9-33303 Aftermarket Mercruiser Fuel Injector Seal Kit | Sawley’s Select Marine Parts

🔧 Product Description

Sawley's Select Marine Parts Aftermarket MerCruiser Fuel Injector Seal Kit - Part Number: 9-33303

A new aftermarket replacement fuel injector seal kit for MerCruiser V8 MPI engines using the 805225A1 / 9-33100 injector family. This seal kit is used on selected MCM, MIE, Ski and high-performance GM V8 350, 377, 454 and 502 MPI fuel-injection systems where the injector seal diagram specifies 9-33303.

⚙️ Key Features

• Sawley's Select Marine Parts aftermarket injector seal kit

• Replaces Mallory 9-33303

• Recmar aftermarket reference REC9-33303

• Used with MerCruiser injector 805225A1 / 9-33100 family

• Cross-references with Sierra 18-7696 and Walker WK-17056

🔄 Supersession & Cross Reference

OEM Supersession Chain:

• 9-33303 Mallory fuel injector seal kit reference

• REC9-33303 Recmar aftermarket fuel injector seal kit reference

• 18-7696 Sierra-style fuel injector seal kit reference

OEM / Related Numbers:

• 9-33303

• 933303

• REC9-33303

• 805225A1 related MerCruiser injector

• 805226A1 related injector reference in replacement data

• 3855194 related Recmar / GM marine injector reference in replacement data

• 9-33100 related Mallory injector

• 18-7696 related Sierra seal kit reference

• Fuel injector seal kit

• Injector O-ring kit

• MPI injector seal kit

Aftermarket / Verified Equivalents:

• Recmar: REC9-33303

• Mallory: 9-33303

• Sierra: 18-7696

• Walker: WK-17056

• Replacement seal kit for MerCruiser injector 805225A1 / 9-33100

🚤 Compatibility

Commonly used on:

• MerCruiser GM V8 MPI fuel systems using injector 805225A1

Typically suits:

• Engine models:

• MerCruiser 350 Black Scorpion Ski Gen+ V8 - 1997-2001, serial 0K040001 to 0M391599

• MerCruiser MX 6.2L Black Scorpion Ski 377 V8 - 2001-2003, serial 0L005601 to 0M391599

• MerCruiser MX 6.2L Black Scorpion Ski 377 V8 - 2003-2009, serial 0M391750 and up

• MerCruiser 454 Mag EFI 454 V8 - 1994-1996, serial 0F115700 to 0F802349

• MerCruiser 454 Mag EFI Ski 454 V8 - 1994-1996, serial 0F215800 to 0F820099

• MerCruiser 454 Mag EFI Ski 454 V8 - 1996-1997, serial 0F820099 to 0K999999

• MerCruiser 454 Mag MPI 454 V8 - 1996-1997, serial 0F802350 to 0K147349

• MerCruiser 454 Mag MPI 454 V8 - 1997-1998, serial 0K147350 to 0L085399

• MerCruiser 454 Mag MPI Horizon MIE 454 V8 - 1998, serial 0L002200 to 0L086049

• MerCruiser 7.4L MPI MIE 454 V8 - 1995-1996, serial 0F563052 to 0K147349

• MerCruiser 7.4L MPI MIE 454 V8 - 1997, serial 0K147350 to 0K999999

• MerCruiser 7.4LX MPI 454 V8 - 1996, serial 0F602010 to 0K147349

• MerCruiser 7.4LX MPI 454 V8 - 1997, serial 0K147350 to 0K999999

• MerCruiser 502 EFI Gen V 502 V8 - serial 0D840650 to 0F802599

• MerCruiser 502 Mag MPI Gen VI 502 V8 - serial 0F802600 to 0K999999

• MerCruiser 502 Mag MPI Bravo Gen VI 502 V8 - serial 0L017000 to 0L085432

• MerCruiser 525 EFI - serial 0M900146 to 0M953619

• MerCruiser 525 EFI - serial 0M953620 to 0M956326

• MerCruiser 525 EFI - serial 0M956327 to 0M962885

• MerCruiser 525 EFI - serial 0M962886 and up

• HP Range: engine-variant dependent

• Engine Type: MerCruiser GM V8 petrol MPI fuel injector sealing system

• Year Range: approximately 1994 onward depending on engine family

• Serial Note: Match by exact MerCruiser serial number, injector 805225A1 / 9-33100 family, fuel rail, O-ring groove profile and seal kit diagram before installation.

🔌 Function

The fuel injector seal kit seals the injector into the fuel rail and intake manifold, helping maintain fuel pressure and preventing fuel vapour or liquid leakage.

Common signs replacement is needed:

• Fuel smell near intake or fuel rail

• Fuel seepage at injector body

• Rough idle after injector service

• Hard starting after rail removal

• O-rings cracked, flattened or swollen

• Fuel rail pressure drop from poor seal

• Vacuum leak at injector seat

• Replacement required whenever injectors are removed

📦 Condition

• Aftermarket replacement part

• Brand new

• Supplied in original or equivalent packaging