This document provides an index for troubleshooting and repair information for Mercury/Mariner engines. The index covers topics such as fuel systems, ignition systems, gearcases, jet pump units, synchronization, oil injection systems, and more. Individual topics are organized alphabetically and include the relevant page numbers for finding details in the full document.

1. A
Accelerator
pumpcircuit
l0O-125
hpand80jet,
tuelsystem ......332-335
Altematordrivencapacitordischarge
ignition6O-275hp
and65-140
jet,
ignition andelectrical
systems. 424_439
Alternatordrivenignition 135-200hp,
275hp,i05 and140jetV6,
troubleshooting .....l.5-g}
Alternatordrivenignition, mechanical
advance,
75-125
hpand65-80jet,
troubleshooting......
...... 64_j5
Anticorrosionmaintenance,
lubrication
maintenanceandtune-up
....... 226
Antisiphondevices,
fuelsystem . 3f.S_337
B
Batterychargingsystem,
ignition and
electricalsystems ...4OT-415
Batterychargingsystem,
troubleshooting...... . 51_62
Batteryignition andelectrical
Index
systems ....399_407
Bearing housing,lower gearcase
andjet driveunits . . . . . . . . . . 670_6jI
c
Capacitor discharge module
(CDM) ignition
225 and25ohp,
troubleshooting
. . . . . .... 97_Ll0
75-125 hp and 65-80jet,
serialNo. 0G438000-on.
houbleshooting.
. . .. .... 90_97
ignition and electrical
systems. 439_441
Carburetors,fuel system. . . . . . . 30l.-30g
CDM ignition
225 and25ohp,
ignition and electrical
systems. 444_449
75-125 hp and 65-80jet, serialNo.
0G438000-on, ignition and
electrical systems 441-444
CDM module resistance tests
(optional), troubleshooting. . . 1l0_lll
Cooling system flushing, lubrication
maintenanceandtune-up . . . . 229_23I
Corrosion
control,lowergearcase
and
jetdriveunits... ... 579-591
D
DFI airlfuel system
tro u b le sh o o tin g .....
...... 166-177
DI digiral inductive, 200 DFI
tro u b le sh o o tin g .....
...... lll_l2}
Digital inductive ignition, 200 DFI,
ignition and elecaical
systems M9_452
E
EFI fuel system,
tro u b le sh o o tin g .....
...... 129_166
Electrical accessories,
tro u b le sh o o tin g ..... .... 62
Electronic fuel injection (EFI) and
direct tuel injection (DFI),
fu e lsysre m ..... 339-369
Engine submersion, lubrication
maintenance andtune-up . . . 226-229
Engine temperature and overheating,
troubleshooting .... lj7_Lg2
Engine,troubleshooting..... . lg2-lg7

2. 774 IiDEX
F
Fasteners
andtorque,
powerhead .463-465
Fuelprimerandenrichmentsystems,
ffoubleshooting.
. . . . . . . . . . . 123-129
Fuelsystem. ..302-307
accelerator
pumpcircuit,
100-125
hpand80jet.. . . .332-335
antisiphondevices ..335-33i
carburetors .307-309
electronicfuel injection(EFI) and
directfuel injection
(DFr). .339_368
fuelbleed(recirculation)
system. . .381-392
fuel enrichmentvalve,225hp
carburetedmodels...
...... 332
f u e l f i l t e r s . . . . . 3 3 j
fuelhoseandprimerbulb.. . . 338-339
fuelprimervalve,75-2OO
hp,
275hp and35-140
jer,remote
controlmodels ..329-331
tuelpump . .302-307
fuel tanks,integralandportable,
remote. . . 337-338
reedvalveservice. . . 368-381
thermalairvalve,135-200
hp
carburetedmodels
. . . . . .. 331-332
troubleshooting.
