I am thinking about converting our CNG system to propane and wonder what others have experienced. We want to get cheaper fuel and add a Force 10 heater which is propane fueled also. The first concern is where to mount the tank. I am considering putting it in a compartment in the port lazarette next to the steering pedestal. My surveyer says that it must open to the outside and drain overboard - so I thought of making a box with an access door which opens from the centermost side of the port lazarette (right next to your left leg when standing at the wheel). Anybody done this? What size of tank? How big is the box, etc??? Thanks, Patrick
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Steve Moss
Check with Hunter
I have a 95 Hunter 37.5 that is factory equipped with Propane. The tank is mounted in a fibreglass insert in the port transom locker. This is sealed so as nothing can get into the locker. Check with Hunter - they should be able to supply you with this insert.
I have a 95 Hunter 37.5 that is factory equipped with Propane. The tank is mounted in a fibreglass insert in the port transom locker. This is sealed so as nothing can get into the locker. Check with Hunter - they should be able to supply you with this insert.
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Paul Akers
In the archives
Somewhere in the archives there are pictures of RAINBOW CHASER (H37c) who did a similar conversion and added an external compartment on the transom for his propane. He did a good job.
Somewhere in the archives there are pictures of RAINBOW CHASER (H37c) who did a similar conversion and added an external compartment on the transom for his propane. He did a good job.
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Jim Ewing
Hose the problem
Hi Patrick, I researched this when we got Prospect and the concensus is that the big PITA is replacing the gas hose. Everything else is pretty straightforward. I like the earlier post of the factory tank isert. Make sure you can carry at least 20lbs. Hunter does very well at replacement parts. They built me a new cabinet face and door for about what the lumber alone would have cost me. We ended up not doing the conversion because CNG is easy to find in FL and very cheap ($2.50 to fill up both tanks). Let me know how it works out. Jim "Prospect"
Hi Patrick, I researched this when we got Prospect and the concensus is that the big PITA is replacing the gas hose. Everything else is pretty straightforward. I like the earlier post of the factory tank isert. Make sure you can carry at least 20lbs. Hunter does very well at replacement parts. They built me a new cabinet face and door for about what the lumber alone would have cost me. We ended up not doing the conversion because CNG is easy to find in FL and very cheap ($2.50 to fill up both tanks). Let me know how it works out. Jim "Prospect"
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Don
I you want to sell your CNG stove, let me know
dcdon@hotmail.com. We have a ready supply here on the Chesapeake Bay. Tx.
dcdon@hotmail.com. We have a ready supply here on the Chesapeake Bay. Tx.
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Justin Wolfe/PYI
No need to sell stove
A CNG stove easily converts to Propane just by changing the jets on the burners. My parents did this on their Hunter 43 without any trouble. Location of the tanks is really the challenge.
A CNG stove easily converts to Propane just by changing the jets on the burners. My parents did this on their Hunter 43 without any trouble. Location of the tanks is really the challenge.
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Paul Akers
SafeGas?
If you have the SafeGas brand of stove with or without the oven, there is a propane convesion kit for the stove.
If you have the SafeGas brand of stove with or without the oven, there is a propane convesion kit for the stove.
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Richard Owen
I converted a 40.5
I went through this procedure a few years ago. It wasn't a big problem, but was fairly expensive the way I did it. I purchased a sealed box which was built for storing propane tanks. It has a drain, which I piped through the transom.The box held 2 tanks, which were 10 lb aluminum. I replaced the hose with an approved propane hose, and converted the stove. If you have the right stove, the oven will be converted simply by changing the setting - our's had a slotted adjustment screw with LPG at one setting and CNG at the other. If you don't have the right stove, you will have to purchase a new gas valve which is probably a few hundred dollars. The burner orifices will have to be changed - either new ones or solder and re-drill the ones you have to the right size. It's a lot easier to find replacements. When I did our boat, I wanted to be sure that everything was 100%, so I put in the solenoid with gas detection. Good Luck Richard Owen
I went through this procedure a few years ago. It wasn't a big problem, but was fairly expensive the way I did it. I purchased a sealed box which was built for storing propane tanks. It has a drain, which I piped through the transom.The box held 2 tanks, which were 10 lb aluminum. I replaced the hose with an approved propane hose, and converted the stove. If you have the right stove, the oven will be converted simply by changing the setting - our's had a slotted adjustment screw with LPG at one setting and CNG at the other. If you don't have the right stove, you will have to purchase a new gas valve which is probably a few hundred dollars. The burner orifices will have to be changed - either new ones or solder and re-drill the ones you have to the right size. It's a lot easier to find replacements. When I did our boat, I wanted to be sure that everything was 100%, so I put in the solenoid with gas detection. Good Luck Richard Owen
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Eric van Soeren
Want to sell your CNG Tank?
I considered switching because of the difficulty of getting CNG, but decided instead to stay with CNG and add a spare tank. I am now looking for spare used CNG tank, so if you go ahead and no longer need your old CNG tank, let me know.
I considered switching because of the difficulty of getting CNG, but decided instead to stay with CNG and add a spare tank. I am now looking for spare used CNG tank, so if you go ahead and no longer need your old CNG tank, let me know.
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Paul Akers
I bought a spare...
...tank a few years ago. I couldn't find any used ones around. They go back into the CNG tank pool anyway, so you won't end up with a new one. The cost 3 years ago was $200.
...tank a few years ago. I couldn't find any used ones around. They go back into the CNG tank pool anyway, so you won't end up with a new one. The cost 3 years ago was $200.
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Richard Owen
Eric: I have one for sale
Eric: I still have the tank I removed from my 40.5 2 years ago (complete with reg and hoses) and if you are interested e-mail me at rowen@direct.ca. I keep my boat in Vancouver, and will be there again on the 23rd of July. Let me know. Richard Owen
Eric: I still have the tank I removed from my 40.5 2 years ago (complete with reg and hoses) and if you are interested e-mail me at rowen@direct.ca. I keep my boat in Vancouver, and will be there again on the 23rd of July. Let me know. Richard Owen
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Bryan C.
CNG tanks = SCUBA tanks?
Aren't CNG tanks the same as SCUBA tanks? The CNG tank on my boat sure looks like one, is marked like on (DOT regs), has the same capacity as a steel SCUBA tank (2250 PSI), is threaded with the same threads on top, and was hydro tested by a dive shop. Why spend $200 for a used one when you can by a new tank at a dive shop for about $100?
Aren't CNG tanks the same as SCUBA tanks? The CNG tank on my boat sure looks like one, is marked like on (DOT regs), has the same capacity as a steel SCUBA tank (2250 PSI), is threaded with the same threads on top, and was hydro tested by a dive shop. Why spend $200 for a used one when you can by a new tank at a dive shop for about $100?
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Paul Akers
I think so
I beleive that SCUBA tanks are the same. The markings also indicate that the steel alloy is the same. But remember that you still have to buy the valve and have it professionally installed. I think the price would come out more expensive, if not the same. And, then again, the tank would go into the tank pool and you may never see it again.
I beleive that SCUBA tanks are the same. The markings also indicate that the steel alloy is the same. But remember that you still have to buy the valve and have it professionally installed. I think the price would come out more expensive, if not the same. And, then again, the tank would go into the tank pool and you may never see it again.
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