Briggs & Stratton 130G00 Repair Manual page 58

A. Apply a suitable engine assembly lube to the valve
stem.
B. From the bottom of the cylinder head, insert the
valve stem into the valve guide.
C. To distribute the assembly lube evenly around the
valve stem and guide, hand spin the valve as it is
installed. Work the valve back and forth in the bore
to verify that it slides smoothly and seats properly.
D. Using a suitable degreaser, thoroughly clean valve
face, valve seat, valve guide, and end of valve stem
of any excess assembly lube.
E. Cover the valve stem retainer groove with black
electrical tape. Apply a thin film of clean engine oil
to tape.
NOTE: Inadequate precautions may cause the
valve stem seal to catch the edge of the valve stem
retainer groove. The resulting damage may lead to
leakage around the valve stem causing increased
oil consumption and possible valve sticking.
F. Lightly lubricate inside diameter of new valve stem
seal/washer with clean engine oil.
6
G. Slide valve stem seal/washer down valve stem until
contact is made with machined surface of cylinder
head. Remove black electrical tape and discard.
52
NOTE: Models 13U100 and 13U200 use a different
style valve stem seal. Lightly lubricate inside
diameter, and slide over valve stem to install.
H. Install valve spring over the valve stem and valve
guide.
I. Set the valve spring retainer on top of the valve
spring. Using thumbs to compress valve spring,
guide the end of the valve stem through the larger
offset hole in the valve spring retainer. Continue
pressing down until the smaller center hole engages
the valve stem groove.
J. Verify that the axis of the valve spring is parallel to
the valve stem. A slanting or leaning valve spring
will result in premature valve guide wear.
K. Lightly tap the end of the valve stem once or twice
with a soft mallet to ensure that valve spring retainer
is tightly seated in the valve stem groove.
L. Install valve cap on end of valve stem.
NOTE: On models 13U100 and 13U200, valve cap
is not installed on intake valve.
3. Cover the cylinder head to protect it from dust and dirt
until time of installation.