I recently purchased my first Fuel Injected outboard ,(115 Mercury) all my other boats have always been carb engines.
I know from experience with diesel pickup trucks that water in fuel can cause many dollars worth of damage to electronic diesel engines
Would it be wise to add a water seperator on my engine and if so how is it done.I'm assuming my fuel pump is in the tank on my boat so fuel pressure would be a lot higher on the line and simply splicing the seperator in line wouldn't work
Water seperator
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Water seperator
2019 Tracker 22 DlX sportfish
115 Mercury Command thrust
A Day hemmed in prayer seldom comes unraveled .
115 Mercury Command thrust
A Day hemmed in prayer seldom comes unraveled .
Re: Water seperator
Fuel pump is on the engine. It should be as simple as splicing it in and mounting it upright. I like the Racor fuel water separator with the clear bowl. It lets you see if there is any water in the bottom of it and drain it out if needed.Kytim wrote: ↑Sun Feb 23, 2020 6:50 pmI recently purchased my first Fuel Injected outboard ,(115 Mercury) all my other boats have always been carb engines.
I know from experience with diesel pickup trucks that water in fuel can cause many dollars worth of damage to electronic diesel engines
Would it be wise to add a water seperator on my engine and if so how is it done.I'm assuming my fuel pump is in the tank on my boat so fuel pressure would be a lot higher on the line and simply splicing the seperator in line wouldn't work
Re: Water seperator
I don't know how to tell you how to add it to your rig, but I think it's a good idea to add the water separator...
Roland & Jo
2010 Bennington 20 Sfi
Yamaha 75 4 Stroke
Shreveport, Louisiana
2010 Bennington 20 Sfi
Yamaha 75 4 Stroke
Shreveport, Louisiana
Re: Water seperator
FWIW, I wanted my dealer to add one to my merc 200 and they said no need to??? Said that my engine had a fuel water separator on it?? mine is a 2018
Sounds crazy to me but......so far no issues.
Sounds crazy to me but......so far no issues.
I am the guy at the boat ramp that gives you dirty looks when you are a complete idiot and too stupid to know it.
Re: Water seperator
My old Yamaha 115 4-stroke is injected. It has a clear bowl factory mounted fuel filter/water separator under the engine cowling AND a large inline unit - same size and shape as an automotive oil filter on a V8. The large size provides more surface area to keep the pressure drop to a minimum. I have never seen water or fouling in the clear factory filter. I am a big believer in having an additional filter/separator in series. Mine is mounted at the stern where my 12-gallon portable tanks are. The motor mounted fuel pump easily sucks gas from the tanks, through the filters. Keep in mind that you are only talking about 10-11 gallons per HOUR running wide open with 115 HP. So 10 gallons/60 minutes = 0.17 gallons per minute. So about 22 ounces per minute - you could run a skinny siphon hose faster than that
Buy a screw-on filter kit that is rated for 10 microns or better in order to remove even the smallest particulates, along with the water separator action.
Marc
Buy a screw-on filter kit that is rated for 10 microns or better in order to remove even the smallest particulates, along with the water separator action.
Marc
Big and ugly but we love our 1999/2000 Crest II DL with a Yamaha F115
Re: Water seperator
I'd take down the model number, VIN, build date, etc and send a message to Mercury. Chances are it has a water separator under the cowl already like Honda and others. I believe some outboards are built with one factory installed at the engine and some are built to have one added externally. What you can run into if it's got one already and not built for an add on is the add on becomes a restriction. Fuel pumps are better at pushing than pulling and putting anything inline before the pump can lead to issues if not designed for it.
https://www.youtube.com/watch?v=YniVqyJtIrA
Also FWIW I go ahead and run Stabil 360 in every tank of gas even though I run 90 octane E0....it only adds about 7 cents a gallon.
My Honda 90 had a serviceable separator under the cowl, my Yamaha F200 (on a G3 by Yamaha boat) has the big external one.
https://www.youtube.com/watch?v=YniVqyJtIrA
Also FWIW I go ahead and run Stabil 360 in every tank of gas even though I run 90 octane E0....it only adds about 7 cents a gallon.
My Honda 90 had a serviceable separator under the cowl, my Yamaha F200 (on a G3 by Yamaha boat) has the big external one.
2019 G3 SunCatcher V322 SS tritoon, Yamaha F200
2019 F-150 XLT SuperCrew FX4, 3.5L EcoBoost Max Trailer Tow Package
2019 F-150 XLT SuperCrew FX4, 3.5L EcoBoost Max Trailer Tow Package
Re: Water seperator
2015 Lowe SS 210 RFL XL Package 150 HP Merc
"The Nina" or "The Bismarck" my buddy's call it!
2011 Tundra
"The Nina" or "The Bismarck" my buddy's call it!
2011 Tundra