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MAINTENANCE/SERVICE
Gasoline Engine
(continued)
GASOLINE ENGINE BELTS
IMPORTANT:
When installing
new
belts,
never
pry·
belt over
pulley.
Loosen necessary
component
hardware and adjust belt
tension.
Re-adjust
tension of a new belt
after
a short
run-in
period.
(About
5
hours.)
To adjust
tension:
1.
Loosen necessary mounting hardware
on
component driven by belt to be
adjusted.
2.
For alternator and governor belts, adjusttension
so that a force of 8 to 12
lbs.
(35
to
55 N)
deflects the belt 3/8
inch
(10
mm) at midpoint
of longest span.
NOTE:
When moving governor to adjust governor
belt
tension,
keep governor parallel to key guides
to
prevent misalignment of throttle rod.
·
3.
For compressor
belt,
adjust
tension
so that
a
force
of 8 to 12
lbs.
(35
to
55 N) deflects
the
belt 3/16 inch (5 mm) at
mid-span.
4.
Tighten hardware
and recheck
tension.
SPARK
PLUGS
-
GAS ENGINE
Spark plugs should be
kept clean to
ensure
optimum engine operation.
Every
200
hours
or once
per
operating
season,
remove plugs and
examine their
condition:
Normal
-
A few
light tan or grey
deposits.
Cold
Fouling
-
Carbon (dry,
black)
deposits.
Indicates an
over-rich fuel-air
mixture.
Wet
Fouling
-
Excess oil. Indicates
worn rings
or
cylinders,
except
in
a new engine, where wet
fouling may occur before normal oil
control is
achieved.
Oyer
Heating
- White-to-light grey Insulator with
blistered
appearance. Indicates over-advanced
timing or an
interruption in engine coolant
flow.
Oil
or Oil Ash Encrusted
- Indicates
oil in combus-
tion chamber.
Plugs found in
"Normal" condition
(or "Wet Fouled"
plugs in new or recently overhauled engines) may
be cleaned, re-gapped
and
reinstalled. Re-gap to
0.035
inch
{0.89
mm).
When installing plugs, torque to 30 ft.lbs. (40
N
•
m). Replacement plugs should be Champion
RN
12
Y or equivalent.
53
A
-
A/C Compressor
C
-
Water Pump
E
-
Compressor Belt
G
-
Alternator
/Water Pump Belt
B
-
Alternator
D
-
Governor
F
-
Gov.
Belt
BELTS
-
GASOLINE ENGINE
CHECK PLUG
CLEARANCE
BENO
HERE
SET PLUG
CLEARANCE
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