Kohler KT19 series II User Manual

Normal: Even after long hours of operation a valve can
be reconditioned and reused if the face and margin are in
good shape. If a valve is worn to where the margin is less
than 1/32" do not reuse it. The valve shown was in
operation for almost 1000 hours under controlled test
conditions.
Stem Corrosion: Moisture in fuel or from condensa-
tion are the most common causes of valve stem corro-
sion. Condensation occurs from improper preservation
during storage and when engine is repeatedly stopped
before it has a chance to reach normal operating tem-
peratures. Replace corroded valves.
Bad Condition: The valve depicted here should be
replaced. Note the warped head; margin damaged and
too narrow. These conditions could be attributed to
excessive hours or a combination of poor operating
conditions.
45
SECTION 7
DISASSEMBLY
Leakage: A poor grind on face or seat of valve will
allow leakage resulting in a burned valve on one side
only.
Coking: Coking is normal on intake valves and is not
harmful. If the seat is good, the valve could be reused
after cleaning.
Gum: Gum deposits usually result from using stale gaso-
line.
This condition is often noted in applications where
fuel is not drained out of tank during the off season. Gum
is a prevalent cause of valve sticking. The cure is to ream
the valve guides and clean or replace the valves, depend-
ing on their condition.

Kohler KT19 series II Specifications

General

Brand	Kohler
Model	KT19 series II
Category	Engine
Language	English