Recmar MerCruiser GM V6 V8 Thermostat Cover 47441A1 18-1977-1
REC47441A1
- Dispatched in 2-3 days
- 30 Day Return Policy
- In stock, ready to ship
- Backordered, shipping soon
Recmar MerCruiser Thermostat Cover
GM V6 / 305 / 350 V8 | Replaces 47441A1
Upper thermostat cover for selected MerCruiser GM V6 and small-block V8 engines using the two-hose-bib housing arrangement. It is commonly paired with lower housing 87290A4.
Key Features
- Two-hose-bib upper thermostat cover
- For selected GM V6 and 305/350 cid V8 applications
- Pairs with specified 87290A4-style lower housing
- Aftermarket Recmar; not genuine Mercury
- Cover only unless accessories are pictured
Technical Specs
| Part type | Upper thermostat housing cover |
| Engine architecture | GM V6 / small-block V8 |
| Typical engines | 4.3L, 5.0L, 5.7L |
| Quantity | 1 cover |
| 4Boats SKU | REC47441A1 |
Compatibility / Fitment Guide
| Engine / system | Application | Required check |
|---|---|---|
| MerCruiser 4.3L V6 | 175 / 185 / 205 variants using the listed cover | Typical 1985–1993 serial groups; verify parts diagram |
| MerCruiser 5.0L V8 | 200 / 228 / 230 variants | Typical 1977–1995 groups; exact serial verification required |
| MerCruiser 5.7L V8 | 250 / 260 and related 350 cid variants | Only housings listing 47441A1 |
| Housing pair | Lower housing 87290A4 where specified | Match two-bib outlet layout and thermostat sleeve |
Not for flat-cap cover 17494A1, Ford V8 housings or every GM V6/V8 cooling layout. Thermostat, lower housing, sleeve, gaskets, tee-ball valves and fasteners are separate unless pictured.
Part Number Cross Reference
| Mercury / MerCruiser | 47441A1; 47441 |
| Sierra | 18-1977-1 |
| GLM | 13220 |
| Barr Marine | MC-29-47441 |
| Mallory / Osco | 9-42506; MC55-TSB |
| Recmar / 4Boats SKU | REC47441A1 |
Cross-reference numbers identify compatible applications; verify against the serial-specific engine diagram.
Frequently Asked Questions
Will it fit every 4.3L MerCruiser?
No. The engine must use the matching two-hose-bib housing and list 47441A1.
Does it include the lower housing?
No. This listing is for the upper cover only.
Is it interchangeable with 17494A1?
No. The flat-cap and two-bib designs are different.
Are gaskets included?
Only if pictured; use new application-specific gaskets during assembly.
Before ordering: compare outlet layout and confirm 47441A1 in the serial-specific thermostat-housing diagram.
For the products under £150 the shipping is £6.99.
Free delivery for most items over £150.
