8M6002988 – Diaphragm – Mercury Optimax

The genuine Mercury Diaphragm 8M6002988 regulates fuel pressure to the engine and helps keep your outboard running strong. It fits a wide range of Mercury TwoStroke and Diesel outboards.

This diaphragm suits Mercury OptiMax TwoStroke outboards, including 1.5L models rated 75–125 hp (serial numbers 1B417702–2B112787). It also fits 2.5L engines rated 115–150 hp (0G960500–0T178499) and 125–175 hp (1B736885–2B112787). In addition, it supports 3.0L OptiMax Pro XS and XS models rated 200–300 hp (serial numbers 1B504989–2B535571).

The diaphragm also fits Mercury 3.0L Diesel DSI outboards with serial number 1E052967 and above. It is compatible with Jet-Powered 3.0L DFI outboards starting from serial number 1E003046.

This listing is for the 8M6002988 diaphragm assembly only, not a complete kit. It includes the diaphragm and an instruction sheet. Mercury tests this material for durability and long service life in harsh marine conditions. Decades of engineering, testing, and manufacturing experience back Mercury parts and accessories to ensure proper fit, reliable function, and dependable performance.

Shop at Arizona Outboard Dismantlers to keep your outboard running strong and ready for the water.