ZENAIR CH2000 SERVICE MANUAL
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SECTION VI
POWER PLANT
GENERAL
The CH2000 is powered by a Lycoming engine Model O-235-N2C rated at 116 BHP at 2800
RPM. The engine has a compression ratio of 8.1 to 1 and requires 100/100LL octane fuel. The
engine has a light weight starter, 60 amp 12 volt alternator, voltage regulator, shielded ignition,
vacuum pump drive, fuel pump and a carburetor with air intake box and filter. The exhaust
system is stainless steel with heater shrouds to supply heat for both the cabin and carburetor. The
engine is equipped with a Sensenich fixed pitch, all metal propeller, Model 72-CK-0-46 or 48.
TROUBLESHOOTING
Troubles peculiar to the power plant are listed in the Lycoming manual (See Section I) along with
their probable causes and suggested remedies. When troubleshooting the engine, ground the
magneto primary circuits before performing any checks on the engine by connecting an electric
wire from magneto terminal to the screw marked GD (Ground) on the magneto. Refer to
following paragraphs for procedures for removal and replacement of engine components.
REMOVAL OF PROPELLER - Fig.12
1. (Optional) Remove the screws and remove the spinner.
2. Remove the six propeller bolts and remove the propeller.
3. (Optional) Remove the spinner mounting plate.
REINSTALL the propeller with the plate between the propeller and crankshaft flange.
(See Fig. 12)
Tighten the six propeller bolts. (See Sensenich manual for torque.)
Before installing the spinner, check the propeller for track..
Safety the propeller bolts.
Screw the optional spinner to its plate.
PROPELLER TRACKING CHECK
1. Place a box or other fixed object at the lower tip while the propeller is vertical.
2. Mark the line of one tip on the box.
3. Rotate the propeller 180 degrees and compare the location of the other tip with respect
to the first.
4. They must pass within 1/16 inch or 2mm of the same line. If they are further apart, loosen
and tighten the propeller bolts until the tracking is satisfactory.
Feb-00 6.1
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