Kohler KT19 series II User Manual

SECTION 2
TROUBLESHOOTING
Engine Starts Hard
Defective spark
plugs.
Engine Loses Power
Crankcase low on oil.
Breaker points worn or pitted.
Loose wires or connections.
Restricted fuel tank vent.
Clogged or restricted fuel line.
Broken choke or throttle cable.
Dirt or water in fuel system.
Carburetor not properly adjusted.
Wrong valve clearance.
Air intake or shrouding plugged.
Excessive engine load.
Restricted air filter.
Dirt or water
in fuel system.
Carburetor not properly adjusted.
Defective spark plugs.
High tension leads loose at coil.
Too much oil in crankcase.
Head gasket leaking.
Low engine compression.
Low compression.
Worn cylinder bore.
EXTERNAL ENGINE INSPECTION
Before cleaning or disassembling an engine,
check the external condition-it may give clues
to
what may be found inside the engine once it is
disassembled.
D Check for buildup of dirt and debris on the
engine block and other external surfaces. Pay
close attention to the air intake screen and
cooling fins-a plugged screen or fins can cause
overheating.
D Check for obvious fuel and oil leaks and dam-
aged components.
If excessive oil leakage is evident, this may
indicate an improperly serviced breather sys-
tem. Normally, an engine operates with a slight
vacuum in the crankcase. If pressures build up
in the crankcase from a clogged breather or
piston blow by, oil will be forced out at oil seals,
gaskets, or any other availabile spot.
D Check the air cleaner cover and baseplate for
damage or indications of improper fit and seal.
Also check the seal on the air cleaner cover
wing nut-a missing or damaged seal could
allow dirt to enter the engine.
D Check the air cleaner element. Look for holes,
tears, cracked or damaged sealing surfaces, or
other damage that could allow dirt to enter
engine. Also note if the element is plugged or
restricted, which would indicate that it has
been underserviced.
D Check the carburetor throat for dirt. Dirt in the
throat is further indication that the air cleaner
is not functioning properly.
12
D Check the oil level. Note if the oil is at the
recommended level or if low or overfilled.
D Check the condition of the oil. Drain the oil into
a container-the oil should flow freely. Check
for metal chips and other foreign particles.
NOTE: It is good practice to drain oil at a
location away from the work bench. Be sure to
allow ample time for complete drainage.
Sludge is a natural by-product of combustion,
and a small accumulation is normal. Excessive
sludge formation could indicate several things:
the oil has not been changed often enough,
operating with improper ignition timing, or an
overrich carburetor adjustment, to name a few.
Cleaning Engine
After checking the external condition of the engine,
it should be thoroughly cleaned prior to disassem-
bly. Also, clean all parts as the engine is dis-
assembled. Only clean parts can be accurately
gauged and inspected for wear or damage.
There are many commercially available cleaners
that quickly remove grease, oil, and grime accu-
mulation from engine parts. If such a cleaner is
used, follow the manufacturer's instructions care-
fully. Make sure that all traces of the cleaner are
removed before the engine is reassembled and
placed in operation. Even small amounts of these
cleaners quickly break down the lubricating
properties of engine oils.
BASIC ENGINE TESTS
Crankcase Vacuum
A partial vacuum should be present in the crank-
case when engine is operating at normal tempera-
tures.

Kohler KT19 series II Specifications

General

Brand	Kohler
Model	KT19 series II
Category	Engine
Language	English