Price: $8.95
Discontinued
Save: $3.04
(25% Off $11.99)
Part # 18-7844
(Discontinued)
Price: $8.95
Discontinued
Save: $3.04
(25% Off $11.99)
Part # 18-7845
(Discontinued)
Price: $22.95
Discontinued
Save: $6.64
(22% Off $29.59)
Part # 18-7967
(Discontinued)
Price: $18.95
Discontinued
Save: $5.24
(21% Off $24.19)
Part # 18-7968
(Discontinued)
Price: $7.99
Discontinued
Save: $0.62
(7% Off $8.61)
Part # 9-37801
(Discontinued)
Price: $18.99
Discontinued
Save: $4.91
(20% Off $23.90)
Part # 9-37805
No Reviews
(Discontinued)
Price: $17.99
Discontinued
Save: $2.85
(13% Off $20.84)
Part # 9-37806
(Discontinued)
Fuel Water Separator Filter with Bonus Pack - Sierra
Price: $43.95
Discontinued
Save: $18.34
(29% Off $62.29)
Part # 18-7982-2
(Discontinued)
Fuel Water Separator Filter with Bonus Pack - Sierra
Price: $40.95
Discontinued
Save: $13.24
(24% Off $54.19)
Part # 18-7983-2
(Discontinued)
Price: $44.95
Discontinued
Save: $12.24
(21% Off $57.19)
Part # 18-7775
No Reviews
(Discontinued)
Price: $76.95
Discontinued
Save: $13.84
(15% Off $90.79)
Part # 18-7776
No Reviews
(Discontinued)
Price: $92.95
Discontinued
Save: $12.24
(11% Off $105.19)
Part # 18-7777
No Reviews
(Discontinued)
Price: $29.95
Discontinued
Save: $6.64
(18% Off $36.59)
Part # 18-7853-1
No Reviews
(Discontinued)
Price: $44.95
Discontinued
Save: $15.94
(26% Off $60.89)
Part # 18-7775-1
No Reviews
(Discontinued)
Price: $88.95
Discontinued
Save: $23.34
(20% Off $112.29)
Part # 18-7776-1
No Reviews
(Discontinued)
Price: $81.95
Discontinued
Save: $26.74
(24% Off $108.69)
Part # 18-7777-1
No Reviews
(Discontinued)
Price: $38.95
Discontinued
Save: $15.14
(27% Off $54.09)
Part # 18-7848-1
(Discontinued)
Fuel Water Separator Bonus Kit - Sierra
Price: $43.95
Discontinued
Save: $13.64
(23% Off $57.59)
Part # 18-7848-2
No Reviews
(Discontinued)
Price: $37.95
Discontinued
Save: $9.04
(19% Off $46.99)
Part # 18-7852-1
(Discontinued)
Price: $40.95
Discontinued
Save: $18.54
(31% Off $59.49)
Part # 18-7852-2
No Reviews
(Discontinued)
Price: $80.99
Discontinued
Save: $13.67
(14% Off $94.66)
Part # 9-37855
No Reviews
(Discontinued)
Price: $39.95
Discontinued
Save: $6.43
(13% Off $46.38)
Part # 9-37852
No Reviews
(Discontinued)
Mallory Filter, Fuel Water Seperator Kit 9-37851
Price: $30.99
Discontinued
Save: $8.17
(20% Off $39.16)
Part # 9-37851
(Discontinued)
Price: $33.95
Discontinued
Save: $5.06
(12% Off $39.01)
Part # 9-37850
No Reviews
(Discontinued)
Price: $38.95
Discontinued
Save: $11.84
(23% Off $50.79)
Part # 18-7982-1
No Reviews
(Discontinued)
Fuel Water Separator Kit - Sierra
Price: $36.95
Discontinued
Save: $7.74
(17% Off $44.69)
Part # 18-7983-1
No Reviews
(Discontinued)
Price: $79.95
Discontinued
Save: $25.94
(24% Off $105.89)
Part # 18-7984-1
No Reviews
(Discontinued)
Fuel Water Separator Kit - Sierra
Price: $100.95
Discontinued
Save: $23.94
(19% Off $124.89)
Part # 18-7985-1
No Reviews
(Discontinued)
Fuel Water Separator Kit - Sierra
View Larger Photo
representative picture only
Price: $45.95
Discontinued
Save: $10.94
(19% Off $56.89)
Part # 18-7986-1
(Discontinued)
Price: $40.95
Discontinued
Save: $6.29
(13% Off $47.24)
Part # 9-37854
(Discontinued)
Price: $30.66
Discontinued
Save: $5.93
(16% Off $36.59)
Part # 9-37857
No Reviews
(Discontinued)
Price: $24.71
Discontinued
Save: $5.27
(17% Off $29.98)
Part # 9-37864
No Reviews
(Discontinued)
Price: $1.95
Discontinued
Save: $0.44
(18% Off $2.39)
Part # 18-4256
No Reviews
(Discontinued)
Price: $19.99
Discontinued
Save: $4.76
(19% Off $24.75)
Part # 9-37811
No Reviews
(Discontinued)
Price: $10.95
Discontinued
Save: $5.24
(32% Off $16.19)
Part # 18-7846
(Discontinued)
Price: $8.99
Discontinued
Save: $1.82
(16% Off $10.81)
Part # 9-37803
(Discontinued)
Price: $9.95
Discontinued
Save: $2.04
(17% Off $11.99)
Part # 18-7945C
No Reviews
(Discontinued)
Price: $11.95
Save: $4.47
(27% Off $16.42)
Part # 35-16248
No Reviews
Sierra
Fuel Water Separator Kits for Mercury
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Based On 7 Reviews | Write Review
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Sierra 18-7844 - Fuel Water Separator Filter
by Kirk from Bellingham, Washington on October 30, 2016
I buy them every year because they work as advertised.
(1 of 2 people found this review helpful)
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Always good
by Dave from London, Ontario on July 18, 2016
Have been using Sierra filters for years. Great product at a reasonable price
(1 of 2 people found this review helpful)
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Fuel water separator
by Paul from Carmichael, California on May 09, 2016
This was the right fit it worked perfect the price was great .
(1 of 2 people found this review helpful)
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LOOKS GOOD
