Clean all parts thoroughly as engine is disassembled.
Only clean parts can be accurately inspected
and gauged for wear or damage. There are many
commercially available cleaners that will quickly remove
grease, oil, and grime from engine parts. When such a
cleaner is used, follow manufacturer’s instructions and
safety precautions carefully.
Make sure all traces of cleaner are removed before
engine is reassembled and placed into operation. Even
small amounts of these cleaners can quickly break down
lubricating properties of engine oil.
Shut off Fuel Supply/Empty System
WARNING
Explosive Fuel can cause fi res and severe
burns.
If a gaseous odor is detected, ventilate area
and contact an authorized service technician.
Propane is extremely fl ammable and is heavier than air
and tends to settle in low areas where a spark or fl ame
could ignite gas. Do not start or operate this engine
in a poorly ventilated area where leaking gas could
accumulate and endanger safety of persons in area.
To ensure personal safety, installation and repair of
propane fuel supply systems must be performed only
by qualifi ed propane system technicians. Improperly
installed and maintained propane equipment could
cause fuel supply system or other components to
malfunction, causing gas leaks.
Observe federal, state and local laws governing
propane fuel, storage, and systems.
1. Relieve fuel pressure at lock-off . Shut off tank valve. If
possible, run engine in a well-ventilated area until fuel
system is empty and engine stops. If unable to run
engine, work in a well-ventilated area and carefully
loosen inlet fuel fi tting on vaporizer/regulator, slowly
venting off fuel from line. When fuel is dispensed,
retighten fi tting and remove quick connect fi tting to
allow fuel to escape from line.
Disconnect Spark Plug Leads
NOTE: Pull on boot only, to prevent damage to spark
plug lead.
Disconnect leads from spark plugs.
Drain Oil from Crankcase and Remove Oil Filter
NOTE:
Some models are equipped with an oil drain valve.
1. Remove oil fi ll cap/dipstick, and 1 oil drain plug.
2. Allow ample time for oil to drain from crankcase and oil
fi lter.
3. Remove mounting screw and oil fi ll tube.
4. Remove and discard oil fi lter.
Remove Oil Cooler
1. Use an 8 mm Allen wrench to remove oil fi lter
threaded nipple.
2. Separate fi lter adapter from oil pan, leaving oil lines
attached. Remove screws mounting oil cooler to
blower housing, then remove cooler, lines, and fi lter
adapter with O-ring, as an assembly.
Remove Muffl
er
NOTE: Removing oxygen sensor is not required to
remove exhaust system.
1. Remove exhaust system and attaching hardware
from engine.
2. Disconnect oxygen sensor connector from wire
harness.
Remove Air Cleaner Assembly
Heavy Duty Air Cleaner
1. Remove nuts securing air cleaner to mounting studs.
2. Remove screws securing air cleaner assembly to
mounting bracket and remove air cleaner assembly.
Low-Profi le Air Cleaner (Optional)
1. Loosen retaining knob and remove cover.
2. Remove wing nut from element cover.
3. Remove element cover, element and precleaner.
4. Remove nuts securing base. Additional screws must
be removed from lower air cleaner support bracket.
5. Remove base.
Remove Top Mount Control Panel
1. Remove throttle control shaft nut on top of throttle
shaft and remove throttle control lever, washer, and
spring.
2. Remove screws fastening control bracket and
remove bracket from blower housing.
3. Remove lower throttle control bracket from cylinder
head.
M
Ignition Coil
N
Barrel Baffl e
O
Valley Baffl e
P
Breather Cover
Q
Breather Cover
Gasket
R
Oil Sentry
™
S
Oil Temperature
Sensor
T
Throttle Body
Assembly
U
Air Temperature
Sensor
V
Dipstick Tube
W
Oil Fill Cap/Dipstick
X
Air Cleaner
Y
Breather Hose
Z
Breather Separator
AA
Crankshaft Position
Sensor (Later
Design Bracket)
Disassembly/Inspection and Service
63
24 690 31 Rev. D
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