Genesis 310 NG to LPG conversion issue


 
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Dan Torres

New member
First, I know that Weber does not support or endorse fuel conversions, though this seems pretty straightforward. I tried to search this site for relevant threads first. I also addressed the safety lockout feature in the regulator and that didn’t fix. So I’m getting a nice clean blue flame on all burners, however they are very small. Also when I turn the control knob on any of the burners there is no change to the flame size whatsoever. Any thoughts on this and maybe next steps? Thanks, Dan
 
Bottom line is that LP and NG manifolds are different in orifices AND valves.

Can’t swap one and not the other.

At that point it’s really just basically swapping the entire manifold itself.

Can’t “convert” them any other way.
 
Welcome Dan !

The Genesis 3xx grills have different valves and to get the grill to work properly you need to replace the NG valves with LPG valves or replace the manifold which will include new valves.

I went through this a while ago. When I finally got my hands on a set of LP valves I did a close comparison in this thread.

DanHoo

Thread 'E330 NG and LP manifold and valve side by side comparison'

I finally found an original 2016 Genesis E330 LP manifold for a fair price. AR date code.

Last year I converted my E330 NG to LP using orifices and a regulator as I could not find a manifold in stock anywhere. It is also a 2016 AR date code.

I have the original NG orifices and hose from my E330NG. I had given them away but they were never used so I have them once again.

My plan is to compare the two manifolds and valves and orifices side by side including the internals.

Notes:

1. There is already an excellent post documenting valve differences. There is a great deal of...
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Also, I suggest mounting the propane tank on the outside for a few reasons:
1. you don't have to drill a hole in the floor
2. your NG E310 doesn't have a heat shield on the slide out drip pan
3. you don't lose all that storage space inside
4. it looks cool with a tank cover

DanHoo

Thread 'Outboarding the propane tank on a 2016 Genesis E330'

My E330 was converted from NG to LP.

I've been putting off cutting a hole in the floor so the propane tank would mount properly on the tank hanger / scale.

When I saw @JohnS FL restore his 2009 E310 and relocate the tank outboard on the RH side, I decided to move the tank outside on my E330.

Works great. I gain storage space inside and I plan to add a spare tank holder on the left hand side.

20211223_161217.jpg

I moved the mount for the hardline to the outside.

20211223_161134.jpg
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I just remembered there are E310s with the controls on the side.

I think the guidance is the same which is replace the valves or the manifold.
 
I think we are getting ahead of ourselves talking about replacing manifolds. It seems the problem is low flames. Provided the OP did indeed address the regulator safely valve issue correctly, I would next try a new tank. I hooked up one of my rehabs last week and could get zero gas flow. I disconnected it and reconnected and had the same problem. I grabbed another tank and hooked it up and all was good. I have no idea what the problem was. I have had other grills on the first tank and had zero problems.

After that, I would consider a problem with the regulator. If you have another hose/regulator handy, just swapping them would be a good test. After that, then maybe it is time to start looking at manifolds and valves and orifices.
 
Bruce said:
I would next try a new tank. I hooked up one of my rehabs last week and could get zero gas flow. I disconnected it and reconnected and had the same problem. I grabbed another tank and hooked it up and all was good. I have no idea what the problem was. I have had other grills on the first tank and had zero problems.
Click to expand...
Funny that you say this, exact same thing happened to me a week or two ago.

I rolled out a Silver B into my driveway for sale as someone was on their way to pick it up. I decided, on a whim, to check the burners again. Would not light. At all.

I started panicking. The guy would arrive in like 5 mins. Wouldn’t light. Wouldn’t light. Wouldn’t light.

I grabbed another tank. Lit up immediately.

I tried the first tank on another grill, lit up immediately.

Now I know this “can” and “does” happen.
 
Low flames and "they don't change". Again, OP the ONLY safe way to do this is a manifold swap and the proper LP regulator and line. Going from NG to LP is actually harder to do correctly than the other way. I know how to do the other way without swapping a manifold. But, it's complicated and not meant for public consumption.
So find yourself a manifold, a proper regulator and fittings.
 
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