Oil Pressure Light Switch – Fits Volvo Penta & OMC 3.0–8.2L Engines
Oil Pressure Light Switch – Fits Volvo Penta & OMC 3.0–8.2L Engines is backordered and will ship as soon as it is back in stock.
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Oil Pressure Light Switch – Fits Volvo Penta & OMC 3.0–8.2L Eng...
Oil Pressure Light Switch – Fits Volvo Penta & OMC 3.0–8.2L Engines is backordered and will ship as soon as it is back in stock.
Product Details
This Oil Pressure Light Switch is an aftermarket replacement for selected Volvo Penta and OMC Cobra stern-drive applications. It is designed to operate the engine's low-oil-pressure warning circuit and is listed for 4-cylinder, V6, and V8 gasoline engines in 3.0L, 4.3L, 5.0L, 5.7L, 7.4L, and 8.2L configurations.
The switch cross-references Volvo Penta part numbers 3841607 and 3852215, as well as OMC Cobra part numbers 0379948 and 3852215. The corresponding Sierra aftermarket reference is 18-5894.
- Oil-pressure warning switch for an engine warning light or alarm circuit.
- Suitable for listed Volvo Penta stern-drive and OMC Cobra stern-drive applications.
- Replacement application for the original pressure-warning switch when the reference number and engine configuration match.
- Sold as one individual oil-pressure light switch.
Part Number Matrix
Use the following references to compare the switch with the part removed from your engine. Part-number matching and the listed engine application should both be confirmed before ordering.
| Brand or Reference | Part Number | Application | Reference Type |
|---|---|---|---|
| Volvo Penta | 3841607 | Oil-pressure switch reference | OEM reference |
| Volvo Penta | 3852215 | Oil-pressure switch reference | OEM reference |
| OMC Cobra | 0379948 | Oil-pressure warning switch reference | OEM reference |
| OMC Cobra | 3852215 | Oil-pressure warning switch reference | OEM reference |
| Sierra | 18-5894 | Oil pressure light switch | Aftermarket cross-reference |
Engine & Model Compatibility
This listing covers this switch for Volvo Penta and OMC oil-pressure switch applications covering 4-cylinder, V6, and V8 gasoline engines in the displacements below. Exact model, year, serial-number, and connector details are not provided, so verify the original switch and engine documentation before installation.
| Brand or Drive | Component | Engine Configuration | Displacement | OEM References |
|---|---|---|---|---|
| Volvo Penta stern drive | Oil-pressure switch | 4-cylinder, V6, and V8 gasoline engines | 3.0L, 4.3L, 5.0L, 5.7L, 7.4L, 8.2L | 3841607, 3852215 |
| OMC Cobra stern drive | Oil-pressure switch | 4-cylinder, V6, and V8 gasoline engines | 3.0L, 4.3L, 5.0L, 5.7L, 7.4L, 8.2L | 0379948, 3852215 |
Technical Specs
- Product Type
- Oil pressure light switch
- Function
- Activates the engine's low-oil-pressure warning circuit
- Application
- Volvo Penta and OMC Cobra stern-drive gasoline engines
- Engine Configurations
- 4-cylinder, V6, and V8
- Listed Displacements
- 3.0L, 4.3L, 5.0L, 5.7L, 7.4L, and 8.2L
- OEM References
- 3841607, 3852215, and 0379948
- Aftermarket Reference
- Sierra 18-5894
- Product Status
- Aftermarket replacement; not an OEM-manufactured component
What's in the Box
- 1 × Oil Pressure Light Switch
Installation Notes
- Turn off the engine and allow it to cool. Disconnect the battery before beginning work.
- Locate the oil-pressure switch on the engine and compare the replacement with the original part and reference number.
- Disconnect the electrical wire from the original switch.
- Remove the original switch with the appropriate wrench. Protect the surrounding area from any minor oil leakage.
- Clean the mounting-port threads and inspect them for damage.
- Install the replacement switch using the sealing method and tightening specification recommended for your specific engine. Do not overtighten.
- Reconnect the electrical wire securely to the switch.
- Reconnect the battery and start the engine.
- Check for oil leakage and confirm that the oil-pressure warning system operates correctly.
- If the warning remains active, shut down the engine and diagnose the actual oil pressure and the rest of the warning circuit before continued operation.
Troubleshooting & FAQ
Is this an oil-pressure sender for a gauge?
No. This product is an oil-pressure light switch intended for a warning-light or alarm circuit. It should not be treated as a variable-pressure sender for an analog gauge unless your engine documentation specifically confirms that application.
Which engine sizes are listed for this switch?
The available application data lists 4-cylinder, V6, and V8 gasoline engines with 3.0L, 4.3L, 5.0L, 5.7L, 7.4L, and 8.2L displacements for Volvo Penta and OMC Cobra stern-drive applications.
Which original part numbers does it replace?
The documented references are Volvo Penta 3841607 and 3852215, OMC Cobra 0379948 and 3852215, and the Sierra aftermarket reference 18-5894. Confirm the number on your original switch before ordering.
What are the symptoms of a failed oil-pressure light switch?
Possible symptoms include a warning light or alarm that remains on, flickers, fails to activate, or behaves inconsistently. Because similar symptoms can result from low oil pressure, wiring faults, or a gauge-system issue, verify actual engine oil pressure before operating an engine with a persistent warning.
Does this listing include a kit or additional fittings?
No. This listing is for one individual oil-pressure light switch. Additional fittings, wiring, gaskets, and other components are not included unless specifically stated in the package contents.
Is this an OEM part?
No. This is an aftermarket replacement. The OEM and aftermarket numbers shown above are provided as application references only.
Safety & Important Information
- Verify the original part number, switch appearance, mounting arrangement, electrical connection, and engine application before purchase.
- Do not assume that every Volvo Penta or OMC engine in the listed displacement range uses the same switch. Model, year, serial number, and configuration can affect fitment.
- A warning light or alarm can indicate genuinely low oil pressure. Do not continue operating the engine until the cause has been checked.
- Follow the engine manufacturer's service instructions and torque requirements during installation.
- This is an aftermarket replacement, not an OEM component.
About Sea Sierra
- Marine Replacement Parts — We supply replacement components for common marine engine and stern-drive service applications.
- Application-Focused Listings — Product references and compatibility information are provided to help customers compare the replacement with the original part.
- Value-Oriented Service — We offer aftermarket alternatives for routine marine maintenance and repair needs.
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