Fuel Filter

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  • Michael TMichael T Member Posts: 7,227 ✭✭✭✭✭
    @aero3113, the spin on one is probably a common type of water separating fuel filter that Mercruiser used back then.
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  • aero3113aero3113 Member Posts: 9,045 ✭✭✭✭✭
    Yes, it is. I'm just wondering if there is any other filters/screens I'm missing that should be cleaned or changed.
    2008 330EC
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  • Michael TMichael T Member Posts: 7,227 ✭✭✭✭✭

    @aero3313, I'll look at my old service notes for my 350s from the 2000s. I don't remember having to take apart the fuel pump to service a filter like in the new cool fuel modules which have two filters in them. I have seen plenty of add on filters that were done by owners but not o.e.m.

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  • aero3113aero3113 Member Posts: 9,045 ✭✭✭✭✭
    Ok, thanks MT. (I dont see any add on's)
    2008 330EC
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  • rasburyrasbury Member Posts: 8,410 ✭✭✭✭✭
    Mine is an 04 or an 05...
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  • rasburyrasbury Member Posts: 8,410 ✭✭✭✭✭
    it's an 05....
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  • luckydogluckydog Member Posts: 316 ✭✭✭

    I was told that fuel water separator was not good for the engines that it restricted the fuel flow, Is that BS or Not I never looked more in to it.

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  • Michael TMichael T Member Posts: 7,227 ✭✭✭✭✭
    Unless you let the FW separator get clogged it is, in my opinion, BS. I had them on several engines and they ran well and fast. Mind you I often heard from techs that you can "go a couple of years" without changing them, which, imo, is also BS. I changed mine FWS every year and looked at them from time to time to see if there was any junk in them - but I have never run that ethanol cr*p in my engines. Maybe the FW separators have fallen out of favor with the more recent wide use of ethanol?
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  • raybo3raybo3 Administrator Posts: 5,503 admin
    We have no choice but to use ethanol here. I have never had a ethanol problem with my boat (knock on wood).....
    2002 342 Fiesta Vee PC Point Of Pines YC Revere MA. popyc.org     raybo3@live.com
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  • luckydogluckydog Member Posts: 316 ✭✭✭

    I only use 90 rec ethanol free the same fuel the marina use I have at our shop for equipment

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  • rasburyrasbury Member Posts: 8,410 ✭✭✭✭✭
    Ok, boat is home so had a look to confirm what I already posted. My 05 does not have the newer cool fuel setup. I can feel a line go over to perhaps under the power steering pump and then to points unknown. Guess until I have to deal with it I won't dig further. I guess at this point I want to confirm if I can there are no fuel filters buried under there and it looks like the one in line filter is all I have to deal with. That filter so far looks like 60 bucks or so, it must be an HD filter and will replace it.
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  • Robs_232Robs_232 Member Posts: 212 ✭✭✭

    Ras,

    It looks and sounds like yours is like my 2004. Inline filter and the fuel/water separator filter is it.

    Rob

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  • Robs_232Robs_232 Member Posts: 212 ✭✭✭

    Al,


    Which brand filter and number do you recommend that is 10 micron? I have tried to find the micron ratings on the various brands of inline filters, but have found it hard to find that info.

    Rob

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  • Michael TMichael T Member Posts: 7,227 ✭✭✭✭✭
    edited December 2015

    Ras from looking at the picture you posted earlier it looks like your in-line fuel filter has the 3/8" hoses and is attached to the top edge of a stringer?

    If it were my boat I might consider adding a small bracket to the stringer and installing a spin-off fuel/water separator kit.

    Sierra makes 10 micron fuel/water separator kits in aluminum and SS with both 1/4" and 3/8" hose fittings. For example the 3/8" SS kit is about $80 and includes both the bracket and fuel/water separator ( filter) pn 18-7945, (Mercury long style maxi-pleat). This might be worth investigating?

    Sierra KIT SS  3/8"  pn 18-7985-1

    Sierra KIT SS 1/4"  pn 18-7984-1

    Sierra KIT ALU 3/8"  pn 18-7986-1

    Sierra KIT ALU 1/4"  pn 18-187982-1

    Of course, as Al said, Sierra makes a bunch of replacement cartridges and disposable in-line fuel filters. They have charts to match your specifics or any local marine shop should be able to tell you exactly what you need - if you need it before Al is done sledding - around May 2016?  LOL

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  • rasburyrasbury Member Posts: 8,410 ✭✭✭✭✭
    Yep to Rob, and Michael, it is mounted to a stringer. I also have a spin on fuel water seperator nearer to the fuel pump. Thanks all, just have a different system than most I guess!
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  • Michael TMichael T Member Posts: 7,227 ✭✭✭✭✭
    Well Ras if you have the fuel/water with the pleated filter that will get rid of a lot/most of unwanted water/debris in the fuel line. I guess that second filter is just extra insurance. I can't tell from the picture but it looks disposable as in disconnect, pitch and replace?. If so, Sierra does make replaceable in line filters of different micron ratings. I think we talked about this on the forum before and decided to be careful to not restrict the fuel flow for a whole bunch of reasons. 10 micron seems to be a common  size and that's what Al recommended! I know in my 8.2 mags there are two filters in the cool fuel module. A small circular pre-filter and a larger secondary pleated filter. I had 90 hours on the engines and about 12months of use. I was told no need to replace. I insisted and there sure was a need.....even though I only use 3 fuel suppliers, run 91 octane (non-ethanol) and don't fill-up after they have just received a gas shipment - my filters still definitely  needed replacement. Cheap insurance, IMO!
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  • rasburyrasbury Member Posts: 8,410 ✭✭✭✭✭
    I agree- it and the fuel water separator will be replaced in short order!
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  • rasburyrasbury Member Posts: 8,410 ✭✭✭✭✭
    Marine max had both filters so this is done on to the Genny.
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