5030801 JOHNSON LEAD ASSY., Spark plug, No. 1

Table 1
Specifications for 349-4716 Mech Gp - Valve    
Callout     Part Number     Part Name     Specification Description    
4     349-4732     Rocker Arm     Diameter of the rocker arm bore is
25.013 to 25.051 mm (0.9848 to 0.9863 inch).
Maximum clearance of the rocker arm bore is
0.089 mm (0.0035 inch).
Service limit of the rocker arm bore is
0.17 mm (0.0067 inch).    
5     349-4732     Rocker Arm     Diameter of the rocker arm bore is
25.013 to 25.051 mm (0.9848 to 0.9863 inch).
Maximum clearance of the rocker arm bore is
0.089 mm (0.0035 inch).
Service limit of the rocker arm bore is
0.17 mm (0.0067 inch).    
7     349-4729     Shaft As     Diameter of the rocker shaft is
24.962 to 24.987 mm (0.98275 to 0.98374 inch).    Disassembly Procedure
Start By:
Remove the rocker shaft assembly. Refer to Disassembly and Assembly, "Rocker Shaft and Pushrod" for the correct procedure.
Keep all parts clean from contaminants.Contaminants may cause rapid wear and shortened component life.
Personal injury can result from being struck by parts propelled by a released spring force.Make sure to wear all necessary protective equipment.Follow the recommended procedure and use all recommended tooling to release the spring force.
Make an identification mark on each rocker arm assembly in order to show the location.Note: The components must be reinstalled in the original location. Do not interchange components.
Illustration 1 g02520576
Remove the Torx screws from the rocker shaft assembly. Note position of different length Torx screws for assembly purposes.
Remove retaining clip (2) from rocker shaft (7). Remove spring (3) from the rocker shaft.
Remove rocker arm assembly (4) for the inlet valve from rocker shaft (7). Remove rocker arm assembly (5) for the exhaust valve from rocker shaft (7) .Note: The rocker arm assembly for the inlet valve is longer than the rocker arm assembly for the exhaust valve.
Remove retaining clip (8) from rocker shaft (7). Remove spring (9) from the rocker shaft.
Remove rocker arm assembly (4) for the exhaust valve from rocker shaft (7). Remove rocker arm assembly (5) for the inlet valve from rocker shaft (7) .
Repeat Step 5 through Step 6 in order to remove the remaining rocker arms from rocker shaft (7) .
If necessary, follow Step 8.a through Step 8.c in order to remove threaded inserts (1) from the rocker arms.
Make a temporary identification mark on each threaded inserts (1) in order to show the location.Note: The components must be reinstalled in the original location. Do not interchange components.
Remove guide (6) from threaded inserts (1) .
Remove threaded inserts (1) from the rocker arms.Assembly Procedure
Keep all parts clean from contaminants.Contaminants may cause rapid wear and shortened component life.
Ensure that all components are clean and free from wear and damage. If necessary, replace any components that are worn or damaged.
Illustration 2 g02520576
If necessary, follow Step 2.a through Step 2.b in order to install threaded inserts (1) to the rocker arms.
Loosely install threaded inserts (1) to rocker arm assembly (4) and rocker arm assembly (5) .Note: The components must be reinstalled in the original location. Do not interchange components.
Install guide (6) onto threaded inserts (1) .Note: Ensure that ALL threaded inserts are fully unscrewed after the installation of the guide .
Lubricate the bores of rocker arm assembly (4) for the inlet valve and rocker arm assembly (5) for the exhaust valve and rocker shaft (7) with clean engine oil.
Install retaining clip (2) and spring (3) to the front end of rocker shaft (7) .
Install rocker arm assembly (4) for number one inlet valve to the rocker shaft. Install rocker arm assembly (5) for number one exhaust valve to rocker shaft (7) .Note: The rocker arm assembly for the inlet valve is longer than the rocker arm assembly for the exhaust valve. Used components should be installed in the original location.
Improper assembly of parts that are spring loaded can cause bodily injury.To prevent possible injury, follow the established assembly procedure and wear protective equipment.
Install retaining clip (8) to rocker shaft (7) .
Install spring (9) to rocker shaft (7) .
Install rocker arm assembly (4) for number two inlet valve to the rocker shaft. Install rocker arm assembly (5) for number two exhaust valve to rocker shaft (7) .Note: The rocker arm assembly for the inlet valve is longer than the rocker arm assembly for the exhaust valve. Used components should be installed in the original location.
Repeat Step 6 through Step 8 in order to assemble the remaining components to rocker shaft (7) .
Install the Torx screws to the rocker shaft assembly. Ensure that the different length Torx screws is installed into the correct position.End By: Install the rocker shaft assembly. Refer to Disassembly and Assembly, "Rocker Shaft and Pushrod" for the correct procedure.