Rocker Arm/Push Rod; Removal; Cleaning And Inspection; Installation - Mercury 305 CID Service Manual

3. Carefully install manifold assembly and torque
bolts to 18 lb. ft. (24 N·m) in sequence as shown.
1
5
FRONT
7 3
4. Connect all electrical leads.
5. Connect hoses to thermostat housing.
6. Install fuel line and sight tube to carburetor and
fuel pump.
7. Connect crankcase ventilation hoses to rocker
arm covers.
8. Install distributor. Position rotor and housing to
align with marks made during removal, then in-
stall distributor cap.
9. Install other ignition components and reconnect
wires.
10. Coat threads of oil pressure sending unit with
Quicksilver Perfect Seal and install.
11. Connect any other items which were discon-
nected from manifold during removal.
12. Start engine. Adjust ignition timing and carbure-
tor. Check hose connections, gaskets and seals
for leaks.
13. Inspect fuel line connections for fuel leaks.

Rocker Arm/Push Rod

Removal

NOTE: When servicing only one cylinder's rocker
arms, bring that cylinder's piston up to TDC before re-
moving rocker arms. When servicing all rocker arms,
bring No. 1 piston up to TDC before removing rocker
arms.
1. Remove rocker arm covers as outlined.
Index
90-823225--1 1096
2. Remove rocker arm assemblies and push rods.
IMPORTANT: Place rocker arm assemblies and
push rods in a rack for reassembly in their origi-
4 8
nal locations.

Cleaning and Inspection

6
2
1. Clean parts with solvent and dry with com-
72878
2. Inspect all contact surfaces for wear. Replace all

Installation

IMPORTANT: When installing rocker arms and
rocker arm balls, coat bearing surfaces of rocker
arms and rocker arm balls with engine oil.
1. Install push rods in their original locations. Be
2. Install rocker arms, rocker arm balls and rocker
3. Adjust valves as outlined under "Valve Adjust-

Valve Adjustment

Engine Stopped

With valve cover removed, adjust valves when lifter
is on low part of camshaft lobe, as follows:
1. Crank engine with starter or turn over in normal
pressed air.
damaged parts.
sure push rods seat in lifter socket.
arm nuts in their original locations.
ment - Engine Stopped."
direction of rotation until mark on torsional damp-
er lines up with center "0" mark on timing tab, and
engine is in No. 1 firing position. This may be de-
termined by placing fingers on No. 1 valve as
mark on torsional damper comes near "0" mark
on timing mark. If valves move as mark comes up
to timing tab, engine is in No. 6 firing position and
should be turned over one more time to reach No.
1 position.
ENGINES - 3A-27