1999 Mercury 9.9 HP Outboard Service Manual 9.9HP Motor


 

1999 Mercury 9.9 HP Outboard 2-Stroke Manual

 

INTRODUCTION
 
This 1996 Mercury 9.9 hp manual describes the service procedures for the complete motor. Follow the Engine maintenance schedule recommendations to ensure that the motor is in peak operating condition and the emission levels are with in the standards set by states/county Resources Board. Performing the scheduled maintenance on your outboard engine is very important. It compensates for the initial wear that occurs during the life of the motor.
 
All chapters in this Mercury 1996 9.9 service manual applies to the whole engine and illustrates procedures for the removal and installation of components that are in a detailed step-by-step fashion.
 
Most all 1996 Mercury 9.9 outboard 2-stroke manual chapters start with an assembly or systems illustration, diagrams, exploded parts view, quality pictures, service information and troubleshooting for the section. The subsequent pages give detailed service/repair procedures. If you don't know the source of the trouble, go to the troubleshooting page for a list of causes and effects to determine the problem.
 
 
 
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ATTACHMENTS/CONTROL LINKAGE
Section 7A – Throttle/Shift Linkage (Tiller Handle Shift Models)
Table of Contents
Throttle and Shift Linkage (Tiller Handle Shift) 7A-2
Control Cables (Tiller Handle Shift) . . . . . . . . 7A-4
Removal/Installation . . . . . . 7A-4
Control Platform .. . . . . . . . . 7A-4
Removal/Disassembly . . . . . .  7A-4
Reassembly/Installation . . . . 7A-5
Throttle Cam/Control Lever . . . . . 7A-8
Removal . . .. . . . 7A-8
Reassembly . . . . . . .. . 7A-8
Installation . . .  . . . . . 7A-10
Neutral Interlock Control Lever . .. . 7A-11
Reassembly/Installation . . . .  7A-11
Horizontal Shift Shaft . . . . . 7A-12
Reassembly/Installation . . . . .  7A-12


THROTTLE/SHIFT LINKAGE (TILLER HANDLE SHIFT MODELS)

Control Cables (Tiller Handle Shift)
Removal/Installation
Refer to Section 7C for removal and installation instructions.
Control Platform
Removal/Disassembly

1. Disconnect control cables from anchor bracket and pulley as outlined in Section 7C.
2. Disconnect throttle link rod from ball joint of primary throttle lever.
3. Disconnect shift link rod from ball joint of gear shift lever.

a - Cables
b - Bracket
c - Pulley
d - Link rod
e - Throttle lever
f - Shift link rod
g - Gear shift lever
h - Shift lever
4. Remove 3 bolts and control platform.
5. Remove nuts and flat washers.

a - Bolts
b - Control platform
c - Nuts
d - Flat washers

6. Disassemble control platform.

a - Nuts (2) [Torque to 6.8 Nm ( 60 lb. in.)]
b - Flatwashers (2)
c - Primary throttle lever
d - Spacer (long)
e - Secondary gear
f - Spacer (short)
g - Gear shift lever
h - Control platform
i - Bolts (2)
j - Mount bolts [Torque to 6.8 Nm (60 lb. in.)]

4. Index primary throttle lever into secondary gear.

a - Primary throttle lever
b - Secondary gear
5. Install bolts, washers and nuts. Torque nuts to 6.8 Nm (60 lb. in.).

a - Nuts [Torque to 6.8 Nm ( 60 lb. in.)]
b - Washers
c - Bolts
6. Secure assembled control platform onto cylinder block using 3 bolts. Torque bolts to 6.8 Nm (60 lb. in.).

7. Adjust shift link rod to a length of 13.0 cm (5-1/8 in.) as measured between ball joint centerlines.
8. Connect shift link rod between joints of gear shift lever and shift shaft lever.

a - Shift link rod [Adjust to length of 13.0 cm (5-1/8 in.)]
b - Shift shaft lever
c - Gear shift lever

9. Adjust throttle link rod to a length of 12.4 cm (4-7/8 in.) as measured between ball joint centerlines.

10. Connect throttle link rod between ball joints of primary throttle lever and throttle cam.

11. Connect control cables to pulley of secondary gears and anchor bracket as outlined in

a - Primary throttle lever
b - Pulley
c - Control cables
d - Throttle cam
e - Anchor bracket
f - Throttle link rod [Adjust to length of 12.4cm (4-7/8 in. )]

Throttle Cam/Control Lever
Removal
1. Refer to Section 7C for removal of throttle cables.
2. Remove bolt and flat washer securing cam/lever to powerhead.

a - Bolt
b - Washer
c - Cam/lever

Reassembly

1. Assemble inner spring and outer spring together.
2. Position spring assembly over hub of throttle cam.

a - Inner spring
b - Outer spring
c - Inner spring ends
d - Outer spring ends
e - Hub
f - Tabs

3. Wind end of inner spring to position tab of cam between inner spring ends. Verify spring windings are firmly held around diameter of cam hub and that no windings are positioned on top of hub.

4. Lubricate bushing with 2-4-C with Teflon and install bushing and wave washer.

a - Inner spring end
b - Tab
c - Cam hub
d - Bushing
e - Wave washer

5. Install control lever onto throttle cam assembly so that tab of control lever is positioned between ends of inner spring.

6. Hook longer spring end of outer spring behind peg of control lever.

a - Control lever
b - Tab
c - Ends of inner spring
d - Longer spring end
e - Peg

Installation

1. Secure throttle cam/control lever assembly onto mounting boss of crankcase cover with bolt. Torque bolt to 7.9 Nm (70 lb. in.).

2. Connect timing link between ball joints of control lever and trigger assembly.

a - Throttle cam
b - Control lever
c - Flat washer
d - Bolt [Torque bolt to 7.9 Nm (70 lb. in.)]
e - Timing link
f - Control lever

3. Adjust throttle link rod to a length of 12.4 cm (4-7/8 in.) as measured between ball joint center lines.

4. Connect throttle link rod between ball joints of throttle cam and primary throttle lever.

a - Throttle link rod [Adjust to a length of 12.4 cm (4-7/8 in.)]
b - Throttle cam
c - Primary throttle lever

Neutral Interlock Control Lever

Reassembly/Installation

1. Lubricate bushing with 2-4-C with Teflon and install bushing and spring.

2. Secure interlock lever components with bolt onto mounting boss of crankcase cover.

a - Bushing
b - Spring
c - Interlock lever
d - Spring ends
e - Flat washer
f - Bolt [Torque to 7.9 Nm (70 lb. in.)]
g - Neutral interlock wire (install in top hole)