I am pretty sure the regulator uses a backwards thread, so watch out for that.
Your tank should have a pressure gauge and it is linear. Propane holds about 
250 PSI from 100% full to about 1% full and then drops rapidly to 0. CNG starts 
around 2000 PSI and when it gets to 1000 it is half used and 500 is 3/4s used 
and so on.
I bought an adapter from FleaBay and fill my CNG tank at a gas station for CNG 
cars. I think it costs about $2 for a fill ☺
Please do be careful. CNG is a *little bit* safer than propane because it is 
lighter than air, so a leak will float up to your nose level instead of filling 
from the bilge on up. It is still a flammable gas, so leaks are still 
dangerous, as the crew of Deepwater Horizon found out the hard way. I turn my 
tank off when not in use. I use my propane rail mount grill a lot to save CNG 
and save heat in the cabin, so I usually fill my CNG tank once a year. That is 
mainly coffee and eggs in the morning, hot water for dishes, and the occasional 
loaf of bread or roast in the oven.
Joe
Coquina

From: CnC-List [mailto:[email protected]] On Behalf Of 
damian.greene--- via CnC-List
Sent: Wednesday, June 13, 2018 4:05 AM
To: Ray Macklin via CnC-List <[email protected]>
Cc: [email protected]
Subject: [EXTERNAL] Re: Stus-List CNG Gas Stove Instructions

Ray,

There is not much to this. Others may elaborate, but here's my take:

Your primary concern should be to check for leaks - most likely around the 
regulator. Check along the length of the line first for any obvious damage or 
kinks. Check the flex lines. Maybe you have a separate shutoff valve inside the 
boat, or a solenoid-actuated shutoff - likely not with an older CNG setup. With 
the stove off, open the tank-top valve to pressurise the line. Use soapy water 
on the fittings and look for bubbles. When you first try to light the stove, 
it'll take a while as you have to first bleed the air from the line. Never 
leave the stove unattended, and shut off at the cylinder when not in use.

CNG is safer than propane, but with some major downsides. The key difference 
between CNG and LPG is that you have compressed gas, not liquid - so a LOT LESS 
fuel. With CNG you have a bottle like a scuba tank, and those tanks are heavy!  
They are also a pain to find a place to swap out or fill. Expect to use your 
tank up pretty quickly. You may have a pressure gauge on your regulator - 
you'll see it drop pretty soon with use.

Regards,

Damian

===========================================================

On Tuesday, June 12, 2018, 11:47:42 PM GMT+1, Ray Macklin via CnC-List 
<[email protected]<mailto:[email protected]>> wrote:


Hello
I have a 1985 C&C 33 that has a CNG gas stove  I had the tank refilled but 
since I bought the boat I was to afraid to try it without instructions. I would 
hate to Go kaboom. Does anyone have instructions or a video of how to use it?  
Then I could eat breakfast on the boat.

Hopeful
Ray
LakeHouse
Milwaukee WI.
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