. . . . . . . . . . . l2O-123
WME seriescarburetor,
75-L25hp,
6 5 a n d 8 0 j e t . . . . . 3 0 9 - 3 1 6
WMH andWMV seriescarburetors,
135-225
hpand105-140jet
models .316-325
WO series(Mercarb)carburetor,
275hp. . .325-329
Fuelsandlubrication.lubrication
maintenance
andtune-up
. . . . 201-Z2O
Fuses,
ignition andelecfical
systems ....415-416
G
Gear housing, lower gearcaseand
j e t d r i v e u n i t s . . . . . . . . . 5 8 3
Gear ratio, lower gearcaseandjet
drive units. . 577-579
Gearcasecleaning and inspection,
lower gearcaseandjet driv
u n i t s . . . . . . . 6 5 1
Gearcasedisassembly/assembly,
lower gearcaseandjet drive
u n i t s. . . . . . . 6 0 3
Gearcaselubrication, lower gearcase
a n d j e t d r i v e u n i t s . . . . . . . . . . . . .
5 8 1
Gearcaseoperation, lower gearcase
andjetdriveunits... 5i6-5'77
Gearcasepressuretesting, lower
gearcaseandjetdriveunits . . . .. 652
Gearcase
shimming,lowergearcase
andjetdriveunits.. .... 653
Generalinformation,synchronization
andlinkage
adjustments
. . . . . 249-251
H
High-altitudeoperation,
lower
gearcase
andjetdriveunits.. . . . . 578
Hour meter,lubricationmaintenance
andtune-up .200-201
I
Ignitionandelectrical
systems
. .... 399
alternatordrivencapacitordischarge
ignition,60-275hpafi
65-140jet. .....424-438
battery. ....399-407
batterycharging
system. . . .. 407-415
capacitordischarge
module
(CDM)ignition. . .438-441
CDMignition
2 2 5a n d 2 5 0
h p . . . . . . . . . 4 4 4 - 4 4 9
75-125hpand65-80jet,serial
No.0G438000-on
... ... 441-444
digital inductiveignition
200DFI. .449-452
t u s e s . . . . . . 4 1 5 - 4 1 6
startingsystems. ....416-424
Ignition system,
troubleshooting.
. . . .. . . .. . . . . 62-64
Ignition systems,
ignition and
electricalsystems ...... 424
J
Jetdrivemodels,lowergearcase
and
jetdriveunits
.. ....... 661
Jetpumpunit maintenance,
lower
gearcase
andjetdriveunits.. . 661-667
Jetpumpunit service,lowergearcase
andjerdriveunits. . .667-670
L
Lowergearcase
andjetdriveunits. . 576
bearinghousing ....670-671
corrosion
control.. . . . . . . . . . 579-581
geil
housing ..583-593
ratio... ..577-578
gearcase
cleaningandinspection
.. . 651-652
disassembly/assembly.
. . . . 603-651
l u b r i c a t i o n . . . . . . . . . . 5 8 1
operation. 576-577
pressuretesting.
. . . . ..... 652-653
shimming 653-661
high-altihrdeoperation.........
528
jetdrivemodels. ....... 661
jetpump
unitmaintenance.
.... ... 661-667
unitservice ..... 667-670
l o w e r g e a r c a s e . . . . . . . . . 5 7 6
propeller .. 581-583
serviceprecautions
.. ...... 578-579
trimtabadjustment ..... 583
waterintake
housing
liner.. . . . . . 67I
waterpump 593-603
Lubricants,
sealants
andadhesives,
powerhead 462-463
Lubricationmaintenance
and
t u n e - u p . . . . . . . 2 0 0
anticorrosionmaintenance
. .. . 226
coolingsystem
flushing. . 228-231
enginesubmersion
... ... 226-228
fuelsandlubrication.
. ... 201-220
hourmeter. ..... 2OO-1OL
off-season
storage 220-226
tune-up . 231-244
M
Mercury/I4ariner
model
identification,
powerhead.
.. .... 460
o
Off-season
storage,
lubrication
maintenance
andtune-up. . . 220-226
Oil injectionsystem. . 732-733
variable-ratioelectronically
controlled
oil injection,200
DFI
models 758-763
variable-ratio
oil injection
135-20},275hpand -
105-l40jetmodels.
... . 739-750
225and250hpmodels
. . . 750-758
75-125hp
and65-80jet
models 733-739
Operath
g requirements,
troubleshooting..... . 35-37
P
!
