Fuel Water Separator Kit Mercury 35-809097 Clear Bowl 11/16-16
MMS-3106
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Mercury-Style Fuel Water Separator
Reusable clear bowl | 11/16-16 filter thread
This aftermarket marine fuel-water separator kit uses a corrosion-resistant nylon head and reusable clear collection bowl to help remove water and particulate contamination from compatible petrol outboard fuel systems.
Key Features
- ✔ Reusable transparent collection bowl
- ✔ Corrosion-resistant nylon filter head
- ✔ 11/16in-16 TPI Mercury-style filter thread
- ✔ Two stainless-steel hose clamps included
- ✔ For compatible two-stroke and FourStroke petrol outboards
Technical Specs
| Part type | Fuel / water separator kit |
| Overall size | 230 x 110 x 105mm |
| Head material | Nylon |
| Bowl | Reusable clear bowl |
| Filter thread | 11/16in-16 TPI |
| 4Boats SKU | MMS-3106 |
Compatibility / Fitment Guide
Important: this is a complete boat-mounted separator assembly, not an engine-mounted service filter. Mercury 35-809097, Quicksilver 35-8M0146203 and Sierra 18-7919 identify the compatible 11/16-16 spin-on element family. Those references do not, by themselves, confirm that the supplied head, mounting bracket and hose fittings will suit a particular boat.
Use one of these two fitment routes:
- Replacing an existing complete separator: compare the old assembly's filter reference, 11/16-16 element thread, sealing face, 3/8in NPT head ports, 10mm fuel-hose size, mounting-hole position and available clearance.
- Adding a separator to a boat: confirm a petrol outboard installation above deck, adequate fuel-flow capacity for the engine, 10mm fuel hose or approved adaptors, a safe upright mounting point and sufficient service clearance.
| Mercury catalogue family | Serial range / year | What this confirms |
|---|---|---|
| 35 EFI Jet; 40 EFI 4-cylinder; 40 EFI Jet; 40 EFI SeaPro; 50 EFI; 60 EFI; 60 EFI SeaPro | 1C453840 and up | Sierra catalogues the 18-7919 / 35-809097 element family. Check the boat's external fuel system separately. |
| 65 Jet FourStroke; 75 EFI; 75 EFI SeaPro; 80 EFI; 80 Jet FourStroke; 90 EFI; 90 EFI SeaPro; 100 EFI; 115 EFI; 115 EFI SeaPro |
2B095049 and up 100 EFI also catalogued as 2008-up |
Match the serial plate, not horsepower alone. This is an external separator, not the under-cowl filter. |
| 115 Pro XS FourStroke | 2B225488 and up | Element-family match only; verify hose size, flow demand and mounting location. |
| 135 EFI FourStroke | 2B131942 and up | Petrol application. Do not use this clear-bowl kit for diesel. |
| 150 FourStroke | 1B905505 and up | Confirm the complete fuel system can accept the kit's 3/8in NPT ports and 10mm hose barbs. |
| 150 SeaPro | 2B139139 and up | Allow room below the head to inspect, drain and remove the clear bowl and element. |
Exact installation interfaces supplied with this kit:
- Head ports: 3/8in NPT; two threaded blanking plugs are supplied.
- Fuel-hose connections: two 3/8in NPT x 10mm hose barbs and two stainless-steel clamps.
- Replacement-element interface: 11/16-16 centre thread; use only an element and sealing face made for this family.
- Envelope: approximately 230 x 110 x 105mm. Mount upright and leave additional space below for drainage and servicing.
- Flow direction: connect inlet and outlet according to the arrows/markings moulded into the filter head; do not infer direction from bracket orientation.
Explicit exclusions: not for diesel; not for an engine's under-cowl cartridge filter; not for heads using 1in-14, 3/4in-16 or another centre thread; and not automatically compatible with MerCruiser/inboard installations simply because 35-809097 appears in a filter cross-reference.
Clear-bowl location restriction: use for outboard/above-deck installations only. Sierra specifies a flame-resistant metal collection bowl below deck. Do not fit this transparent-bowl assembly in an enclosed engine compartment or any location where regulations require a metal bowl.
Final check before ordering: record the engine model and serial number, then compare the existing element reference (if fitted), port and hose sizes, required fuel flow, mounting space and installation location. A matching horsepower or Mercury badge alone is not a fitment test.
Part Number Cross Reference
| Mercury Marine | 35-809097; 35-8M0103095 |
| Quicksilver | 35-8M0146203 |
| Sierra | 18-7919 |
| Racor | S3213; S3220TUL |
| Yamaha Outboard | MAR-24563-00-00 |
| EMP / Mallory | EMP 35-37811; Mallory 9-37811 |
| 4Boats SKU | MMS-3106 |
Cross-reference numbers identify the compatible 11/16-16 filter family. Compare the filter-head thread, sealing face and bowl clearance before installation.
Questions & Answers
Is this genuine Mercury?
No. It is an aftermarket kit.
Can it be used with diesel?
No. The current specification lists petrol applications only.
Is the bowl reusable?
Yes, the clear bowl is listed as reusable when serviced in accordance with its instructions.
Are hose clamps included?
Two stainless-steel hose clamps are listed as included.
Note: Install away from heat and ignition sources, use fuel-approved components and complete a careful leak test.
For the products under £150 the shipping is £6.99.
Free delivery for most items over £150.
