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Old 02-02-2007, 07:15 AM
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Default fuel water separator

I have a 225 4 strokes mercury/Yamaha engine, it has a fuel filter under the cowling,
I was wondering if it's a good idea to add a fuel/water separator?

Has anyone done this, or is the engine filter good enough?
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Old 02-02-2007, 08:40 AM
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Default Re: fuel water separator

Yes, yes, and yes, I cant beleive the dealer didnt put one on when you got the boat.
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Old 02-02-2007, 08:42 AM
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Default Re: fuel water separator

he said the fuel filter in the engine is good enough
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Old 02-02-2007, 08:46 AM
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Default Re: fuel water separator

He was 100% incorrect

With a Four Stroke especially they hate water! -

I have Suz'k 140's and of .12 Oz gets past the seperator it fouls out the fuel filter

The seperators will definalty help ----

Some may disagree but if you are offshore and have water in the tank This may save your fuel filter

Also
I swear by this .......... Add the Product "Sea Foam" to each fill up. this eats up the condensation in the tank, and if you do get water it will stick it into the seperator

Best 2.00 bucks a can I can spend

aj
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Old 02-02-2007, 08:50 AM
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Default Re: fuel water separator

here is mercury's stance on this:

it is not a prbblem in putting one on if the fuel vacumn that you pull thru the line after the seperator is installed is within spec as per the shop manual.....

it also states that a add'l water sep is recommended if ethanol is present - on page 37 of the Verado owner's manual..

What merc has a problem with, is if it is incorrectly installed and puts drag on the system, if it causes problems with the fuel deelivery, that will void your warranty.
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Old 02-02-2007, 10:25 AM
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Default Re: fuel water separator

I agree on the Sea Foam but where are you getting it for $2 a can? I'm paying $6.
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Old 02-02-2007, 11:44 AM
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Default RE: fuel water separator

I highly recommend adding one also. One per motor actually if you have multiple engines. Minor condensation can cause big problems with the motor. I have always had one on my boat. Chnage the filter out per the motor manufacturer interval. I change my Yamaha 10 micron every 200 hrs., which usually is every 9-10 months.
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Old 02-02-2007, 11:46 AM
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Default Re: fuel water separator

I and a few other verado owner's with slight water in fuel have had great results with MDR "Water Zorb".....
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Old 02-02-2007, 12:44 PM
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Default Re: fuel water separator

Quote:
Glen E - 2/2/2007 8:50 AM

here is mercury's stance on this:

it is not a prbblem in putting one on if the fuel vacumn that you pull thru the line after the seperator is installed is within spec as per the shop manual.....

it also states that a add'l water sep is recommended if ethanol is present - on page 37 of the Verado owner's manual..

What merc has a problem with, is if it is incorrectly installed and puts drag on the system, if it causes problems with the fuel deelivery, that will void your warranty.
I am glad to see that Merc has modified their stance on this matter. When I talked to them last year they absolutely, positively were trying to talk me out of having a boat mounted filter. Said I did not need it and it could cause me problems.

It is interesting to note that Yamaha's position is that a boat mounted external filter is an absolutely, positively great thing to have. They even market one under their brand name. If you buy their PowerMatched system, an external filter comes as part of the package.

So, since you have a Mercury/Yamaha motor you get to pick and choose whatever you want to do. I vote on having the filter. But, as Yam, Merc and Bombardier all say, make sure that the total fuel system from the tank to the mechanical lift pump inlet is within specs with it comes to restrictions. This should be the case whether or not a boat mounted filter is installed.
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Old 02-02-2007, 01:21 PM
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Default Re: fuel water separator

Quote:
Glen E - 2/2/2007 11:46 AM I and a few other verado owner's with slight water in fuel have had great results with MDR "Water Zorb".....
I have heard and read great things about this product and definitely plan on using it upon Spring commissioning...

Dave
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Old 02-02-2007, 02:15 PM
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Default Re: fuel water separator

If your dealing with ethanol gas use the E-Zorb instead
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