Mercury Optimax 115

2
C
TIMING, SYNCHRONIZING & ADJUSTING
90-855347R1 JANUARY 1999 Page 2C-1
ELECTRICAL
Section 2C – Timing, Synchronizing & Adjusting
Table of Contents
Specifications 2C-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Special Tools 2C-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Crank Position Sensor 2C-4. . . . . . . . . . . . . . . . . . . . . . . .
Throttle Cam Adjustment 2C-5. . . . . . . . . . . . . . . . . . . . . .
Maximum Throttle 2C-5. . . . . . . . . . . . . . . . . . . . . . . . .
Throttle Plate Screw 2C-6. . . . . . . . . . . . . . . . . . . . . . .
Throttle Position Sensor (TPS) Adjustment 2C-6. . . . . .
Idle Speed 2C-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Specifications
FULL THROTTLE RPM RANGE 5000 - 5600
IDLE RPM (IN FORWARD GEAR) 550 ± 25
MAXIMUM TIMING: @ WIDE OPEN Not Adjustable Controlled by ECM
IDLE TIMING Not Adjustable Controlled by ECM
SPARK PLUG TYPE
LIGHT DUTY
HEAVY DUTY
SPARK PLUG GAP
NGK: ZFR5F-11
Champion RC12MC4
NGK: PZFR5F-11 (Heavy Duty)*
0.040 in. (1.0 mm)
FIRING ORDER 1-2-3-4-5-6
THROTTLE POSITION SENSOR 1
(INNER TPS)
@ IDLE
@ W.O.T.
3.70 - 4.90 VDC
0.30 - 1.80 VDC
THROTTLE POSITION SENSOR 2
(OUTER TPS)
@ IDLE
@ W.O.T.
0.10 - 1.50 VDC
3.20 - 4.90 VDC
*Standard with engine