Head Decarbonizing Gasket Kit – Fits Volvo Penta MD7A MD7B (Replaces 876431, 875613)
Head Decarbonizing Gasket Kit – Fits Volvo Penta MD7A MD7B (Replaces 876431, 875613) is backordered and will ship as soon as it is back in stock.
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Head Decarbonizing Gasket Kit – Fits Volvo Penta MD7A MD7B (Replace...
Head Decarbonizing Gasket Kit – Fits Volvo Penta MD7A MD7B (Replaces 876431, 875613) is backordered and will ship as soon as it is back in stock.
Product Details
This Head Decarbonizing Gasket Kit is designed for Volvo Penta MD7A and MD7B marine engine models, starting from serial number 35145. This aftermarket replacement provides all necessary gaskets to perform head decarbon service, ensuring proper sealing and engine performance during routine maintenance.
This kit directly replaces Volvo Penta part numbers 876431, 875613, and 876430, as well as Crom Marine 121047 and 121046, and Orbitrade 21431 and 21430.
- Complete gasket set for head decarbonizing service
- Compatible with Volvo Penta MD7A and MD7B engines
- Aftermarket replacement built to OEM specifications
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| Volvo Penta | 876431 |
| Volvo Penta | 875613 |
| Volvo Penta | 876430 |
| Crom Marine | 121047 |
| Crom Marine | 121046 |
| Orbitrade | 21431 |
| Orbitrade | 21430 |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
| Brand | Model | Notes |
|---|---|---|
| Volvo Penta | MD7A | S/N: 35145 and up |
| Volvo Penta | MD7B | S/N: 35145 and up |
Technical Specs
- Application
- Head Decarbonizing Service
- Engine Family
- Volvo Penta MD7 Series
- Compatible Models
- MD7A, MD7B
- Serial Number Range
- 35145 and above
- OEM Reference
- 876431, 875613
What's in the Box
- 1 × Head Decarb Decarbonizing Gasket Kit
Installation Notes
- Ensure engine is completely cool and disconnect battery before starting work.
- Remove cylinder head according to manufacturer service manual procedures.
- Clean all mating surfaces thoroughly, removing carbon deposits and old gasket material.
- Inspect cylinder head and block for warping, cracks, or damage before reassembly.
- Install new gaskets from this kit in the correct orientation per service manual.
- Torque cylinder head bolts to manufacturer specifications in the proper sequence.
- Allow adequate cure time if sealant is used before starting the engine.
- Check for leaks and proper operation after installation and initial run-in.
Troubleshooting & FAQ
Which Volvo Penta MD7 engines does this kit fit?
This gasket kit fits Volvo Penta MD7A and MD7B marine engines with serial numbers 35145 and above. Verify your engine serial number before ordering.
What is included in this decarbonizing kit?
The kit includes all necessary gaskets required for head decarbonizing service on MD7A and MD7B engines. Compare contents with your service manual to confirm completeness for your specific procedure.
How often should I perform head decarbonizing service?
Decarbonizing intervals depend on engine hours, fuel quality, and operating conditions. Consult your Volvo Penta service manual for recommended maintenance schedules. Signs that service is needed include loss of power, rough idle, or excessive smoke.
Can I reuse the old gaskets?
No, gaskets are designed for single use. Reusing old gaskets can result in leaks, improper sealing, and engine damage. Always replace gaskets when performing head service.
Do I need sealant with these gaskets?
Follow your engine's service manual recommendations. Some gaskets require sealant while others are installed dry. Using sealant incorrectly can cause leaks or gasket failure.
What torque specifications should I use for reassembly?
Always follow the torque values and tightening sequence specified in the Volvo Penta service manual for your engine model. Incorrect torque can lead to leaks or head gasket failure.
OEM vs. Aftermarket?
This listing is an aftermarket replacement (not OEM). Built to OEM-level specifications with comparable materials. Manufactured in an ISO 9002 facility, batch-inspected for consistency.
Shipping speed & cost
We ship worldwide quickly—typical transit 5–15 days. Standard shipping is free; expedited options appear at checkout where available.
Warranty & returns
Covered by a 1-year warranty against manufacturing defects under normal use. If issues arise, contact support with your order details. Returns are accepted within our standard window (unused & in original condition). See our policy page or reach out for instructions.
Safety & Important Info
- Verify images/specifications against your original part. If anything differs—even if your model appears compatible—do not purchase.
- This is an aftermarket replacement, not an OEM component.
- Professional installation is recommended for safety and performance.
About Sea Sierra
- Pro-Grade Standards — We supply marine parts engineered to OEM-level tolerances and tested for real-world conditions.
- Fast Global Fulfillment — Free standard delivery to most regions in 5–15 days.
- Manufacturer-Direct Value — Fair pricing without compromising on materials or QC.
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