Mercury OptiMax fuel injector service kit
Kit contents OptiMax injector OptiMax injector

Kit photo and injectors from real OptiMax motors we've serviced.

Mercury OptiMax DFI Injector Service Kit

Complete rebuild kit for all 6 injectors in Mercury and Mariner OptiMax 135hp, 150hp, and 175hp DFI 2-stroke outboards, and the Mercury SportJet 200 DFI. Same injector body across all these variants — same seal kit for all of them.

What's in this kit (all 6 injectors)

  • 6x upper o-ring (large, yellow)
  • 6x filter and grommet cap assembly
  • 6x lower o-ring (brown)
Complete 6-injector engine kit
$34.99
Free shipping — USPS Ground Advantage
Shop-verified: We use these exact kits on injectors we service here. Same parts, same supplier — if we trust them in customer engines, we're confident selling them to you.

If you have a 200hp, 225hp, or 250hp standard OptiMax (the larger 3.0L V6), that engine uses a different injector — check with us before ordering.

Compatibility

All from our service records and OEM catalog data. 6 injectors per engine.

Part / Model Engine Notes
Deka 37006
Mercury 804841		 Mercury/Mariner OptiMax 135hp DFI
2.5L V6 2-stroke (2001–2006) 		Black top. Standard flow. Serial from approx. OG590000+.
Deka 37006
Mercury 804841		 Mercury SportJet 200 DFI
2.5L V6 2-stroke (2001–2006) 		Same 37006 injector as the 135hp OptiMax — the SportJet 200 is a jet-drive engine built on the same 2.5L block. 6 injectors per engine.
Deka 37003
Mercury 37003-804841		 Mercury/Mariner OptiMax 150hp DFI
Mercury/Mariner OptiMax 175hp DFI
2.5L V6 2-stroke (2001–2006) 		Purple top. Slightly different flow tuning than 37006. Same body, same seal kit. Aftermarket suppliers list the 37003-804841 as fitting the full 135-175hp range.
Mercury 804527
Early OEM number		 Mercury OptiMax 135–150hp DFI
2.5L V6 2-stroke (1999–2000 early production) 		Pre-2001 OEM number. Superseded by 804841. Same injector body and seal kit.

Cross-Reference Part Numbers

Deka 37003 Deka 37006 37003-804841 Mercury 804841 Mercury 804527 Mariner 804841

Not sure which you have? Look at the top of the injector. Purple top = 37003 (150hp/175hp). Black top = 37006 (135hp, SportJet 200). Both use this same seal kit. The 200hp, 225hp, and 250hp standard OptiMax run on the larger 3.0L block with a different injector (804528/37001) — this kit does not fit those. The SportJet 200 DFI is the exception: it uses the 2.5L block and the 37006.