by JOE from Ludington, Michigan on February 18, 2015
GOOD
(1 of 3 people found this review helpful)
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good
by Daniel from Central Square, New York on September 29, 2014
good
(1 of 3 people found this review helpful)
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Sierra Fuel/Water Separator
by Andrew from Rogers, Ohio on May 01, 2012
With gasoline now contaning 10% ethanol, removing water from the fuel is important. Ethanol attracts moisture from the air, and moisture in the engine is bad news. I've used Sierra fuel/water separators for years, and never had any such related problems with water. They should be changed yearly, more frequently if you run more than the average.
(15 of 17 people found this review helpful)
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Review for Sierra 18-7844 Fuel Water Separator Filter
by a Customer on March 20, 2009
(6 of 20 people found this review helpful)
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Based On 12 Reviews | Write Review
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Fuel Water Separator filter
by Trevor from Otonabee, Ontario on June 25, 2017
Product was correct and shipped in a timely fashion. Very satisfied with the service.
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filter
by Howard from Westport, Massachusetts on March 02, 2017
always happy with sierra quality
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Great product.
by Steven from Blountstown, Florida on November 29, 2016
Easily installed.
(1 of 2 people found this review helpful)
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Absolute must for all marine engines
by Rene from Wilsonville, Oregon on August 08, 2016
Works great, no fuel issues since I began using these.
(1 of 2 people found this review helpful)
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Fuel Water Seperator
by James from Chesapeake, Virginia on July 25, 2016
Very pleased. Fast shipping.
(1 of 2 people found this review helpful)
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Sierra 18-7845 filter
by Thomas from Bemidji, Minnesota on June 18, 2016
Iboats had the best online price for this filter. They also have shipping rates that are lower than most other online retailers of boating accessories. Great company to deal with.
(1 of 2 people found this review helpful)
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A+
by Gene from Trempealeau, Wisconsin on July 15, 2015
Fits and works great
(1 of 2 people found this review helpful)
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Fits my factory Mercruiser fuel filter header
by Jim from Tolono, Illinois on September 15, 2013
Nothing else to say. Fits. Seems to work. Cheap.
(1 of 2 people found this review helpful)
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good product
by Peter from Flushing, New York on June 15, 2013
satisfied
(1 of 3 people found this review helpful)
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21 Micron filter
by Emmett from Pearland, Texas on April 26, 2013
This is labeled as a replacement for the Mercury 35-802893Q, but when received the specs reflect it is a 21 Micron filter! NOT the 10 Micron filer I need. I had looked for the specs on-line before ordering and they were not listed. The 10 Micron P/N is 18-7945 according to the West Marine website.
(2 of 6 people found this review helpful)
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water filter
by James from Texas City, Texas on April 16, 2012
i have always had a great experience dealing with i-boats and have always gotten quality products for a low price and these water filters for my boat are no exception. great filter for a great price !!!!
(3 of 9 people found this review helpful)
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Filters
by Giuseppe from Hillsborough, New Jersey on August 15, 2011
Great service
(2 of 8 people found this review helpful)
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Average Customer Review for Sierra 18-7967 Fuel Filter
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Based On 1 Review | Write Review
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quick great service good product
by Daniel from Holdenville, Oklahoma on April 07, 2014
Unfortunately i ordered the wrong product and their customer service was helpful with returns.
(1 of 2 people found this review helpful)
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Average Customer Review for Sierra 18-7968 Fuel Filter
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Fuel Filter.
by Dirk from Cinnaminson, New Jersey on May 09, 2016
Quality as good as OEM.
(2 of 3 people found this review helpful)
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Based On 4 Reviews | Write Review
