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Author Topic: gas?  (Read 307 times)

June 11, 2013, 10:28:00 AM
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ken s

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gas?
« on: June 11, 2013, 10:28:00 AM »
while my 90 Johnson (17.5AQS) is in the shop for a stalling problem...new $500 fuel pump.   I was wondering.   I use it 100 hours a year...I fill it to the brim every time I use it to avoid condensaton.  I have a large fuel water filter installed and will change that too.  
    Should I empty the gas tank?   I use the blue enzime stuff without fail. the tank was full all winter.
      Do you leave the tank full or empty   I've heard both...Ken

June 11, 2013, 11:14:29 AM
Reply #1

wingtime

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Re: gas?
« Reply #1 on: June 11, 2013, 11:14:29 AM »
Leaving it full of fuel reduces the airspace in the tank helping minimize the absorption of water.  Leaving the tank empty increases the airspace and the chances of condensation to build up in the tank.  So unless you drain that before you fill the tank back up.... you'll still have water in the fuel.   I assume your using ethanol fuel.  Even with a stabilizer it will separate... also the ethanol itself is a very strong solvent that will attack your fuel lines, fuel pump diaphragms etc.  The best solution is to run non ethanol fuel if you can find it locally.  go to Pure-gas.org to find a source near you.
1998 Explorer w/ Etec 250


1987 170 w/ Evinrude 90

 


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