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 Do you need... 
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MMT Pro Member

Joined: Thu Jan 28, 2016 8:35 pm
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Post Do you need...
A water separator and a fuel filter?

I'm moving a line and adding a water separator and was wondering.


Your thoughts?


Fri Mar 09, 2018 11:14 pm
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Location: West Coast Wisconsin
Post Re: Do you need...
Some say you need them, but I have never ran one or needed one. Good fuel is the main thing imo.


Sat Mar 10, 2018 6:18 am
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Post Re: Do you need...
Is this overkill then? :lol:




Sat Mar 10, 2018 7:41 am
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Post Re: Do you need...


Sat Mar 10, 2018 8:42 am
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Post Re: Do you need...
Probably not. It is just a lawn mower motor. Have you ever seen any more than a plastic inline filter on a lawnmower?

With that said, if you ever get contaminated fuel, a good Racor filter, or something similar, can't hurt.

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Sat Mar 10, 2018 11:28 am
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Post Re: Do you need...
Aluminum tank = yes to Racor water separator. Otherwise, no.


Sat Mar 10, 2018 1:43 pm
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Post Re: Do you need...
I been runn ing a 13 gal alum tank in da front of my skiff since before most of u people been alive. can't hurt, but I don't run a water separator. it's just another thing to hinder fuel flow, especially if u have a vacume fuel pump.


Tue Mar 13, 2018 9:12 pm
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Post Re: Do you need...
Aluminum tanks sweat when temps change rapidly. Keep it full and you'll more than likely be fine. I never had an issue with plastic tanks. But if there is minimal airspace for condensation then you will be ok.

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Wed Mar 14, 2018 8:49 am
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Post Re: Do you need...
Take it for what its worth but yes I will always run one. I have plastic tanks and this year I filled up at a gas station got to the water and unloaded and boat ran like chit. checked everything and had a 1/8 of a tank of water in both of my tanks. Now the gas statio
n argued with me that it happened in my boat but I figure it was in there system.

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Wed Mar 14, 2018 12:38 pm
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Post Re: Do you need...
Tanks sweat when the relative humidity in the airspace of the tank reaches 100%. This happens when the temp of that air drops. Though it will happen slightly faster in an aluminum tank (since aluminum is a better conductor of heat than plastic), you will get exactly the same amount of sweat in both a plastic and a metal tank once they reach the same temp (again, it's just that aluminum will get there SLIGHTLY faster than plastic).

Leave any 1/2 filled plastic bottle of pop, water in a car over night with the cap on and you'll see how much they sweat with changes in the temp of the air inside the bottle

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Sun Mar 18, 2018 10:48 am
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Location: Muscatine, Iowa
Post Re: Do you need...
If you are running a new EFI motor I would run a water separator type filter. Water in fuel injector pump will shorten its life and cut channels in the injectors. Might save you an expensive repair.


Mon Mar 19, 2018 9:05 am
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