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Works as expected, every time
by Charles from Bethesda, Maryland on December 07, 2017
Wouldn't use any other separating filter.
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Great product
by Charles from Bethesda, Maryland on November 08, 2017
Worked as expected. Don't forget to fill the filter with fuel if you don't have a "primer" bulb... before installation
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Exact replacement. Fast shipping.
by Charles from Bethesda, Maryland on May 04, 2017
Product works as advertised.
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Good Price
by Raymond from Belvidere, New Jersey on May 27, 2011
it is what I odered but have not used it yet
(2 of 8 people found this review helpful)
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Average Customer Review for Mallory 9-37806 Fuel Filter
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Based On 2 Reviews | Write Review
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Good buy
by Allen from Gig Harbor, Washington on March 01, 2015
Looked for a new replacement filter for my Merc, and found this one. Exact fit, and so far works great. Will be buying this one each year.
(1 of 1 people found this review helpful)
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great
by a Customer from Biloxi, Mississippi on February 25, 2013
worked great and got it right on time
(1 of 2 people found this review helpful)
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Based On 1 Review | Write Review
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Filter kit with Housing
by Michael from Prattville, Alabama on June 13, 2011
Bought this for use on my small boat, because they worked so well on my big boat. Easy to install, uses the same 10 micron filter. Just got it in last week, so I look forward to seeing if they work just as well. Got a filter kit with two filters for less than I could get just the housing locally.
(2 of 2 people found this review helpful)
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joeboat
by Harlan from Camp Wood, Texas on August 13, 2014
just what I needed and arrived here quickly , plus extra filter, no more looking for one replacement time. very well built
(2 of 2 people found this review helpful)
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Fuel water separator
by Ricardo from Jacksonville, North Carolina on September 06, 2017
Bought this for my 04 yamaha 90 hp outboard and I'm quite impressed with the quality of this product. The only negative thing i would say is that I wish it came with hose fittings. Other than that it's a fantastic product.
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Average Customer Review for Sierra 18-7852-1 Fuel Water Separator Kit
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Based On 3 Reviews | Write Review
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Perfect for 98 Mercruiser 3.0
by James from Haverhill, Massachusetts on August 17, 2012
Performs as advertised, same form, fit, function as higher priced OEM offering.
(6 of 7 people found this review helpful)
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As described
by Brian from Export, Pennsylvania on May 12, 2012
Easy to mount and set up. multiple mounting options makes it easy to find a good spot for any set up.
(5 of 6 people found this review helpful)
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Review for Sierra 18-7852-1 Fuel Water Separator Kit
by a Customer on June 23, 2009
Nice kit easy to install and has several choices on how to run your fuel lines....
(31 of 35 people found this review helpful)
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Based On 3 Reviews | Write Review
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Product not received.
by Dave from Seattle, Washington on June 08, 2017
Paid for but never received. It has been over two weeks. No explanation.
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Great product!
by Michael from Noblesville, Indiana on October 07, 2013
I like the fact that the hose barbs came with the kit and that the filter was shrink wrapped to protect it. Installation was a breeze. One note for other installers: pre-fill the filter with gas before you screw it onto the housing it will make start up much easier.
(10 of 11 people found this review helpful)
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Great Product
by Stephen from Hubert, North Carolina on July 04, 2013
If you do not already have one of these installed on your boat, you should waste no time getting one soon! The one I received did not have the two plugs for the unused ports. Luckily I already had some so installing it wasn't a problem.
