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Marine Products

BLASTER™ II Washdown Pump 12 VDC 3.5 GPM

SHURFLO®’s BLASTER™ II Washdown Pump design was created with a unique over-molded single piece diaphragm, assuring long life and top performance in all marine washdown applications. The BLASTER™ II washdown automatic demand pumps are thermally protected and can run dry without damage. Sealed switch. Ignition protected. Fittings and nozzle included (aftermarket models only).


California residents: see Proposition 65 information


Installation & Operation


Data Sheet / Replacement Parts

 pds 4238-121-X07.pdf



BLASTER™ II Washdown Pump 12 VDC 3.5 GPM

Model Numbers OEM/Aftermarket

4238-121-A07, 4238-121-E07


12 VDC

Dimensions Inches/Millimeters

9.0" x 4.9" x 4.1" [229 x 124 x 104mm]

Flow Rate

3.5 GPM [13.2 LPM]

Amps (Max.)


Shut-Off Pressure

45 PSI [3.1 BAR]

3901 Replacement
Sealed Switch
Sealed Motor
Corrosion Resistant Electro Coated Motor
4 Independent Chambers
Built-In Check Valve
Co-Molded Diaphragm
Self-Priming up to 6 Feet
Dry Run Capability
Thermally Protected
Ignition Protected, CE
Model Number 4238-121-A07

OEM 3.5 GPM [13.2 LPM]

Model Number 4238-121-E07

Aftermarket 3.5 GPM [13.2 LPM]

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