Description
SIERRA Remanufactured Rochester 4-Barrel Carburetor – 18-7615-1 is a remanufactured Rochester four-barrel marine carburetor used on a range of older OMC and selected MerCruiser inboard/sterndrive applications. Sierra remanufacturing includes recalibration, flow testing, base resurfacing and throttle-shaft service to restore predictable fuel metering.
This carburetor covers multiple V6 and V8 marine engine calibrations, so fitment should be confirmed by the original carburetor or OEM assembly number. Baseline idle and fuel settings are established during remanufacture, with final engine-specific adjustment performed after installation.
Key Features
- Rochester 4-barrel marine carburetor
- Precision remanufactured and flow-tested
- Recalibrated for marine engine operation
- Resurfaced mounting base and serviced throttle-shaft bushings
- Includes base gasket and baseline settings
Specifications
- Product type: Remanufactured marine carburetor
- Carburetor family: Rochester 4-barrel
- Typical applications: OMC 3.8L, 4.3L, 5.0L, 5.7L and selected larger V8 marine engines
- Condition: Remanufactured
- Fitment must be confirmed by original carburetor/OEM number
Interchange
- OMC: 981705, 982223, 983855, 981359, 981564, 985822, 981803, 981428
- MerCruiser: 1347-816373A4, 1347-804624R1 / R02 (application dependent)

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