2830 86234A4 86234A05 Mercruiser Carter Fuel Pump | Genuine Used Part

🔧 Product Description

Genuine MerCruiser Carter Mechanical Fuel Pump - Current Part Number: 86234A05

A genuine Carter-style mechanical diaphragm fuel pump used on a broad range of GM-based marine four- and six-cylinder engines. MerCruiser service number 86234A05 replaces 86234A4. Number 2830 is a Carter casting or model identifier found on the pump body rather than a Mercury supersession number.

⚙️ Key Features

• Genuine marine mechanical fuel pump
• Current MerCruiser service number 86234A05
• Supersedes 86234A4
• Carter production / casting identifier 2830
• Used on GM 153, 181, 224, 225 and 250 CID marine engines

🚤 Compatibility

• MerCruiser 2.5L / 153 CID inline-four
• MerCruiser 3.0L / 181 CID inline-four
• MerCruiser 3.7L / 224 CID inline-four
• MerCruiser 3.7L 470 / 485 / 488 family where the pump geometry matches
• MerCruiser 4.1L / 250 CID inline-six
• Selected OMC, Volvo Penta, Indmar and Marine Power GM-based four- and six-cylinder marine engines using the same pump flange and lever
• Fitment is controlled by block mounting, actuating lever, inlet / outlet orientation and vapour-return configuration

🔌 Function

The engine camshaft operates the pump lever, flexing the diaphragm to draw fuel from the tank and deliver it to the carburettor at regulated low pressure.

⚠️ Common Signs of Failure

• Fuel leaks from the body or vent
• Engine starves under load
• Pump produces excessive fuel pressure
• Diaphragm allows fuel into the crankcase
• Actuating lever or return spring is worn
• Inlet or outlet check valves fail

🔄 Supersession & Cross Reference

OEM Supersession Chain

• 86234A05 → Supersedes 86234A4
• Earlier related MerCruiser references include 86234A3, 86234, 77594, 71327 and 47585
• 2830 is a Carter casting or production identifier
• OMC 985602, 985603, 982240 and 509395 are cross-brand marine references for compatible pump configurations

OEM / Related Numbers

• 86234A05
• 86234A4
• 86234A3
• 86234
• 77594
• 71327
• 47585
• Carter 2830
• Carter / aftermarket flange family M60032 / 60032
• OMC 985602, 985603, 982240 and 509395

Aftermarket / Verified Equivalents

• Sierra 18-7278
• Mallory 9-35419
• Carter marine mechanical replacement for the M60032 / 60032 family
• Fuel Pump Factory marine replacement
• Automotive Authority marine fuel pump
• Sierra 18-0889 related mounting gasket
• Sierra 18-7860 related pump filter where applicable

📦 Condition

• Genuine used part
• Removed from running engine where applicable
• In good working condition unless otherwise stated