Inline Fuel Filter 35-879885Q for Mercury Mariner 40 50 60 75 90 115 HP 4 Stroke Verado 18-7718 — United Kingdom Local Warehouse
Inline Fuel Filter 35-879885Q for Mercury Mariner 40 50 60 75 90 115 HP 4 Stroke Verado 18-7718 — United Kingdom Local Warehouse
Product Overview
Inline fuel filter for Mercury and Mariner four-stroke outboards from 40 HP to 300 HP, supplied as 1 filter, shipping weight 80 g in a 145 mm x 85 mm x 105 mm (5.7 x 3.3 x 4.1 in) box. It replaces Mercury 35-879885Q, 35-879885T and 35-879885K, crossing to Sierra 18-7718, and it sits in the fuel line ahead of the engine as the first barrier for dirt and water. Dispatched from our United Kingdom local warehouse.
The 75-115 four-stroke 1.7 L takes this filter from serial 1B366823, and the 50 EFI from serial 1B905505. The same element also serves the Verado range from 135 HP to 300 HP.
Four-stroke outboards run a high pressure fuel system, and a partly loaded filter starves the injectors long before the motor refuses to start. The symptoms are easy to misread: a momentary cut at wide open throttle, a lean stumble coming out of a turn, or plugs that read pale on one bank only.
Specifications
| Specification | Detail |
|---|---|
| Condition | New / New with tags |
| Type | Inline fuel filter |
| Engine Family | Mercury and Mariner four-stroke outboards |
| Horsepower | 40 HP to 300 HP (40HP, 50HP, 60HP, 75HP, 90 HP, 115 HP, Verado 135-300 HP) |
| Quantity | 1 fuel filter |
| Fits | Inline fuel line, four-stroke EFI and Verado models |
| Shipping Weight | 80 g (2.8 oz) with packaging |
| Packaging Size | 145 mm x 85 mm x 105 mm (5.7 x 3.3 x 4.1 in) |
OEM Cross Reference
| Brand | OEM Part Numbers |
|---|---|
| Mercury | 35-879885Q |
| Mercury | 35-879885T |
| Mercury | 35-879885K |
| Mercury | 879885Q, 879885T, 879885K |
| Sierra | 18-7718 |
Compatible Engines
| Model | Horsepower | Serial Number Note |
|---|---|---|
| 30/40 EFI 4-cylinder | 30 HP, 40 HP | All EFI four-stroke |
| 40/50/60 four-stroke | 40 HP, 50 HP, 60 HP | 50 EFI from 1B905505 |
| 75-115 four-stroke 1.7 L | 75 HP, 90 HP, 100 HP, 115 HP | From serial 1B366823 |
| Verado | 135 HP, 150 HP, 175 HP, 200 HP, 225 HP, 250 HP, 300 HP | All Verado |
What's Included
| Component | Qty |
|---|---|
| Inline fuel filter | 1 |
Cold, Wet and Stored Fuel
| What the Boat Does | What the Filter Sees | What to Do |
|---|---|---|
| Sits on a mooring through a damp winter | Condensation in a half-full tank | Change the filter at the start of the season |
| Ethanol blend left standing | Water drawn into the fuel, phase separation | Drain the tank, then fit a new filter |
| Refuels from cans at a club pontoon | Grit and rust from dirty containers | Change the filter after any suspect fuel |
| Long spells between trips | Sediment settles and moves on the first run | Change it before the first trip, not after |
| Twin engine boat | Both filters load at the same rate | Change both at the same time |
| Filter changed, problem remains | Restriction is in the tank pickup | Check the anti-siphon valve and pickup |
Fitting Notes
| Step | Action |
|---|---|
| 1 | Check the serial number, the 75 to 115 HP four-strokes take this filter from serial 1B366823 and the 50 EFI from 1B905505 |
| 2 | Confirm the engine is a four-stroke, two-stroke Mercury and Mariner outboards use a different filter |
| 3 | Release the fuel pressure and catch the spill before opening the line |
| 4 | Note the flow direction arrow on the old filter and fit the new one the same way round |
| 5 | Check the hose ends and clips for cracking while the line is open |
| 6 | Prime the system before cranking |
| 7 | Run the engine and check both connections for weeps |
| 8 | Recheck after the first trip, a slight weep often shows up warm rather than cold |
Condition & Warranty
| Item | Detail |
|---|---|
| Condition | New / New with tags |
| Warranty | Standard |
| Packaging | Sealed retail packaging |
Shipping from the United Kingdom
| Destination | Warehouse | Note |
|---|---|---|
| United Kingdom | United Kingdom local warehouse | Domestic delivery, no import duty |
| Ireland | United Kingdom local warehouse | Customs may apply |
| EU destinations | United Kingdom local warehouse | Customs and import VAT may apply |
Before You Buy
- Check the serial number, the 75 to 115 HP four-strokes take this filter from serial 1B366823 and the 50 EFI from 1B905505
- Confirm the engine is a four-stroke, the two-stroke Mercury and Mariner outboards use a different filter
- Release the fuel pressure and catch the spill before opening the line
- Note the flow direction on the old filter and fit the new one the same way round
- Prime the system and run the engine, then check both connections for weeps
- Repeat the check after the first trip, warm connections are where a weep shows
- This is the filter only, the hose, clips and housing are not included
- 30-Day Easy Returns
- Ships from our United Kingdom local warehouse
Verfügbarkeit für Abholungen konnte nicht geladen werden
Nicht vorrätig
Vollständige Details anzeigen
Boat Owners' Review
Before You Buy
Frequently Asked Questions
What is your refund policy?
We offer a 14-day hassle-free return on all products. Items must be unused and in original packaging. Every XRmarine part is also covered by our 1-year warranty against manufacturing defects. If something is not right, email us at info@xrmarineparts.com — replacement or full refund, your choice.
See our full Refund Policy for complete details.
How does shipping work?
Free international shipping on every order — no minimums. We operate a global warehouse network with a main distribution centre in Asia (10-20 business days). We also hold stock in regional warehouses across the United States, Germany, the United Kingdom, Australia, and Poland (opening soon) — most orders arrive in 1-3 business days within those countries and in 2-8 business days to nearby regions. Tracking included.
See our full Shipping Policy.
How do you keep prices fair?
We cut out the middlemen. XRmarine sources directly from quality manufacturers and sells at honest prices. Same OEM-quality parts, no dealership markup. Every order comes with free shipping, real expert support, and a 1-year warranty.
Learn more on our About Us page.
What payment methods do you accept?
We currently accept PayPal — a fast, secure way to pay online. Credit card payments (Visa, Mastercard, American Express) and Shopify Payments are being set up and will be available soon. We appreciate your patience.