(7 of 8 people found this review helpful)
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Average Customer Review for Sierra 18-7986-1 Fuel Water Separator Kit
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super product
by William from Cincinnati, Ohio on September 25, 2012
This filter is great. Easy to mount, easy to change, filter works great.
(2 of 2 people found this review helpful)
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GREAT FILTERS
by William from Cincinnati, Ohio on October 05, 2016
I've been using these filters for years. Always keep my gas clean and have more than adequate flow rate for just about any size engine.
(2 of 3 people found this review helpful)
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Perfect fit
by Justin from Jasper, Georgia on July 14, 2016
Works good. Replaced my old filter. Iboats has super fast shipping.
(1 of 2 people found this review helpful)
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The 10 Micron Long does not work on my boat
by Roderick from Toms River, New Jersey on June 22, 2015
Did not work for my 7.4 MPIs L29 mercruiser engines... The fuel flow was not sufficient an starved the engines... I wasted the three of these filters... I am only going to used OEM or Quicksilver from now on...
(1 of 2 people found this review helpful)
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The 10 Micron Long does not work on my boat
by Roderick from Toms River, New Jersey on June 22, 2015
Did not work for my 7.4 MPIs L29 mercruiser engines... The fuel flow was not sufficient an starved the engines... I wasted the three of these filters... I am only going to use OEM or Quicksilver from now on...
(1 of 2 people found this review helpful)
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Great Filter at a Good Price
by Jeffrey from Metairie, Louisiana on May 11, 2015
Excellent filtration and excellent flow rate
(2 of 3 people found this review helpful)
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Fuel Water Separating Filter
by Marc from Spokane, Washington on October 06, 2014
Fast shipping, great product
(1 of 2 people found this review helpful)
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Filters for maintenance...
by John from Richardson, Texas on September 24, 2014
Great price on the filters every boater needs for yearly maintenance!
(1 of 2 people found this review helpful)
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Good value
by Philip from Chelmsford, Massachusetts on September 01, 2013
Does what its supposed to do at a good price.
(1 of 3 people found this review helpful)
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water separators
by Vincent from Hauppauge, New York on May 15, 2013
Received in a quick time product is perfect and good quality
(1 of 2 people found this review helpful)
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sierra water separating filter
by Peter from Bronx, New York on March 27, 2012
Works throughout the year and works great
(2 of 4 people found this review helpful)
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Sierra Filters Work Great
by Michael from Prattville, Alabama on June 13, 2011
I switched to the 10 micron fuel/water separator filter in 2008 and have had great service from them. I change them every 50 hours and keep spares on the boat. I've never had a clog and I don't have issues with the 10% ethanol fuel I'm running. Great price too!
(9 of 11 people found this review helpful)
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Average Customer Review for Sierra 18-7846 Fuel Filter
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Based On 4 Reviews | Write Review
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Sierra fuel filter
by Roger from Greenfield, Indiana on September 14, 2015
Shipped quickly- worked perfect.
(2 of 3 people found this review helpful)
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4cylinder omc
by Mark from Kalkaska, Michigan on June 07, 2013
Part was a perfect fit for the 1991 omc 4 cylinder i/o shipping on time as promised product arrived undamaged
(3 of 6 people found this review helpful)
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Water/Fuel filter
by Thomas from Pearland, Texas on December 26, 2011
Very satisfied, shipped quickly.
(4 of 6 people found this review helpful)
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Review for Sierra 18-7846 Fuel Filter
by a Customer on June 30, 2009
Great price for a quality product !!
(8 of 19 people found this review helpful)
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Q:
What is correct filter for a '93 Merc 175 EFI, old filter?
A:
We will need to know your motor serial number to look up the correct part.


