Weak flame from gas hob

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Crinan12

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Folks help me please
Just arrived at boat and have very weak flame from cooker hob (both rings are weak)
It's as if it's just about to run out
Gas bottle is almost new
Was fine last time I was here
Hoses aren't kinked or anything

What else can I check?

Thanks
 
I get a similar problem.. Its like the gas barely comes out when turned on but gets a little stronger over a minute..
The regulator is the only thing that could restrict the flow? Not changed mine yet to see if that cures it..
 
Ours usually starts weak for a few seconds as well

I'll buy a new regulator and see how that goes

A banana and Oatcakes for dinner then

At least I won't go hungry. Should be thankful really.
 
I had quite a few used plastimo pieces of sh... sry i mean cookers.. the burners oxidise as plastimo love putting disimilar metals together leading to a very poor flame and sometimes the flame is around 10mm away from the burner..
Changed to a 3 burner dometic which is all stainless to avoid the flame problem, now the flame just seems a lot less than the same one that my friend has ...
I have a brand spanking new gas bottle !
 
It's completely trivial to check gas pressure after the regulator, and I suggest you do this (although I agree with others that the regulator is most likely to blame - did you know they should be replaced every 6 years; how old is yours?).

To check the pressure make a manometer with a length (say 4') of transparent tube. make a U shape and fill it about 1/2 full with water. Attach one end to the gas feed to the cooker and leave the other open. Turn on the gas. The water should displace to a height difference between input and the open end of about 30cm (1 cm of water = 1 milliBar pressure). Modern regulators, and appliances, work at 30mB.
 
jdc said:
It's completely trivial to check gas pressure after the regulator, and I suggest you do this (although I agree with others that the regulator is most likely to blame - did you know they should be replaced every 6 years; how old is yours?).

To check the pressure make a manometer with a length (say 4') of transparent tube. make a U shape and fill it about 1/2 full with water. Attach one end to the gas feed to the cooker and leave the other open. Turn on the gas. The water should displace to a height difference between input and the open end of about 30cm (1 cm of water = 1 milliBar pressure). Modern regulators, and appliances, work at 30mB.
Click to expand...
6 years? Who comes up with these timescales!
I'm not sure how old the regulator is. I bet it is way way older than 6 years though.

Why is it trivial to check pressutr after the regulator (just out of interest)

Thanks
 
Crinan12 said:
6 years? Who comes up with these timescales!
I'm not sure how old the regulator is. I bet it is way way older than 6 years though.

Why is it trivial to check pressutr after the regulator (just out of interest)

Thanks
Click to expand...

10 years is the replacement interval recommended by Calor.
.
 
The interval is determined by the standards bodies. They err on the side of caution but 6 years, imho, is not at all stupid; regulators are cheap yet safety critical - why be parsimonious here of all places? BS EN 16129 Annexe M is probably worth a read, but <rant>wtf are standards not free? Why so expensive? it's a rip off and good only for mega corporations </rant>.

Why is it trivial (to check pressure)? It just is. It's a happy accident maybe that the density of water and the acceleration due to gravity on earth are what they are, but it makes for simple construction of an apparatus to read pressure in the few tens of millibars range.
 
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Yeah sure its just 6 years seems funny, they tend to love 1,5, 10 or whatever. Anyway not important. Well it is but you know what I mean

I've ordered a new regulator. Even has a built in guage telling me how much gas is left. £10 delivered. Amazing.
 
Assume that it reads the bottle pressure, very crude way of doing it and very inaccurat,e. The only practical way is by weight.
 
It's probably the regulator. The air vent hole in the top can become crusted up and they cannot equalise with the ambient pressure. Giving them a tap sometimes helps, butt he only long term solution is replacement.

We gave up on "marine" regulators a number of years ago, now buy them online or from a camping shop and replace each year. I always keep a spare on board just in case. Once I started treating them like impellers or fuel filters and accepted they are cr*p the decision was easy :cool:
 
Moodysailor said:
It's probably the regulator. The air vent hole in the top can become crusted up and they cannot equalise with the ambient pressure. Giving them a tap sometimes helps, butt he only long term solution is replacement.

We gave up on "marine" regulators a number of years ago, now buy them online or from a camping shop and replace each year. I always keep a spare on board just in case. Once I started treating them like impellers or fuel filters and accepted they are cr*p the decision was easy :cool:
Click to expand...
Re tapping, see my post #18 :)
 
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