New Cylinder Head 3.0L Mercruiser, Volvo Penta, OMC, 8M0188300, 3854012
RM3.0CH
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Cylinder Head 3.0L (1991+)
MerCruiser • Volvo Penta • OMC • RM3.0CH
This is a brand-new, premium aftermarket cylinder head designed specifically for the 3.0L GM-based marine engines produced from 1991 to the present. Engineered for the rigours of the marine environment, this head features the updated "small port" (HO) design that delivers optimized performance and reliability.
Key Features
- ✔ Direct fit for 1991-Present 3.0L engines
- ✔ Updated small-port HO design
- ✔ Precision-machined gasket surfaces
- ✔ Hardened seats for unleaded fuel
- ✔ Compatible with screw-in rocker studs
Technical Specs
| Engine Size | 3.0L / 181 CID |
| Configuration | Inline 4-Cylinder |
| Material | Heavy Duty Cast Iron |
| Application | Marine (Petrol) |
| Era | 1991 - Present |
Compatibility / Fitment Guide
| Make / System | Model / Application | Notes |
|---|---|---|
| MerCruiser | 3.0L, 3.0LX, 3.0L TKS | 1991 & Newer |
| Volvo Penta | 3.0GL, 3.0GS, 3.0GXi | 1991 & Newer |
| OMC Cobra | 3.0L / 181 CID | 1991-1994 |
| GM Marine | 181 CID 4-Cylinder | 1-Piece Rear Seal Engines |
OEM Cross Reference
| MerCruiser / Mercury | 8M0188300, 8M0115135, 809891, 810849, 938-803860T11 |
| Volvo Penta | 3854012 |
| OMC | 3854012, 0986960 |
| GM Casting Numbers | 14098620, 10140599, 93441744 |
| Recmar | RM3.0CH, REC936-810849 |
Questions & Answers
Is this a genuine original part?
This is a premium quality aftermarket replacement part from Recmar, manufactured to meet or exceed original equipment (OE) standards for fitment and performance.
Will this fit my pre-1990 engine?
This head is specifically for the 1991 and newer "small port" engines. While it can physically bolt onto older 3.0L blocks, you may require an intake manifold adapter or update due to the different port shapes.
Does this head come assembled?
This listing typically includes the valves and springs already installed (assembled). We always recommend checking your specific order contents to confirm if rockers and pushrods are included or if they should be transferred from your existing head.
Note: Please verify your original part number or casting number against the references above before purchasing. Distributed by 4boats.co.uk.
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