Optimax Fuel System Diagram

Bad injectors bad fuel pumps leaking vst air in fuel lines bad gas bad tps rubber regulator diaphrams dry and crack because of todays fuel content. I take apart the fuel system of my mercury optimax 90 to discover the issue that was causing it not to start.

Mercury Fuel Line Diagram Wire Management Wiring Diagram

The verado outboard is equipped with two fuel filters.

Optimax fuel system diagram. Watch here to learn the maintenance schedule for each filter and maintenance tips. For dfi competitive analysis see pages 194 195. Mercury mariner optimax 200 225 dfi outboard repair manual improved mercury mariner optimax 135150 dfi outboard repair manual improved mercury 115 hp efi 4 stroke outboard repair manual improved mercury 225 hp 4 stroke outboard repair manual improved mercury 30 40 hp fourstroke efi outboard repair manual improved.

Outboard motor installation 2. Also low engine use tends to dry out the diaphrams. Provides pressurized air for the injection process which is key to the optimax dfi operation.

Fasten clamp together with two screws. Symtoms caused by leaking regulator diaphrams point to. If you are having or had fuel issues with your optimax you probably have read about the fuel regulator and how it is not serviceable and mercury would have you order a new port fuel rail for somewhere between 1200 1600.

For initial start of a new engine or for an engine that ran out of fuel or was drained of fuel the fuel system should to be filled as follows. Screws filling fuel system note. Simply enter the original model or serial number assigned to your outboard motor by mercury marine.

Mercury uses a specific system when assigning either serial or model numbers to their mercury outboard motors however either of these can be used to lookup oem parts for your motor. Many thanks to rich brown for posting this vide. Buy oem parts for mercury mercury mariner outboard parts by hp liter 300hp fuel system diagram.

The optimax 2 stage injection system uses air to shoot fuel directly into the top of the cylinder. Squeeze the fuel line primer bulb until it feels firm. This step by step how to video will walk you through the process of inspecting and maintaining the fuel filter on your 6 cylinder mercury verado engine.

The optimax is the most mis diagnosed engine out there.

Mercury 225 Efi Fuel Filter Wiring Diagram