
4A-19
90-13645--2
495
POWERHEAD
Check Valves
DESIGN I (MODELS WITH CHECK VALVE ONLY)
Located in crankcase cover under center main
bearings.
These can be damaged by hot combustion blow-by
into crankcase.
To Check: Look through hole - if you see light, the ny-
lon ball is bad - probably melted; REPLACE valve. If
you see no light, insert fine wire into check valve hole
to see if there is slight movement of the nylon ball; if
ball moves, valve is o.k. otherwise, replace check
valve.
b
c
a
a - Check-Valve Body
b - Nylon Ball
c - Ball Retainer
IMPORTANT: If it is determined that the check
valves must be replaced or that restrictors are not
installed with the check valves, it is recom-
mended that the Bleed Check Valve/Restrictor Kit
(22-814204A1) be installed.
DESIGN 2 (MODELS WITH CHECK VALVE AND
RESTRICTOR)
BLEED CHECK VALVE/RESTRICTOR KIT
(22-814204A1)
COMPONENTS CONTAINED IN KIT:
25704
a
b
a - Bleed Check Valve (3 Each)
b - Restrictor (3 Each)
This kit is for use in three cylinder 71 cubic inch 70, 75,
80 and 90 horsepower models and four cylinder 105
cubic inch 100 and 115 horsepower models.
NOTE: Three cylinder and four cylinder outboards
with starting serial number OC123214 and above
have these kits installed from factory.
Installation Instructions:
1. Referring to appropriate service manual, remove
powerhead from driveshaft housing.
2. Remove all assemblies as required to obtain ac-
cess to crankcase cover.
3. Remove crankcase cover from cylinder block.
4. Using a 5/32
″
(3.9mm) punch, carefully tap bleed
check valves out of crankcase cover. (Tap check
valve towards crankshaft side of crankcase
cover.)
25703
a
b
c
a - Crankcase Cover
b - Bleed Check Valve
c - Punch (5/32”- 3.9mm)
NOTE: Three cylinder models will require TWO bleed
check valves and TWO restrictors. Four cylinder mod-
els will require THREE bleed check valves and
THREE restrictors.
5. With FUNNEL SHAPE side of restrictor facing
crankshaft side of crankcase cover, carefully tap
restrictor into crankcase cover until seated.
6. With ONE HOLE side of bleed check valve facing
crankshaft, carefully tap check valve into crank-
case cover until seated against restrictor. BE
CAREFUL NOT TO OVERSEAT CHECK VALVE
as check valve case may distort and valve will not
function properly.
Summary of Contents for 100
Page 4: ...GENERAL INFORMATION AND SPECIFICATIONS 1 ...
Page 18: ...IGNITION SYSTEM ELECTRICAL AND IGNITION A 2 ...
Page 30: ...11669 BATTERY CHARGING SYSTEM AND STARTING SYSTEM ELECTRICAL AND IGNITION B 2 ...
Page 58: ...22480 TIMING SYNCHRONIZING ADJUSTING ELECTRICAL AND IGNITION C 2 ...
Page 71: ...WIRING DIAGRAMS ELECTRICAL AND IGNITION D 2 ...
Page 86: ...FUEL SYSTEM AND CARBURETION A 3 ...
Page 118: ...OIL INJECTION SYSTEM B 3 ...
Page 127: ...20032 3 CYLINDER ENGINES POWERHEAD A 4 ...
Page 168: ...791 H GEAR HOUSING LOWER UNIT A 5 ...
Page 170: ...5A 1 90 13645 2 1095 LOWER UNIT Notes ...
Page 205: ...MID SECTION LOWER UNIT B 5 ...
Page 207: ...5B 1 90 13645 2 495 LOWER UNIT Notes ...
Page 218: ...SHOCK ABSORBER LOWER UNIT C 5 ...
Page 223: ...17250 DESIGN I SIDE FILL RESERVOIR POWER TRIM A 6 ...
Page 233: ...6A 9 POWER TRIM 90 13645 2 495 Commander Side Mount Remote Control Wiring Diagram ...
Page 268: ...DESIGN II AFT FILL RESERVOIR POWER TRIM B 6 51344 ...
Page 305: ...SINGLE RAM POWER TRIM C 6 51485 ...
Page 309: ...6C 3 90 13645 2 495 POWER TRIM Notes ...
Page 340: ...50099 ENGINE ATTACHMENTS ENGINE INSTALLATION 7 A ...
Page 369: ...TILLER HANDLE AND CO PILOT OUTBOARD MOTOR INSTALLATION ATTACHMENTS 7 B ...
Page 371: ...7B 1 90 13645 2 495 OUTBOARD MOTOR INSTALLATION ATTACHMENTS Notes ...