Fuel Pressure Regulator Assembly 892681 18-33211 for Mercury Mercruiser 5.0L 8.2L
Fuel Pressure Regulator Assembly 892681 18-33211 for Mercury Mercruiser 5.0L 8.2L
Product Overview
Fuel pressure regulator assembly 892681 is the direct replacement part for Mercury and MerCruiser 5.0L to 8.2L MPI engines, the regulator that holds rail pressure steady on the 350, 477, 484, 496, 520 and 540 series. It fits the Scorpion 350 and 377 as well, comes in a 150 x 100 x 50 mm box at 94 g, and it replaces 892681, 18-33211 and 9-33211.
The regulator sits on the fuel rail and returns excess fuel to the tank, keeping the pressure the injectors see at a fixed value above manifold pressure. A weak diaphragm drops that pressure under load and the motor runs lean; a split one floods the rail and the motor runs rich and hard to start.
Fit a new regulator rather than a used one. The diaphragm is rubber and it ages in the same way the hoses do, so a regulator from a donor engine is usually no better than the one coming off.
Specifications
| Specification | Detail |
|---|---|
| Condition | New / New with tags |
| Type | Fuel pressure regulator assembly |
| Fits | Mercury and MerCruiser 5.0L to 8.2L MPI engines |
| Series | 350, 477, 484, 496, 520, 540, Scorpion 350 and 377 |
| Replaces | 892681, 18-33211, 9-33211 |
| Contents | Regulator assembly |
| Net Weight | 94 g including packaging |
| Pack Size | 150 mm x 100 mm x 50 mm |
| Country of Origin | Taiwan |
| Warranty | 3 year |
OEM Cross Reference
| Component | OEM Part Numbers |
|---|---|
| Fuel pressure regulator assembly | 892681 |
| Sierra cross reference | 18-33211 |
| Mallory cross reference | 9-33211 |
Compatible Engines
| Series | Displacement | Notes |
|---|---|---|
| 350 | 5.0L and 5.7L | MPI sterndrive and inboard |
| 477 and 484 | 6.2L | MPI sterndrive and inboard |
| 496 | 8.1L | MPI inboard and tow sport |
| 520 and 540 | 8.2L | Serial 0M970122 and up, 0M970866 and up |
| Scorpion 350 and 377 | 5.7L and 6.2L | Tow sport and ski engines |
What's Included
| Component | Detail | Qty |
|---|---|---|
| Fuel pressure regulator assembly | As pictured | 1 |
| O rings and seals | Reuse or replace separately | 0 |
| Fuel rail and injectors | Not included | 0 |
Symptoms Of A Failed Regulator
| What You See | What It Means | What To Do |
|---|---|---|
| Hard starting when hot | Rail pressure bleeding down | Fit the new regulator |
| Rich smell and black plugs | Diaphragm split, pressure too high | Fit the new regulator |
| Lean under load and a stumble | Pressure falling at high demand | Fit the new regulator |
| Fuel in the vacuum reference line | Diaphragm ruptured | Fit the new regulator straight away |
| Long crank before it fires | Pressure not held after shut down | Check the regulator and the pump check valve |
| Fuel pressure reads wrong at the rail | Regulator not controlling | Test the pump first, then fit the regulator |
Fitting Notes
| Step | Action |
|---|---|
| 1 | Check the engine serial number against the model list |
| 2 | Release the fuel pressure at the rail before opening anything |
| 3 | Disconnect the battery and keep a fire extinguisher within reach |
| 4 | Take off the vacuum reference line and the return line |
| 5 | Unbolt the regulator and lift it off with its O ring |
| 6 | Clean the mounting face and fit the new O ring |
| 7 | Fit the new regulator, reconnect the lines and the reference hose |
| 8 | Pressurise the rail, check for leaks, then check running pressure |
Condition & Warranty
| Item | Detail |
|---|---|
| Condition | New / New with tags |
| Warranty | 3 year |
| Packaging | Sealed retail packaging |
Before You Buy
- Fits Mercury and MerCruiser 5.0L to 8.2L MPI engines
- Covers the 350, 477, 484, 496, 520 and 540 series
- Covers Scorpion 350 and Scorpion 377
- Replaces 892681, 18-33211 and 9-33211
- Complete regulator assembly
- O rings and seals are not included
- Check the engine serial number before ordering
- 30-Day Easy Returns
- Ships from our warehouse with tracking
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Before You Buy
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