"3072RT / 3772RT / 3772RT HD" Service & Parts Manual - ANSI Specifications March 2008
Page 3-13
Air Filter Element - Gasoline and Dual Fuel
1. Unlock the catches holding the filter canister cover.
2. Remove the wing-nut from the filter assembly and remove the filter element.
3. Inspect the canister for debris and clean as necessary.
4. Install a new filter element and tighten the wing-nut.
5. Replace the canister cover and lock the catches.
Engine Adjustment - Gasoline and Dual Fuel
The following adjustment points are sealed by the
factory and cannot be adjusted.
• Carburetor Pilot Screw
• LPG Main Pressure Adjustment
Screw
• LPG Idle Pressure Adjustment Screw
• Distributor Ignition Timing Adjustment
Screw
Choke Adjustment - Gasoline and Dual Fuel
1. Loosen the Choke Adjustment Screw until
the linkage rod can move freely.
2. Manually retract the Choke Solenoid
Piston until it stops.
3. While holding the solenoid fully retracted,
close the choke plate until it stops in the
fully closed position.
4. Allow the choke plate to open slightly and
tighten the Choke Adjustment Screw.
5. Check Choke Solenoid operation to ensure that the choke plate travel does not prevent
the Choke Solenoid from retracting fully.
Idle Speed Adjustment - Gasoline and Dual Fuel
1. Bring the engine to operating temperature.
2. With the engine at idle, adjust the Throttle Stop Screw until the engine RPM is 1350±50.
High Speed Adjustment - Gasoline and Dual Fuel
1. Bring the engine to operating temperature.
2. Loosen the adjusting nuts on the Throttle Solenoid.
3. Have an assistant press the Throttle Button on the Lower Controls panel.
4. Adjust the nuts on the Throttle Solenoid Piston until the engine RPM is 3850±50.
5. Tighten the nuts to secure the adjustment.
Choke Adjustment Screw
Idle Adjustment Screw
Throttle Solenoid
Throttle
Solenoid
Adjustment
Throttle
Linkage
Choke
Solenoid
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