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leaking fuel water seperator?

Old 06-16-2018, 01:12 PM
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Default leaking fuel water seperator?

I have a 2008 proline 23 sport cc with 500 hours that i bought 13 months ago. The boat has only been used a handful of times since purchased. I noticed a gas smell when opening the back hatch. I unscrewed the round cover on the floor in front of the driver's seat to access the fuel tank. Didnít notice a problem or a strong fuel smell there. Iím guessing the fuel water separator leaking in the back is the problem. Here are some pics.

Iíve ordered a replacement filter and have started cleaning everything in the back hatch and will use bilge cleaner too. Do you agree that a leaking fuel water separator was likely the problem? How should I clean the part that the filter screws onto? It looks pretty nasty. When the fuel filter gasket dried you can see in the pic that there is some sort of buildup. I certainly will be replacing the fuel water seperator much more frequently in the future. Anything else I should be checking or any other advice? Thanks




Old 06-16-2018, 01:59 PM
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You should replace the bracket and install new fittings before installing a new water separator. That certainly could be your problem (most likely). There seems to be a lot of corrosion so I would go with a stainless steel bracket. Not a hard job but well worth the investment.
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Old 06-16-2018, 02:04 PM
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first thing you should've done before using the boat was replace the filter, you would've seen this sooner

assuming you don't know if any fuel lines have been replaced, its time to replace the bulb, all fuel lines from the tank to the motor, the fuel water separator assembly, and obviously the filter

i think you should pause your boating and get to know your boat better before using it. open all hatches and port holes and understand what equipment is on your boat and do any maintenance that is overdue or there is no record of it being done.

Last edited by mystery; 06-16-2018 at 03:25 PM.
Old 06-16-2018, 03:02 PM
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For the love of God replace the entire housing and filter. Are you even being serious?

that filter should be replaced yearly and it looks about 10 years past due. Housing is about ready to fall off too.

only you can tell if the source of the leak is that but judging by the pictures the whole fuel system is suspect from serious neglect.
Old 06-16-2018, 03:08 PM
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You need to replace the entire unit, not clean it. Replace the fittings and cut back the hoses a bit with new clamps. That things done
Old 06-16-2018, 06:20 PM
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New fuel lines from the tank to the filter and from the filter to the engine should be marked USCG approved
Old 06-16-2018, 06:35 PM
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Definitely replace that assembly. Because of the condition and where it is located, I would recommend you pony up and buy a stainless head. They are more expensive of course but worth it.
Old 06-17-2018, 05:23 AM
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It looks like there is a steel plug in the unused port on the filter head, and can't tell what the elbow is made of , the green might mean bronze, but all that should be replaced too. You can get a Racor with a clear bowl, filter, and head for around $100.
Old 06-17-2018, 06:50 AM
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While your changing all fuel hoses,fittings, clamps, and filter , clean the bilge with cleaner and write the date on the new filter with marker.
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Old 06-17-2018, 07:51 AM
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Originally Posted by pdabill View Post
I have a 2008 proline 23 sport cc with 500 hours that i bought 13 months ago. The boat has only been used a handful of times since purchased. I noticed a gas smell when opening the back hatch. I unscrewed the round cover on the floor in front of the driver's seat to access the fuel tank. Didnít notice a problem or a strong fuel smell there. Iím guessing the fuel water separator leaking in the back is the problem. Here are some pics.

Iíve ordered a replacement filter and have started cleaning everything in the back hatch and will use bilge cleaner too. Do you agree that a leaking fuel water separator was likely the problem? How should I clean the part that the filter screws onto? It looks pretty nasty. When the fuel filter gasket dried you can see in the pic that there is some sort of buildup. I certainly will be replacing the fuel water seperator much more frequently in the future. Anything else I should be checking or any other advice? Thanks




Say Serious!
Old 06-17-2018, 07:53 AM
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That right there is a RED flag as to P/O general neglect of the boat.
Old 06-17-2018, 08:42 AM
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Yep 'deferred maintenance' at its worst. I use those same filters and usually change them once a year and they usually have no rust on them. As bad as the housing looks make sure salt water isn't leaking in from somewhere. Get an all stainless one and you can use the Sierra filters but just change them yearly. Check the stainless steel hose clamps on ALL your fuel lines.
Old 06-17-2018, 03:38 PM
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Got a new sierra stainless assembly and switched from 18-7845 to 18-7945 (21 micron to 10 micron from what I understand). Got new brass fittings and installed with permatex thread sealant applied. New stainless clamps too. No new fuel lines yet but problem appears to be solved. Thanks for the advice.
Old 06-17-2018, 04:04 PM
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Looks good!
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Old 06-17-2018, 04:47 PM
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Very nice , good job!
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