Offshoreonly.com - 502 Fuel Injectors

Offshoreonly.com (https://www.offshoreonly.com/forums/)

- General Q & A (https://www.offshoreonly.com/forums/general-q-20/)

- - 502 Fuel Injectors (https://www.offshoreonly.com/forums/general-q/348935-502-fuel-injectors.html)

502 Fuel Injectors

HI! Does anyone know what's the difference if any between GEN 5 & GEN 6 Mercruiser 502 8.2 fuel injectors? When I look and the parts diagram they seem to have the same fuel rails and other related parts. I'm looking to buy some new injectors and gen 5 injectors has a very limited selection. There seems to be more options for gen 6 engines.. Thanks in advance

PM "BUP" here on the forums. I'm sure he'll need serial numbers.

The Gen V engines were all Mefi 1 with Keihin injectors. In mid 98, Mercury changed to the Mefi 3 with a more standard shorty injector. The rails were different as well. The Mefi 1 engines used a VST while the Mefi 3 engine used the cool fuel. The injectors are not interchangeable. You will need the Keihin injectors in your particular engjne.
Eddie

The 805225A 1 injector (the "old" injector) fits the following models:

525 EFI 0M953620 THRU 0M956326

Mercruiser BLACK SCORPION 350 MAG MPI 0M391600 THRU 0W689999

Mercruiser BLACK SCORPION MX 6.2L MPI 0M391750 THRU 0W689999

Mercruiser 454 EFI (SKI) GEN. V GM 454 V-8 1995 0F215800 THRU 0F820099

Mercruiser 454 EFI (GEN. V) GM 454 V-8 1994-1996 0F115700 THRU 0F802349

Mercruiser 502 EFI (GEN. V) GM 502 V-8 1993-1995 0D840650 THRU 0F802599

Mercruiser 7.4LX BRAVO (MPI)(GEN. V) GM 454 V-8 1996 0F602010 THRU 0F801999

Mercruiser 7.4L MPI MIE (LH) GEN. V GM 454 V-8 1995-1996 0F563052 THRU 0F820103

Mercruiser 350 MAG. BRAVO MPI(GEN+) GM 350 V-8 1997 0K001501 AND UP

Mercruiser 454 MAG. MPI BRAVO (GEN VI) GM 454 V-8 1996-1997 0F802350 THRU 0K999999

Mercruiser 502 MAG. MPI (GEN VI) GM 502 V-8 1996 0F802600 THRU 0K999999

Mercruiser 7.4LX BRAVO (MPI)(GEN. VI) GM 454 V-8 1996-1997 0F802000 THRU 0K999999

Mercruiser 454 MAG. MPI (SKI) GEN. VI GM 454 V-8 1996-1997 0F820100 THRU 0K999999

Mercruiser 7.4L MPI MIE (LH) GEN. VI GM 454 V-8 1996-1997 0F820104 THRU 0K999999

Mercruiser 8.2L MIE MPI (LH) GEN. VI GM 502 V-8 1996-1997 0F819620 THRU 0K999999

Mercruiser 454 MAG. MPI BRAVO (GEN VI) GM 454 V-8 1998 0L010029 THRU 0L058399

Mercruiser 502 MAG. MPI BRAVO (GEN VI) GM 502 V-8 1998 0L017000 THRU 0L085432

Mercruiser 454 MAG. MPI HORIZON (GEN. VI) GM 454 V-8 0L002200 THRU 0L086049

Mercruiser 8.2L MIE MPI (GEN. VI) GM 502 V-8 0L002450 THRU 0L086012

Mercruiser Scorpion 377 0K000656 THRU 0L600314

Mercruiser Scorpion 377 Sterndrive 0L416146 THRU 0M907201

According to this chart the old style injector fits gen 5 and 6

When I look up the fuel rail for a 2000, it's the same part number as a 1995

Made in japan the Keihins are the long earlier version injectors using MEFI 1 up till mid or later 1998 and then the tiny silver bullet MM injectors made in Italy. where used in MEFI 3 year model 1999 - 2001.

Post your engine serial number to see what exactly you have here. year model means nothing. And What ECM do you have - Side mount J connections or front ? Side mount is MEFI 1.

Just to add the Keihins are basically Honda injectors. You can find them at Honda dealerships (I believe Honda owns 80% of Keihin). My Merc and Honda both had Keihin injectors. Kind of funny.