? on fuel water seperators

Rbsgfd578

Petty Officer 3rd Class
Joined
Aug 20, 2005
Messages
82
I hope I posted this in the right section. One quick question is the a certain type fuel water seperator for each type motor(like 1 For Merc,1 For Johnson) or are they pretty much interchangeable.Reason im asking is Napa has 1 for like $24.00, but in the description it says it is a replacement unit for like Mercury and give a part #..<br /> I have a 1984 Johnson V-4 90hp<br />Thank you in advance.
 

muskrat

Chief Petty Officer
Joined
Apr 13, 2004
Messages
445
Re: ? on fuel water seperators

racor make a great fuel filter with a drainable bottom..
 

dajohnson53

Lieutenant Commander
Joined
Apr 28, 2004
Messages
1,627
Re: ? on fuel water seperators

You can get a racor set up from any local or mail order boat parts dealer. Make sure the fuel flow is adequate for your engine. The "rule of thumb" is that an outboard will suck 10% of its horsepower in gallons per hour at full throttle - e.g. your 90 hp would max out at 9 gph. I'd exceed that number. If you can't find one locally, check here at the Iboats mega mall or do a web search for racor. Plastic drain bowls for open air installations, metal bowls or non-drainable for enclosed installations.<br /><br />I believe the only specs you need to pay attention to for water sep. filters are: hose diameter size and fuel flow. Make sure each is correct for your engine and it doesn't matter which brand.<br /><br />I've been using a drainable type filter for several years after having used a plain cannister type for sereral years. I really like the drainable one - if you drain it regularly, you'll never be blind-sided by a filter failure. I change the cannister once per year, but that probably isn't necessary since I drain it whenever there's even an ounce of water in the clear bowl.
 
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