Kohler CH18 Service Manual page 123

Install Muffl er
1. Install port liners (if equipped), slotted end fi rst, into
exhaust ports until fi nger tight. (Exhaust components
will press them to fi nal depth.) Install exhaust
gaskets and muffl er on exhaust studs.
2. Install muffl er and attaching hardware to muffl er
bracket. Torque screws to 9.9 N·m (88 in. lb.).
3. Install nuts to exhaust studs. Torque hex nuts to
24.4 N·m (216 in. lb.), lock nuts to 27.8 N·m (246 in.
lb.).
Install Oil Cooler (if equipped)
Oil cooler can now be installed to engine. Two diff erent
styles are used.
1. Depending on style used, reverse removal
procedure from Disassembly.
2. Secure cooler or adapter to oil pan with oil fi lter
nipple. Torque oil fi lter nipple to 27 N·m (20 ft. lb.).
Install Oil Filter and Fill Crankcase with Oil
NOTE: Make sure both oil drain plugs are installed and
torqued to specifi cations to prevent oil leakage.
1. Install oil drain plug(s). Torque plug(s) to 13.6 N·m
(10 ft. lb.). If oil drain valve is used, make sure valve
body is closed and cap is on.
2. Place new fi lter in shallow pan with open end up. Fill
with new oil until oil reaches bottom of threads. Allow
2 minutes for oil to be absorbed by fi lter material.
3. Apply a thin fi lm of clean oil to rubber gasket on oil
fi lter.
4. Refer to instructions on oil fi lter for proper
installation.
5. Fill crankcase with new oil. Level should be at top of
indicator on dipstick.
6. Reinstall oil fi ll cap/dipstick and tighten securely.
24 690 06 Rev. P
Connect Spark Plug Leads
Connect leads to spark plugs.
Prepare Engine for Operation
Engine is now completely reassembled. Before starting
or operating engine, be sure to follow these steps.
1. Make sure all hardware is tightened securely.
2. Make sure oil drain plugs, Oil Sentry
switch, and a new oil fi lter are installed.
3. Adjust carburetor, idle fuel needle, or idle speed
adjusting screw as necessary.
Testing Engine
It is recommended engine be operated on a test stand or
bench prior to installation in piece of equipment.
1. Set engine up on a test stand. Install an oil pressure
gauge. Start engine and check to be certain oil
pressure (20 psi or more) is present. Run engine at
idle for 2-3 minutes, then 5-6 minutes more between
idle and midrange. Adjust carburetor mixture settings
as necessary (as available).
2. Adjust idle speed screw and high-speed stop as
necessary. Make sure maximum engine speed does
not exceed 3750 RPM (no load).
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Reassembly
pressure
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