Mechanical Fuel Pump for Boat Inboard Marine Engines | Fits Mercruiser 3.0L 2.5L 3.7L and OMC engines. Replaces part numbers 86234A4 985603.

Mechanical Fuel Pump – Get Your Boat Back on the Water Is your boat struggling to start or losing power at high RPM? A failing fuel pump is often the culprit. The Lanotech mechanical fuel pump is a direct, bolt-on replacement for worn-out original pumps on popular Mercruiser and OMC marine engines. Why choose this pump? Perfect for older engines (1967-1989) – Specifically designed for Mercruiser inline 4 & 6 cylinder and OMC applications. OEM-grade quality – Manufactured from heavy-duty metal with precise tolerances for consistent fuel delivery. Easy installation – Includes a new mounting gasket. Follow our fitment guide (see bullet points) to confirm your pump type. Known compatible models (partial list): Mercruiser: 2.5L (120hp), 3.0L (140hp), 3.7L (470/485/488), 4.1L inline 6 (160/165hp) OMC: 2.5L (100/110/120hp), 3.0L (140hp) Important Note: Always verify your filter bowl direction (UP = correct for this pump). If unsure, check your old pump’s flange number or fitting clock positions before ordering. Package includes: 1 x Mechanical Fuel Pump 1 x Mounting Gasket

• FIX STARTING ISSUES: Direct bolt-on mechanical fuel pump replacement designed to resolve boat stalling and hard-starting problems effectively.
• WIDE COMPATIBILITY: Fits Mercruiser 2.5L 120hp, 3.0L 140hp, 3.7L (470/485/488) and OMC 2.5L 100-140hp marine inboard engines.
• CRITICAL FITMENT RULE: Fits applications where the fuel filter bowl faces UP. Please verify your bowl direction before ordering.
• PERFECT REPLACEMENT: Meets or exceeds OEM standards. Replaces part numbers 86234A4, 86234A05, 60032, 985603, 985602, and 18-7278.
• MARINE GRADE QUALITY: Built with a premium traditional diaphragm design and durable metal construction to resist corrosion in harsh marine environments.