engine until timing mark is on zero.
3. Remove motion sensor.
IMPORTANT: To simplify motion sensor rein-
stallation, do not turn crankshaft with motion
sensor removed from engine.
Installation
IMPORTANT: After installation, apply Liquid Neo-
prene to all mounting fasteners and ground wires
of the ignition amplifier and ignition coil.
NOTE: The DDIS signals the coil to fire on both com-
pression and exhaust strokes. To install the motion
sensor, number one piston does not have to be TDC
of its compression stroke. Simply align the timing
mark on zero.
1. Crank engine until timing mark is on zero.
2. Align hole [not roll pin hole] in gear with notch on
motion sensor housing. Install new gasket. Apply
Quicksilver 2-4-C Marine Lubricant with Teflon to
gear.
74390
b
a
a - Hole
b - Notch in Motion Sensor Housing
NOTE: When installing motion sensor it may be nec-
essary to turn oil pump drive shaft for alignment with
motion sensor drive shaft.
3. Remove motion sensor cover. Install motion sen-
sor so drain hole is opposite engine block and
sensor is aligned as shown.
74538
b
c
a
a - Drain Hole
b - Toward Engine Block
c - Align These
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