0313435 RESTRICTOR,Exhaust housing JOHNSON
20R69B, 20R70C, 20R71S, 20R72R, 20R73A, 25E72R, 25E73A, 25E74M, 25E75B, 25E76E, 25R69B, 25R70C, 25R71S, FD-22A
RESTRICTOR
Price: query
Rating:
Number on catalog scheme: 6
Compatible models:
BRP JOHNSON entire parts catalog list:
- LOWER UNIT GROUP » 0313435
20R71S, 20RL71S 1971
20R72R, 20RL72R 1972
20R73A, 20RL73A 1973
25E72R, 25EL72R, 25R72R, 25RL72R 1972
25E73A, 25EL73A, 25R73A, 25RL73A 1973
25E74M, 25EL74M, 25R74M, 25RL74M 1974
25E75B, 25EL75B, 25R75B, 25RL75B 1975
25E76E, 25EL76E, 25R76E, 25RL76E 1976
25R69B, 25R69D, 25RL69B, 25RL69D 1969
25R70C, 25R70E, 25RL70C, 25RL70E 1970
25R71S, 25RL71S 1971
FD-22A, FD-22E, FD-22M, FDL-22A, FDL-22E, FDL-22M 1968
Information:
Table 1
Required Tools
Tool Part Number Part Description Qty
A 4C-6366 Valve Guide Driver 1 Start By:
Remove the inlet and exhaust valves and remove the valve stem seals. Refer to Disassembly and Assembly, "Inlet and Exhaust Valves - Remove and Install".
Keep all parts clean from contaminants.Contaminants may cause rapid wear and shortened component life.
Note: When new valve guides are installed, new valves and new valve seat inserts should be installed.
Illustration 1 g01369083
Typical example
Use Tooling (A) and a suitable press in order to remove valve guides (1) from the cylinder head. Refer to Illustration 1.
Remove the valve seat inserts. Refer to Disassembly and Assembly, "Inlet and Exhaust Valve Seat Inserts - Remove and Install".Installation Procedure
Table 2
Required Tools
Tool Part Number Part Description Qty
A 4C-6366 Valve Guide Driver 1
B 4C-6370 Valve Guide Collar 1
C 157-3720 Valve Seat Cutter 1
Keep all parts clean from contaminants.Contaminants may cause rapid wear and shortened component life.
Illustration 2 g01369084
Typical example
Position valve guides (1) in the cylinder head. Carefully tap the valve guides with a soft faced hammer in order to locate the valve guides in the cylinder head.Note: Ensure that the valve guides are located squarely in the cylinder head.
Use Tooling (A), Tooling (B) and a suitable press in order to install the valve guides in the cylinder head. Press the valve guides until Tooling (B) bottoms out on the cylinder head.Note: The counterbore in Tooling (B) ensures that the valve guides are installed to the correct height.
Check the protrusion (X) of the valve guides. Refer to Specifications, "Cylinder Head Valves" for the protrusion of the valve guide above the valve spring recess in the cylinder head.
Install the valve seat inserts. Refer to Disassembly and Assembly, "Inlet and Exhaust Valve Seat Inserts - Remove and Install".
Illustration 3 g01000177
Note: After installing the valve guides and valve seat inserts, the valve guides must be reamed and the valve seat inserts must be cut to the finished diameter. The valve guides and valve seat inserts are cut and reamed in one operation. This procedure ensures the concentricity of the valve seat to the valve guide in order to create a good seal. Refer to Specifications, "Cylinder Head Valves" for the finished diameter of the valve guides and valve seat inserts.
Position Tooling (C) into the valve guide. Carefully turn Tooling (C) in a clockwise direction and gradually move the reamer into the valve guide until the valve guide is reamed to the finished size.
Continue to turn Tooling (C) in a clockwise direction in order to cut the valve seat insert. Remove the minimum amount of material in order to ensure a good valve seat. Keep the valve seat as narrow as possible.
Remove Tooling (C). Clean the debris from the valve guide and the valve seat.End By: Install the inlet and exhaust valves. Refer to Disassembly and Assembly, "Inlet and Exhaust Valves - Remove and Install".