Q:
Is this the same as mercury part 35-18458t4?
A:
Yes that cross references with that OEM number.


Q:
Will this fit a 1998 mercury 135 hp xl?
A:
Yes this will fit your motor as long as you have the fuel-water separator set up.


Q:
I have a merc cruiser 5.7 LX EFI Gen. Current separator is Merc 35-802893T. Which Sierra Separator can I use? See 18- 7945 and 7944 and 7845 and 7844, but all say replace a 35-802893Q and I have series T.?
A:
Unfortunately, the manufacturer only carries for the Q series.


Q:
What is the replacement for this discontinued item?
A:
Sierra part number 18-7846 is similar to the mallory 9-37803. Double check that the oem part being replaced is listed in the description.


Q:
Does this replace a mallory 9-37815 or OEM 981911?
A:
No this is the correct one: http://www.iboats.com/Replacement-Canister-Filter-18-7861-Sierra/dm/view_id.173336


Q:
Does it come with the gasket and O-ring?
A:
Yes. The O-ring is attached to the filter and it acts as a seal. There is no gasket necessary.


Q:
Do you carry the gasket and o ring for this filter?
A:
No. The O-ring is attached to the filter and it acts as a seal. There is no gasket necessary.


Q:
Is there a mounting bracket for this filter?
A:
There is a bracket with this filter.


Q:
How can I determine if I need to replace my fuel/water separating filter for a 4.2L 1989 MerCruiser with 1/4" outlet?
A:
It needs to be changed every 50 hours or once a year.


Q:
Does this come with filter too? 18-79910 sierra?
A:
Yes it includes the filter as well.


Q:
Is this the correct filter for my 2001 F80z outboard?
A:
If you want to just replace your current one, we will need a part number off the filter.


Q:
Does this fit a 2001 115hp yamaha?
A:
This is not called for your motor. We can only cross reference by OEM number for Yamaha. Most are universal it will just depend on some specs that should be recommended by a technician (micron rating and such).


Q:
Will this fit my vx225 TLRA Yamaha?
A:
We will need to know the part number to your current separator filter to cross reference. Yamaha doesn't list it in the original parts list.


Q:
What filter replaces quicksilver 35802893Q?
A:
Based on the part number provided the 18-7845 will work and it is a 10 micro filter. Also a 18-7844 will work based on that part number and that is a 21 micron filter.


Q:
My fule lines are 3/8 id, will this filter work for me ?
A:
Sierra cannot match it up by measurements. They can only match it up by engine application. Contact us at the number at the top of the page for more assistance.


Q:
I have an older boat, it has a water fuel separator filter (probably original). On the front of the filter, clearly states Sierra 18-7848, on the back, states "replaces OMC (174144). Is this the right filter? On the front, there is only 18-7848, there is no -1 at the end. Thanks?
A:
The "-1" indicates packaging only. It is the same part.


Q:
Can youbuy just the filter or does it only come in a kit?
A:
Filter is 18-7844.


Q:
Does this fit on a GM 302 Inboard engine. 2001 Glastron Volvo Penta ???
A:
Please call or chat in with engine info to confirm, we need manufacturer name, horse power, model/serial number.


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