11.23
Section 11
Reassembly
11
Figure 11-72. Installing Muffl er.
Prepare the Engine for Operation
The engine is now completely reassembled. Before
starting or operating the engine, be sure to do the
following:
1. Make sure all hardware is tightened securely.
2. Make sure the oil drain plugs, Oil Sentry
™
pressure switch (if so equipped), and a new oil
fi lter are installed.
3. Fill the crankcase with the correct amount,
weight, and type of oil. Refer to oil
recommendations and procedures in the ‘‘Safety
and General Information’’ and ‘‘Lubrication
System’’ sections.
4. Adjust the carburetor, idle fuel needle, or idle
speed adjusting screw as necessary. Refer to the
‘‘Fuel System and Governor’’ section.
Muffl er
Hex. Flange Screws
Muffl er Bracket
5. Before starting the engine, turn the engine
over slowly by hand. If it can be turned over
completely and compression is noted, the
engine can be test run. If, however, it cannot be
turned over completely (locks up at some point),
return the piston to TDC between the intake
and exhaust strokes and wait ten minutes to
allow the lifters time to bleed down, then check
for compression again. If still improper, repeat
the hydraulic valve lifter and rocker arm/pivot
assembly installation, for the head confi guration
used.
Testing the Engine
It is recommended that the engine be operated on a
test stand or bench prior to installation in the piece of
equipment.
1. Set the engine up on a test stand. Install an oil
pressure gauge. Refer to ‘‘Lubrication System’’
section, Figure 6-9. Start the engine and allow it
to idle for 90 seconds. Check to be certain that
oil pressure (40 psi or more) is present. Run
the engine for 5-10 minutes between idle and
mid-range. Adjust the carburetor settings as
necessary.
2. Make sure the maximum engine speed does not
exceed 3750 RPM. Adjust the throttle and choke
controls and the high speed stop as necessary.
Refer to the ‘‘Fuel System and Governor’’ section.
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