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#1
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Water in fuel tank.
I am new to this site, invited by a deep purple fan. Anyway , I inherited a 1989 v20 with water in the gas tank. My question is what is the best method to completely empty the tank, and how can I tell if the tank is still good. It has 30 gallons of fuel + the water.
This is my 2nd v20, and I got a lot of good service in the Gulf of Mexico & Breton Sound with the 1st one (a 1982). Thanks for your help. pjayswell. 
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#2
07-22-2015, 11:54 AM
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Gravity draining through the fuel line might not work and you may need an in-line fuel pump to pump it out.
They usually cost $50 at the auto parts store. If you are not opposed to pulling the cover off the tank, go in through the sending unit hole. You may be able to inspect some suspect problems there too.
__________________
 '75 Cuddy with '00 Johnson Ocean Pro 150 horse Benny
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#3
07-22-2015, 12:04 PM
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And there are any number of scenarios that can play out, depending on your situation.
You could just pump it out through the fuel line with the fuel pump. Add another 5 gallons of fresh fuel and pump it out again but monitor this fuel for excessive water/trash say with a clear container. Install a water separator/filter and let it go at that. Changing the filter after using one tank. All along checking for possible fuel leaks/smells in the bilge and other locations.
__________________
'75 Cuddy with '00 Johnson Ocean Pro 150 horse Benny
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#5
07-22-2015, 12:26 PM
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Also there is usually a screen/filter in or at the tank..
It may be located in the tank at the beginning of the pickup tube or beneath/inside the fitting at the top of the tank above the pickup tube. If you do not get good fuel flow, may need to check and clean it.
__________________
'75 Cuddy with '00 Johnson Ocean Pro 150 horse Benny
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#6
07-22-2015, 04:36 PM
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Well more of a diesel boat fan but deep purple is good too...
Welcome!
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#7
07-23-2015, 10:59 AM
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mawshj
with boat on trailer I connected a hose to the output of squeeze ball and went to 5 gal buckets on ground . water should (siphon) come out first then switch to another bucket (s) for remaining gas. throw away first bucket the rest should be ok for water separator to collect.
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#8
07-23-2015, 12:26 PM
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The water will hide in the lowest corner of the tank
ALSO if there was any ethanol in the gas the water will have pulled it out of the gas leaving you with very low octane.... I suggest removing everything from the tank and having a bonfire.
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#9
07-23-2015, 07:02 PM
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What i did with mine i disconnected the fuel line going in the engine at the fuel pump, i have a 2006 mercury and placed it into a 5 gal bucket. Then i disconnected the fuel vent line and with a compressor i blew air in to it and the fuel started flowing into the bucket.
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#10
07-23-2015, 08:29 PM
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Quote:
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