Mercury I-6 115hp Fuel Filter Question

arsenalpsu

Petty Officer 1st Class
Joined
Dec 1, 2008
Messages
290
I have a 115HP 1984 I-6 "tower of power" Mercury. For this 2 stroke 50:1 fuel mix, should I add a water separating fuel filter? I do not have one now but use "stab-fuel" after ever fill up. Should I add one to my system?

If I should add one I have a few questions:
1. I see a reasonably priced one at Wall-Mart that says "Replaces Mercury 35
60494A4", will this work?
2. Do I need to remove and dump the filter before each ride, then just
replace each season?
3. Should I still use the Stab-fuel or just at the end of the season to keep
the leftover fuel fresh?
4. Will adding one cause any other possible problems?
5. Any other tips or suggestions?

THANK YOU!
Jon
 

Yepblaze

Lieutenant Commander
Joined
Jun 1, 2001
Messages
1,686
Re: Mercury I-6 115hp Fuel Filter Question

I've never used one and had 1000's of hours without issue.

If you keep your fuel system free of water and crud there should be no need.

Installed incorrectly, or with the slightest air leak, it will create more problems than you could imagine.
 

arsenalpsu

Petty Officer 1st Class
Joined
Dec 1, 2008
Messages
290
Re: Mercury I-6 115hp Fuel Filter Question

As i have an inboard fuel tank and to not have access, how do i make sure there is "no water or crud" in it?
 

arsenalpsu

Petty Officer 1st Class
Joined
Dec 1, 2008
Messages
290
Re: Mercury I-6 115hp Fuel Filter Question

Anyone else have thoughts on this, a local mechanic said he would highly recommend one but I would like some more opinions please......
 

Chris1956

Supreme Mariner
Joined
Mar 25, 2004
Messages
28,074
Re: Mercury I-6 115hp Fuel Filter Question

I would recommend a water seperator. Any universao outbaord one will work fine. Use 3/8" fuel lines.

If your inboard tank has a fuel gauge, you can get access to the bottom of the tank via the sender. Lift the bow of the boat up to let the water and crud settle to the back bottom. Use a siphon hose to suck out 12 gal of fuel. Now let that settle, and siphon the bottom of the fuel into a clear container to see if you have water and/or dirt. Dump the good fuel back in.

Stabil may be used over the winter.
 
Top