Coleman 425 Maintenance Manual

Liquid Fuel Stove Maintenance

Coleman 2-burner liquid fuel stove

1. Fill the tank 7/8ths full with white gas (Coleman fuel). Check the tank cap seal by holding the fuel tank upside down and looking for leaks.

2. Pump the tank 10 to 20 times, with the control valve closed. Plug the tank and generator into the stove so that it fits securely in the proper spot. (The generator rod should be plugged into burner body).

3. Make sure that the secondary burner-regulating key (on left side of stove) is turned off.

4. Turn the lighter stem on the generator/valve assembly to the Up position.

5. Open the control valve and light the primary (right) burner. After one minute of burning, turn the lighter stem to the down position. Adjust the flame with the control valve and by pumping up the tank.

6. The second (left) burner can now be ignited by turning on the regulating key on the left side of the stove and lighting the burner with a match.

Note: You can effectively preheat this stove by putting Coleman fuel or Meta-paste in the primary burner bowl under the generator stem, lighting it, and allowing it to burn down before turning on the stove and lighting the stove.

Five Major Stove Problems

1. Insufficient preheating.

2. Clogged jet.

3. Air leak in the system (seals and “O” rings).

4. Wrong jet. (Multi-fuel models)

5. Contaminated fuel.

Stove Troubleshooting

Fuel Leakage:

• At fuel bottle: Fuel cap (or pump) not tight.

• At connectors: Seals or “O” rings damaged.

• At pump: Pump valve or seals are damaged.

• At jet: Control valve is stripped.

• 1” to 1 ½” flame at the gas tip/ manifold connection behind the burner:

Though not hazardous, the flame can leave soot on pans used on the stove. Remove tank and generator assembly, allow it to cool down then loosen the brass gas tip about half a turn and tighten it back down. This will re-seal the threads and prevent the leak.

Limited or No Fuel:

• No pressure: Pump up fuel tank.

• No fuel: Tank is empty; jet is clogged; fuel tube is clogged; and/or fuel is

too cold.

Pump won’t work:

• Dry cup: Oil the pump cup.

• Dirty pump: Clogged check valve.

Reduced Performance through Jet:

• Lack of fuel: Check fuel level -- pump up pressure-tank.

• Obstructions: Clean jet. Improper jet.

• Too cold: Improperly insulated from snow -- warm fuel tank in sleeping

bag.

Erratic Burning/Surging:

• Pressure too great: Control valve opened too far.

• Improper jet: Kerosene being burned in “G” jet.

• Gas being burned in ”K” jet: Stove is cold. Burner not adequately

preheated.

+ 3 hidden pages