The Enginetech M181CS-A is a marine lower gasket set (engine conversion gasket set) for the 3.0L 181ci I4 inboard marine engine - a GM-derived 181ci inline-four used across MerCruiser, Volvo Penta, OMC, Crusader, PCM, Indmar marine applications. The set provides the gaskets and seals needed to reseal the short-block-to-long-block sealing surfaces during an in-frame or out-of-frame marine engine rebuild.
| Brand | Enginetech |
| Part Number | M181CS-A |
| Type | Marine Lower Gasket Set (Engine Conversion) |
| Engine | 3.0L 181ci I4 marine |
| Marine Applications | MerCruiser, Volvo Penta, OMC, Crusader, PCM, Indmar |
| Country of Origin | US |
| UPC | 707473098229 |
| Weight | 1.5 lb |
Marine Application: Fits 3.0L 181ci I4 inboard marine engines in MerCruiser, Volvo Penta, OMC, Crusader, PCM, Indmar stern drive and direct-drive inboard installations. Confirm your engine's block family and casting against Enginetech's marine catalog before purchase, as marine engine families use different rear main seal and timing cover designs across model years.
Important Notes:
- Marine-specific application - not intended for automotive passenger-vehicle installations.
- Confirm engine block casting and serial number against Enginetech's marine catalog before purchase.
- Cross-references: CS5719.
Quantity: Sold as one complete set. One set services one engine.
About Enginetech Lower Gasket Sets: Enginetech lower gasket sets (also called engine conversion gasket sets) supply the gaskets and seals needed to convert a short block into a running long block. Each set is engineered for a specific engine family rather than a generic application, with materials and thicknesses matched to the factory sealing surfaces - oil pan, timing cover, front crankshaft, rear main, valve cover, and supporting sensor plugs and O-rings where applicable. Enginetech's part-number consolidation covers more engines with fewer SKUs, which keeps rebuild costs down without sacrificing fitment accuracy. Paired with a matching head gasket set, a lower gasket set completes the full engine reseal scope for a standard rebuild.
WARNING: This product can expose you to chemicals known to the State of California to cause cancer and/or reproductive harm.
