Install Valves; Install Intake Valve And Seal; Install Exhaust Valve - Briggs & Stratton Twin Cylinder L-Head Repair Manual

INSTALL VALVES

Install Intake Valve and Seal

1. Coat valve stem with Valve Guide Lubricant
#93963 and install in intake valve guide until stem
just starts to enter valve tappet chamber, Fig. 18.
NOTE: Be sure valve guide lubricant, Part
#93963, is not on valve face, seat or
retainer grooves.
2. Place new valve stem seal, valve spring and valve
spring retainer in valve spring compressor, Tool
#19063, and compress completely.
a. Metal side of valve stem seal faces valve
spring.
b. Large hole in retainer should face away from
jaws.
3. Insert compressed spring, seal and retainer into
valve tappet chamber.
4. Push valve stem through valve stem seal and
large hole in valve spring retainer, Fig. 19.
5. Lift up on compressor to engage small hole of
retainer on shoulder of valve stem and slowly
release spring compressor until jaw contacting
retainer is free.
6. Lift out compressor. Repeat for other cylinder.
Rotate crankshaft to check for proper valve
opening and closing.

Install Exhaust Valve

Coat valve stem with Valve Guide Lubricant #93963.
1. Place exhaust valve spring and rotator or retainer
into valve spring compressor, Tool #19063, and
compress spring completely.
2. Insert compressed spring into valve tappet
chamber and slide coated exhaust valve stem in
through exhaust valve guide, through spring and
rotator or retainer until valve seats.
3. Hold spring against cylinder head side of valve
tappet chamber and insert split valve keepers in
valve stem retainer grooves, Fig. 20.
a. A light coat of grease will help hold keepers on
stem.
4. Move spring down onto keepers and while keeping
light downward pressure on keepers, slowly
release valve spring compressor.
5. Repeat for second cylinder. Rotate crankshaft to
check for proper valve opening and closing.
8
13
Fig. 18
END
OF
VALVE
LARGE
PUSH
HOLE
VALVE
IN
RETAINER
Fig. 19 – Installing Intake Valve
GREASE
Fig. 20 – Installing Exhaust Valve
INTAKE
VALVE
STEM
LIFT UP ON
COMPRESSOR
TO ENGAGE
RETAINER
RELEASE
COMPRESSOR