Fuel Filter Element Gen 3 Cool Fuel 8M0093688 for MerCruiser Alpha Bravo 5.7 6.2 8.2
Fuel Filter Element Gen 3 Cool Fuel 8M0093688 for MerCruiser Alpha Bravo 5.7 6.2 8.2
Product Overview
Fuel filter element for the MerCruiser Gen 3 Cool Fuel module on Alpha and Bravo engines, the filter that sits inside the cool fuel canister and takes the water and dirt out of the fuel before it reaches the pump. It replaces MerCruiser 35-866171A01 and 8M0093688 and crosses to Sierra 18-7977, and it ships as one element in a 145 mm x 85 mm x 105 mm box at 114 g.
The Gen 3 Cool Fuel module is fitted to the MPI engines from 5.0 L up to the 8.2 L big block, and the element inside it is a service item: MerCruiser calls for it at the first service and then on the normal fuel filter interval. The module itself is cooled by raw water, which is why the filter is called a cool fuel filter, but the element is a plain fuel filter and it is the only part that gets changed.
A loaded element shows itself as a loss of top end first. The engine pulls cleanly up to about three quarters throttle and then runs out of fuel, and on an MPI engine that also means the fuel pump is working against a restriction it was not designed for. Water in the element is the other failure, and it usually arrives after a fill from a marina tank that has been sitting.
Changing the element is a short job on these engines: the canister is on the front of the engine and the element lifts out once the cap is off. Keep the old element until the new one is in, because it is worth looking at what came out of it.
Fitment covers the Bravo V8 engines in 5.0 L, 5.7 L and 6.2 L, the big block 496 and 8.2 L, the 520 and 540, and the MPI models from the 350 MAG through the 377 MAG, 383 MAG Stroker, 496 MAG and 496 H.O., including the Scorpion and TowSport variants listed with their serial number breaks in the table below. Check the engine serial number against the table before ordering.
Specifications
| Specification | Detail |
|---|---|
| Condition | New / New with tags |
| Type | Gen 3 Cool Fuel fuel filter element |
| MerCruiser Part Numbers | 35-866171A01, 8M0093688, 35-8M0093688 |
| Sierra Cross Reference | 18-7977 |
| Fits | MerCruiser Alpha and Bravo MPI engines, 5.0 L to 8.2 L |
| Module | Fits inside the Gen 3 Cool Fuel canister |
| Quantity | 1 element |
| Country Of Origin | Taiwan |
| Net Weight | 114 g including packaging |
| Pack Size | 145 mm x 85 mm x 105 mm |
| Pack Size In Inches | 5.71 in x 3.35 in x 4.13 in |
| Warranty | 3 year |
Packing Dimensions
| Measure | Millimetres | Inches |
|---|---|---|
| Box length | 145 mm | 5.71 in |
| Box width | 85 mm | 3.35 in |
| Box height | 105 mm | 4.13 in |
| Weight with packaging | 114 g | 4.02 oz |
OEM Cross Reference
| Brand | Part Numbers |
|---|---|
| MerCruiser (Mercury Marine) | 35-866171A01, 8M0093688, 35-8M0093688 |
| Sierra | 18-7977 |
Compatible Engines
| MerCruiser Engine | Serial Range |
|---|---|
| Bravo V8 5.0L, 5.7L, 6.2L | All |
| Bravo big block 496 and 8.2L | All |
| 520 and 540 | All |
| 5.7L MPI TowSport Gen III | 1A091881 and up |
| 5.7L SKI EC | 1A090000 and up |
| 8.1L TowSport (Base) | 1A380074 and up |
| Scorpion 350 EC | 0W698433 and up |
| Scorpion 377 HO EC | 1A091488 thru 1A092170 |
| 350 MAG MPI | All |
| 5.7L MPI | All |
| 6.2L MPI | All |
| 8.1L Inboard | All |
| MX 6.2L MPI | All |
| 350 MAG MPI Alpha / Bravo | All |
| 377 MAG | All |
| 496 MAG | All |
| 5.0L MPI Alpha / Bravo | All |
| 8.2L Inboard | All |
| 8.2L Mag | All |
| MX 6.2L MPI Bravo | All |
| 383 MAG Stroker Inboard | 1G300000 and up |
| 496 H.O. Bravo | 1G400000 and up |
| 8.1L Inboard (Inline) | 1G300000 and up |
| 8.1L Inboard (V-Drive) | 1G300000 and up |
What's Included
| Component | Detail | Qty |
|---|---|---|
| Fuel filter element | Gen 3 Cool Fuel element, as shown in the photos | 1 |
| Cool Fuel canister and cap | Not included, the element fits inside the original module | 0 |
| Fuel line fittings | Not included, reuse the original lines | 0 |
| Water separating bowl | Not included, this element fits the Gen 3 module | 0 |
Signs The Element Needs Replacing
| What You See | What It Means | What To Do |
|---|---|---|
| Engine runs out of fuel at high throttle | Element restricted | Fit the new element |
| Rough running after a refuel | Water in the element | Fit the new element and drain the tank |
| Fuel pressure low under load | Filter flow reduced | Fit the new element |
| Hard starting when cold | Restricted flow to the pump | Fit the new element |
| Element past its service interval | Scheduled service item | Fit the new element |
| Engine surges at cruise | Intermittent fuel supply | Fit the new element |
Fitting Notes
| Step | Action |
|---|---|
| 1 | Check the engine serial number against the fitment table |
| 2 | Disconnect the battery and release the fuel pressure at the Schrader valve |
| 3 | Clean around the canister cap so nothing falls into the module |
| 4 | Undo the cap and lift the old element out, keeping it for inspection |
| 5 | Check the cap seal and the canister for water and debris |
| 6 | Fit the new element the same way round as the old one |
| 7 | Refit the cap and tighten it as specified, then pressurise the system and check for leaks |
| 8 | Run the engine and check fuel pressure and that it pulls cleanly to full throttle |
Condition & Warranty
| Item | Detail |
|---|---|
| Condition | New / New with tags |
| Warranty | 3 year |
| Packaging | Boxed, 145 mm x 85 mm x 105 mm |
Before You Buy
- Replaces MerCruiser 35-866171A01, 8M0093688 and 35-8M0093688
- Also crosses to Sierra 18-7977
- Gen 3 Cool Fuel element for Alpha and Bravo MPI engines
- Fits 5.0 L, 5.7 L, 6.2 L, 8.1 L, 8.2 L and the 496 big block
- Covers 350 MAG, 377 MAG, 383 MAG, 496 MAG, 496 H.O., Scorpion and TowSport models
- One element supplied
- 114 g with packaging, box 145 mm x 85 mm x 105 mm
- 30-Day Easy Returns
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