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

Per-injector rebuild kit for 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 each kit (one injector)

  • 1x upper o-ring (large, yellow)
  • 1x filter and grommet cap assembly
  • 1x lower o-ring (brown)
Price per injector
$10.42
A full engine takes 6, so a complete set is $62.52 plus $7.99 flat shipping ($70.51 delivered). Buy any quantity below.
How many injectors?
$10.42 each $10.42

These kits are out of stock right now, but we can still clean and rebuild the injectors you already have. Start an order.

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 Superseded by 804841.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.