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Author Topic:   Built-In Gas Tank Cleaning
Ray posted 09-20-2002 09:13 PM ET (US)   Profile for Ray   Send Email to Ray  
I have a 1985 Revenge 25'. I have quite a bit of water and debris in the gas tank. I have pumped much of it out with a small diameter hose connected to a primer bulb which I push down a fuel line on top of the tank. This seems to work well. What I am wondering is has anybody removed the small metal hatch on top of the fuel tank to gain better access into the tank for cleaning. I do not want to remove the entire tank (140 gallons cap.) to do this. If I remove this hatch what kind of sealant do I use to reseal it. From the looks of it someone has removed it before. Just a note, there are two elbow connectors in this hatch. One goes to the engine. The other is capped off.
Thanks for any advice.
Ray
Drisney posted 09-21-2002 12:32 PM ET (US)     Profile for Drisney  Send Email to Drisney     
Hi Ray, I just opened the aft fitting (pick up tube) on my Revenge 22. The metal plate had a corresponding threaded metal circle on the inside of the tank. 6 screws or so held the two together. When I had it apart the only thing keeping the inner circle from dropping into the tank was the sealant. Keep a magnet on a string handy !! Dave
Drisney posted 09-21-2002 12:34 PM ET (US)     Profile for Drisney  Send Email to Drisney     
OOps, forgot to mention , my tank is plastic not aluminum...Dave
Knockerjoe posted 09-21-2002 10:12 PM ET (US)     Profile for Knockerjoe  Send Email to Knockerjoe     
you can take that ring off no problem. it has a round rubber gasket. if it is in good shape you can reuse it. it does not require a sealant unless there is warpage or corrosion on tank or plate. you will see blobs of water floating on the bottom if there is water. you can use a hand bilge pump to suck the water and junk off the bottom...good luck!
tflyer posted 09-22-2002 12:58 PM ET (US)     Profile for tflyer  Send Email to tflyer     
Ray: I had a similar problem with my '81 Frontier 25 last year, I have two 70gal. Alum tanks below the main deck and like you did not wish to remove them for cleaning, This was my approach:
I drained both tanks down to about 4or 5 gals in each. I removed the fuel guage on the top of each tank giving me access to the inside. I then chained the nose of my trailer to the front buckett of my back-hoe and raised the bow as high in the air as possable, thus allowing the remaining fuel, water and other crap to collect in the back corners. Using a small 12volt fuel pump rigged with a long pick-up tube ( a length of copper tubing ) I was able to vacume the rear corners of each tank into a large plastic bottle, allowing me to see the results, It did a good job. Be sure to change the filters and carry spares. Also, be certain to do this procedure out-side and make any electrical connections well away from the open tanks. This worked fine for me and I've had no problems since. I do change the filters often!...Tom
tflyer posted 09-22-2002 01:01 PM ET (US)     Profile for tflyer  Send Email to tflyer     
Ray: I had a similar problem with my '81 Frontier 25 last year, I have two 70gal. Alum tanks below the main deck and like you did not wish to remove them for cleaning, This was my approach:
I drained both tanks down to about 4or 5 gals in each. I removed the fuel guage on the top of each tank giving me access to the inside. I then chained the nose of my trailer to the front buckett of my back-hoe and raised the bow as high in the air as possable, thus allowing the remaining fuel, water and other crap to collect in the back corners. Using a small 12volt fuel pump rigged with a long pick-up tube ( a length of copper tubing ) I was able to vacume the rear corners of each tank into a large plastic bottle, allowing me to see the results, It did a good job. Be sure to change the filters and carry spares. Also, be certain to do this procedure out-side and make any electrical connections well away from the open tanks. This worked fine for me and I've had no problems since. I do change the filters often!...Tom

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