Hi I have 2 burner Coleman LPG stove about 12 yrs old and the flame on both burners is slowly getting lower and lower when knobs on full. The gas bottle is full. Why is this? Can I clean it/jets somehow? Thanks Garry

Are you stating that the igniter will not work. Is the igniter failing to produce an ark? Are you stating that the burners fail to be supplied with gas. With both the bottle's valve open and the stove turned on. Make sure the propane bottle has gas first. Is the bottle heavy and do you feel liquid moving around inside like water if you move the bottle around in the air? Check the valve. You can not open the valve quickly. On these 20lb. bottles. You must turn the knob very slowly or the bottle will slug. You will need to shut the gas flow off, wait a minute for it to equalize and try it again. Open the gas flow slowly(at the bottle). Now try to light the stove. If the stove is still not lighting you can try another bottle but more than likely the regulator has gone bad and will need to be replaced.

Does the flame height, when turned to HIGH on the burners, appear to be lower than normal? If so, it's one of two things:

1. You are low or about ready to run out of gas in the tank. Check gas level in tank.

2. The grill's regulated is partially locked up. Turn the tank valve OFF. Disconnect the hose from the tank. Wait 5 minutes and reconnect the hose to the tank. Open the tank valve VERY, VERY SLOWLY (Slow motion, slow). Once the valve is fully open, light the burner farthest from the grill first and turn it to HIGH. Did the burner light and does the flame height look correct? If so. light the remaining burners the same way. Do ALL of the flame heights look correct? If so, you solved the problem. Remember to always open the tank valve Very, Very Slowly.

If none of the above solved the problem and (hint) the burners are clean and not clogged. You need to replace the grill's Hose/Regulator Assembly. You can purchase one at any home center or hardware store that sells gas grills and accessories. They run about $30.00. Take your old one with you, just for comparison purposes.

Hope this helped you troubleshoot and solve the problem. Please let me know. Thanks and Happy Grilling!!

The oven safety valve has to be cranked down for propane.
Get a good fitting wrench and tighten this spud down and open the air shutter on the burner.
This video shows how to tackle a crank down and flip type LP conversion whilst yours might be a bit more fancy it still must be adjusted like any other stove:



If you need further help, reach me via phone at https://www.6ya.com/expert/dan_73bbd84fe1d95b61

It may still have air in the system, turn on one burner on and allow the gas to flow with a lighter in the path of the gas see if the gas lights of at least explodes I mean until it goes Poof, once it does that if it does not light then pull the top off the stove and adjust the vents on the pipes to focus the flames and how much air is blended in with the gas, also turn the burner so that the holes are half way open, I am not sue about your stove but most have an adjustment by turning the burner 1/4 of a turn to change the flame characteristics. if this does not help post here and I will see what else I can find out on your stove. I need the modle of the stove and the regulator number where the gas hooks up.

Are you pumping the tank up all the way? I have the same problem if I have too little pressure in the tank. The instructions say pump 35 times. Try pumping 50 or 60 times- that seems to help.

Also, you can't light this one like an old 425. My old stove you could turn the gas on and then take a match neat the burner. For this stove, hold the match near the burner with the gas off and quickly turn it on.

These are two things that seemed to help me with the same problem.

There is water in your fuel. Drain the tank and flush it out with denatured alcohol. Refill with fresh fuel.

Silver solder up all burner jets and redrill to .6 mm then reset adjusters so you get a nice blue flame with small orange tips.and oven burner to .8mm i have just done a new world 75 last week.Works perfect

How long have you had this range?

Replace the regulator on the gas line.

so you have a yellow flame, not blue?
my mate had same problem. He now uses unleaded, adding 10 drops Redex to a gallon.
He was also told not to overfill the tank - just 3/4 full.
Works much better but he says not perfect.
Ian