Hol-Gar GS-107-AC Generator Set

Tools: Tachometer, Screwdriver

1. Hold sensitivity stud with a screwdriver.
2. Turn speed adjusting nut clockwise to increase speed.
3. Use a tachometer to indicate engine speed.
4. Relocate spring in governor arm notches for coarse sensitivity.
5. Turn sensitivity stud counterclockwise to increase sensitivity.
6. Adjust for maximum sensitivity without hunting.

⚠ Do not force needle valves against their seats

1. Warm up engine; verify ignition system and governor are adjusted.
2. With engine idling, turn idle adjustment out until speed drops slightly.
3. Turn needle in until speed returns to normal.
4. Apply a full load to the engine.
5. Override governor and check acceleration.
6. Adjust main needle outward 1/2 turn; repeat until no lag.
7. Set throttle stop screw for 1/32 inch clearance at no load.

Tools: Feeler gauge

1. Check clearance with engine at room temperature (about 70 F).
2. Turn flywheel so cylinder is 10 degrees past TDC of compression stroke.
3. Adjust clearance with the self-locking nut.
4. Set intake clearance to 0.012 inch and exhaust to 0.015 inch.

⚠ Always check change plates are properly connected for intended use and are secure

1. Select the plate or plates for the desired output.
2. Secure plate(s) to the connection board as shown on the diagram.
3. Make load connections at the load terminals as indicated.
4. Store unused plates on the studs of the connection board cover.
5. Replace cover.

⚠ Do not disassemble magneto unless witness marks are made for correct reassembly

Tools: Timing light

1. Remove No. 1 spark plug; turn flywheel until pressure builds.
2. Continue turning until the 25 degree mark aligns with timing pointer.
3. Turn magneto until white mark on rotor is visible in window.
4. Mount magneto on studs with gasket; mesh gears.
5. Run engine and use timing light for exact timing.
6. Tighten magneto mounting securely.

⚠ Do not start engine if oil is too cold to flow

1. Run engine until oil is warm.
2. Drain oil from the oil base.
3. Reinstall drain plug.
4. Fill crankcase to FULL mark with proper grade (6 quarts).
5. Check for leaks.

⚠ Do not use emery or conductive abrasive cloth

Tools: Grade OO flint paper

1. Slip grade OO flint paper between contact surface and brush, flint facing brush.
2. Move paper in one direction only; lift and return.
3. Repeat until proper brush surface is obtained.
4. Seat all brushes; new brushes may spark until seated.
5. Operate generator at light load to wear brushes in.

Tools: Oil filter wrench (box or strap type)

1. Place a drip pan below the filter.
2. Unscrew oil filter counterclockwise by hand or with a filter wrench.
3. Clean filter mounting area.
4. Oil the new gasket and install new filter hand tight.
5. Turn an additional 1/4 turn with a filter wrench.

1. Remove the foam element.
2. Wash element thoroughly in gasoline or diesel fuel.
3. Saturate with SAE 20W motor oil.
4. Squeeze as dry as possible.
5. Reinstall element; replace only if damaged.

1. Allow unit to warm thoroughly before connecting load.
2. Apply load in steps (1/4, 1/2, 3/4, full) at 30 minute intervals.
3. Place load switch (circuit breaker) in ON position.
4. Check voltage and adjust with voltage adjustment knob.
5. Check meters for proper readings; if overload, stop unit and adjust load.

Tools: Hand crank

1. Prime carburetor with fuel pump priming lever about 15 strokes; return lever inward.
2. Set engine switch in START position.
3. Set hand choke as required by local temperature.
4. Engage hand crank with handle at 7 o'clock position.
5. Pull crank to 12 o'clock with sharp steady pull; remove when engine starts.
6. Place engine switch in RUN position.
7. Check oil pressure; it should be at least 20 psi.
8. Readjust choke as engine warms.

⚠ Stop button at engine magneto can also ground magneto to stop engine; return panel switch to STOP

1. Disconnect as much load as possible.
2. Place load switch (circuit breaker) in OFF position.
3. Allow engine to idle a short time.
4. Place engine switch in STOP position.
5. Place fuel valve in OFF position.