1347-9661A3 Aftermarket MerCruiser Rebuilt Rochester 4-Barrel Carburetor | Sawley's Select Marine Parts

🔧 Product Description

Aftermarket rebuilt-style MerCruiser Rochester Quadrajet 4-barrel carburettor - Replacement Part Number: 1347-9661A3

A replacement for the Rochester Quadrajet carburettor fitted to specific MerCruiser 305 CID / 5.0L V8 engines. Direct 1347-9661A3 applications include the 228, 230 and 5.0LX engine families across the documented year and serial groups below. Related Rochester marine calibrations were also used on selected 245HP, 250HP and 260HP engines, but those applications must be confirmed by the original carburettor number rather than displacement alone.

⚙️ Key Features

• Marine Rochester Quadrajet-pattern 4-barrel carburettor

• Calibrated replacement for selected MerCruiser 305 CID / 5.0L V8 engines

• Small primaries support controlled idle and cruise fuel delivery

• Large secondaries supply additional airflow under acceleration and load

• Replaces the listed OEM and Rochester service references when correctly matched

🔄 Supersession & Cross Reference

OEM Supersession Chain:

• 1347-804623R02 → Remanufactured service reference for 1347-9661A3

• 1347-804623R02 → Remanufactured service reference for 1347-804623A1

• 1347-9661A3 (original application reference)

OEM / Related Numbers:

• 1347-9661A3

• 1347-804623A1

• 1347-804623R02

• Rochester 17057283

• Rochester 17057285

• Rochester 17059291

• Rochester 17059292

• Rochester 17080564

• Rochester 17080565

Aftermarket / Verified Equivalents:

• Sierra: 18-7605-1

• Mallory: 9-34007

• Mallory: 9-34069

• Mallory: 9-34082

🚤 Compatibility

Commonly used on:

• MerCruiser GM 305 CID / 5.0L carburetted V8 sterndrive engines

Typically suits:

• Engine models and serial ranges:

• MerCruiser 228, 305 CID V8, 1982-1984: serial 6218462-6899268

• MerCruiser 230, 305 CID V8, 1985-1987: serial 6899269-0B773739

• MerCruiser 5.0LX, 305 CID V8, 1988-1995: serial 0B773740-0F600999

• Related calibration family:

• Selected MerCruiser 245HP, 250HP and 260HP Rochester applications where the original number cross-references directly

• HP Range: 228HP - 230HP for direct 1347-9661A3 applications

• Engine Type: GM 305 CID / 5.0L carburetted V8 marine engine

• Year Range: Approximately 1982 - 1995

🔌 Function

The Quadrajet meters fuel through primary circuits for starting, idle and cruising, then opens the secondary system as airflow and load increase. Correct throttle, choke and secondary calibration is essential for smooth acceleration and safe marine engine operation.

Common signs of failure:

• Hard starting, flooding or ineffective choke operation

• Rough idle, stalling or inconsistent idle mixture

• Hesitation, bogging or backfire during throttle opening

• Restricted secondary operation and reduced high-load power

• Rich exhaust, plug fouling or excessive fuel consumption

• Fuel seepage, worn throttle shafts or sticking float components

📦 Condition

• Brand new aftermarket replacement part

• New and unused

• Supplied in manufacturer or equivalent protective packaging