Service Manual

OIL LEVEL CHECK
WARNING Crankcase pressure can blow out
hot oil, which can cause severe personal injury
Do not check oil while the engine is running.
Correct oil level in the crankcase is required to in-
sure proper lubrication and prevent saturating the
air cleaner paper element with oil.
Always check the oil with the engine stopped and on
a level surface. When checking the oil level, always
screw the oil
fill cap into the dipstick tube until it
lightly seats on the oil
fill tube.
The
oil fill cap has a rubber seal that seats on the oil
fill tube. Inspect this rubber seal and replace if dam-
aged, stretched or missing.
OIL PRESSURE
Refer to Figure 7-1. Install an engine oil pressure
tester in the oil
base as shown. The engine will have
an oil pressure switch
or a 1/8” pipe plug the
tapped hole. Start the engine. After warming up,
measure the idle and maximum speed oil pressure.
If oil pressure is not as specified in Dimensions and
Clearances, the following may
be the cause:
engine
oil level low
clogged oil strainer
defective
oil pump
clogged oil gallery
excessive clearance between crankshaft
jour-
defective relief valve or spring
nal and connecting rod
Determine cause of
low oil pressure and correct as
necessary.
7-2
FIGURE 7-1. CHECKING OIL PRESSURE