1347-816373A4 Aftermarket MerCruiser Q-Jet 4-Barrel Carburetor | Sawley's Select Marine Parts

🔧 Product Description

Aftermarket MerCruiser Q-Jet-style 4-barrel carburettor - Replacement Part Number: 1347-816373A4

A replacement Rochester Quadrajet-pattern marine carburettor for selected MerCruiser and OMC GM V8 applications. This service family is commonly catalogued for carburetted 5.0L and 5.7L engines from approximately 1982-1995, including MCM 260, 350 MAG and selected 5.0L, 5.0LX and 5.7L configurations. Quadrajet calibration, choke arrangement, fuel inlet and linkage must be matched to the original carburettor number before installation.

⚙️ Key Features

• Marine-calibrated Q-Jet-style 4-barrel carburettor

• Small primary bores support efficient low-speed operation and cruising

• Large secondary bores provide increased airflow under load

• Suitable for selected GM 305 CID and 350 CID marine V8 engines

• Direct replacement for the listed MerCruiser and OMC references when calibration matches

🔄 Supersession & Cross Reference

OEM Supersession Chain:

• 1347-816373A4 → Service replacement for 1347-804624R02

• 1347-804624R02 → Remanufactured service reference for 1347-804624R1

• 1347-804624R1 (earlier service reference)

OEM / Related Numbers:

• 1347-816373A4

• 1347-804624R02

• 1347-804624R1

• 1347-6492A1

• 1347-7362A1

• 1347-8289A1

• 1347-8292A4

• 1347-9415T

• 1347-9662A4

• 3310-804624R1

• OMC 981359

• OMC 981428

• OMC 981564

• OMC 981705

• OMC 981803

• OMC 982215

• OMC 982223

• OMC 983855

• OMC 985822

Aftermarket / Verified Equivalents:

• Sierra: 18-7615-1

• Sierra: 18-7618-1

• Mallory: 9-34004

• Recmar: REC1347-816373A4

🚤 Compatibility

Commonly used on:

• MerCruiser GM-based carburetted V8 sterndrive and inboard engines

• Selected OMC GM 5.0L and 5.7L marine V8 applications using the listed original numbers

Typically suits:

• Engine models:

• MCM 260 / 5.7L

• 350 MAG carburetted Rochester applications

• 5.0L

• 5.0LX

• 5.7L

• Selected 260 MIE 5.7L applications

• Engine Displacement: 305 CID / 5.0L and 350 CID / 5.7L

• HP Range: Commonly 200HP - 260HP on direct MerCruiser applications

• Engine Type: GM-based carburetted V8 marine engine

• Year Range: Approximately 1982 - 1995

🔌 Function

The four-barrel carburettor meters fuel into the engine through primary and secondary circuits. The primaries support starting, idle and normal cruising, while the secondaries supply the additional mixture required during acceleration and high-load operation.

Common signs of failure:

• Hard starting, poor choke operation or repeated flooding

• Rough idle, stalling or excessive idle speed

• Hesitation or backfire when the throttle is opened

• Secondary barrels fail to open correctly or engine lacks high-load power

• Rich running, black smoke, plug fouling or high fuel consumption

• Fuel seepage, bowl leakage or sticking float and needle components

📦 Condition

• Brand new aftermarket replacement part

• New and unused

• Supplied in manufacturer or equivalent protective packaging