Maintenance - Mercury Optimax 115 Service Manual

Wiring Diagram – Gauge needle to point toward slow running engine
a -
b -
c -
d -
Wiring Diagram – Gauge needle to point toward fast running engine
a -
b -
c -
d -

Maintenance

Clean gauge by washing with fresh water to remove sand and salt deposits. Wipe off with
a soft cloth moistened with water. The gauge may be scored or damaged if wiped with
abrasive material (sand, saline or detergent compounds, etc.) or washed with solvents
such as trichloroethylene, turpentine, etc.
90-855347R1 JANUARY 1999
a
GRY=GRAY
WHT=WHITE
BLK=BLACK
PUR=PURPLE
Tachometer Starboard Engine
Synchronizer Gauge
Tachometer Port Engine
Synchronizer Module
a
GRY=GRAY
WHT=WHITE
BLK=BLACK
PUR=PURPLE
Tachometer Starboard Engine
Synchronizer Gauge
Tachometer Port Engine
Synchronizer Module
c
c
b
b
d
d
51107
c
c
b b
d d
51107
WIRING DIAGRAMS
Page 2D-15