Po we rh e a d ...... 458
assembly . . 524-570
b r e a k - i n . . . . . . . 4 6 1
cleaning andinspection. . . . . 508-524
disassembly. ...... 480-508
fastenersandtorque 463-465
lubricants,sealantsand
adhesives 462-463 ;
Mercury/I4ariner model
identification ........ 460
removaVinstallation.. . . . . . . 465-480
s e a l i n g s u r f a c e s . . . . . .
. . . . . . . . . 4 6 3
serviceconsiderations.. . . . . 459-460
servicerecommendations.. . 461-462

3. II[DEX 775
Power trim and tilt systemsand
power steering system
power trim and tilt system
service. 702-723
powersteeringsystem. ... 723-729
power trim and tilt
systems. 678-702
Propeller,lower gearcase
andjet
driveunits .. 581-583
R
Reedvalve service,
fuel system . 368-381
Remotecontrol . . . . . . . 765- 771
S
Safetyprecautions,
synchronization and linkage
adjustments. .....248-'249
troubleshooting...... .34-35
Sealingsurfaces,
powerhead. . .. .. 463
Serviceconsiderations,
powerhead .459-460
Serviceprecautions,lower gearcase
andjet driveunits. . . 578-579
Servicerecommendations,
powerhead .46I-462
Starting system,
troubleshooting.
.. ... . 42-51
Starting systems,ignition and
electricalsystems ...416-424
Synchronization and linkage
adjustments. ...248
100-125hp and80jet
models . .256-261
135-200hp carbureted
models . .261-270
150-200hp EFI (electronicfuel
injection) models . 270-276
200 DFI (direct tuel injection)
models . .276-279
225 and 250 hp EFI
models . .287-292
225 hp carbveted models . . . 279-287
275hpmodels ......292-297
75,90hpand65jet
models. ..251-256
general
information .249-251
safetyprecautions.
. . . .... .. 248-249
T
Test and repair
equipment,
troubleshooting.
. . . . . . . . . . .37-42
Thermal air valve,
135-200hp
carbureted
models,
fuelsystem. ....331.332
Trim and tilt systems,
power trim and tilt
systemsand power
steeringsystem. .... 678
Trim tab adjustment,
lower gearcase
a n d j e t d r i v e u n i t s . . . . . . . . . . .5 8 3
Tr oubl e sh o o tin g
..... ..... 3 3
alternator driven
ignition,
135-200hp, 275 hp,
105and 140 iet,V6. . . . . .75-90
alternator driven ignition,
mechanical advance,
75-125hp and
6 5 - 8 0 j e t . . . . . . . 6 4 - 7 5
battery charging
syste m. ....5 1 -6 2
capacitordischarge
module
(CDM) ignition, 75-I25 hp
and65-80jet, serialNo.
0G438000-on ...90-97
capacitor discharge module (CDM):
ignition, 225 and 250 hp. . . . 97-110
CDM module resistancetests,
optional. . 110-111
DFI airituel system. . 166-177
DI, digital inductive,
200DFr llt-r2O
EFItuelsystem. ....129-166
electricalaccessories. .... 62
engine temperature and
overheating ..... 177-182
engine. ... 182-187
fuel primer and enrichment
systems . 123-129
tuel system l2O-I23
ignitionsystem. ..... 62-64
operatingrequirements
... .... 35-37
sa fe typ re ca u tio n s....
....... 34-35
starting
system. ..... 42-5I
test and repair
e q u i p m e n t . . . . . . . . 3 7
Tune-up, lubrication maintenance
andtune-up 231-244
V
Variable-ratio electronically
controlled oil injection,
200 DFI models,oil injection
system. 758-763
Variable-ratio oil injection,
135-200,275hp and
105-140
jet models,
oilinjection system.. . . . .'739-750
225 and250 hp models,oil
injection system . 750-758
75-125 hp and 65-80jet models,
oilinjectionsystem...... 733-739
w
Water intake housing liner, lower
gearcaseandjet drive units. . . . . . 671
Water pump, lower gearcaseand
jetdriveunits. ..... 593-603
Wirin g d ia g ra ms
...... ...... 776-807
WME seriescarburetor,75-l25hp,
65 and 80jet, tuel system. . . 309-316
WMH and WMV seriescarburetor
135-225hp and 105-140jet
models,fuelsystem.
..... 316-325
WO series (Mercarb) carburetor,
275 hp, tuel system. 325-329
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