NOTE: This is a HIGH pressure pump and has NO THREADS! Not suitable for threaded low pressure. FITS: High Pressure Electric Fuel Pump for Mercruiser V6 and V8 305 350 377 454 502 electronic fuel injection engines. Fits MPI and EFI engines only REPLACES: for Mercury for Marine 861156A1, for Mallory 935433, 9-35433, 9 35433, for Sierra 18-35433, 1835433, 18 35433, 861156-1, 8611561, 861156 1, for Airtex E11004 NOTE: High pressure for fuel injected engines only. Small outlet end is NOT threaded TIPS: This is the fuel pump that is used in the 'cool fuel' assembly. The small outlet is NOT threaded since it is only used in the 'cool fuel' assembly. The low pressure pumps looks like this but the small outlet is threaded and goes in-line. The hi and low pressure pumps look the same except for the threaded or non-threaded small end NOTE: This is a HIGH pressure pump and has NO THREADS! Not suitable for threaded low pressure. Fitment:

Part Numbers for High Pressure Pump:

for Mercury for Marine 861156A1

for Mallory 935433 / 9-35433

for Sierra 18-35433 / 861156-1

for Airtex E11004

It is a High Pressure Pump (42 PSI) with small end NOT Threaded for MerCruiser MPI EFI high pressure fuel injected engines. This fuel pump is used in 'cool fuel' assembly.