The backpack portable MARK-3® is the strongest available lightweight high pressure fire pump and it has been the prefered pump of initial attack crews and forest agencies around the world since 1964.

A truly outstanding and reliable performer, the MARK-3® fire pump is designed to withstand the rigors of fire fighting and it is at the core of most water delivery system in wildland operations.

Always the benchmark in terms of performance, reliability and durability, the MARK-3® benefited from a series of improvements to its key components namely a Nikasil coated cylinder, an impregnated crankcase, and a maintenance-free pump end.

In addition, the improved MARK-3® successfuly passed the USDA Forest Service100 hours endurance test in San Dimas and has been requalified under QPL Number 274-001.

MARK-3® meets or exceeds USDA Forest Service SPECIFICATION 5100-274E.
Qualified under QPL Number 274-001 Emergency rescue equipment
Exempt from emission standards under 40 CFR 1054.660

Order all of your MARK-3® genuine parts on the Online Store


Flow rate at specified pressure
Maximum Pressure: 380 PSI (26.2 bar)
Maximum Flow: 98 US gals/min (371 L/min)
Maximum Head: 878’ (268 m)
78 GPM (295 lpm) @ 100 PSI (6.9 BAR)
65 GPM (246 lpm) @ 150 PSI (10.3 BAR)
38 GPM (144 lpm) @ 200 PSI (13.8 BAR)
Model & Type: WATERAX 185cc, 2-cycle, air-cooled, Nikasil cylinder, decompression switch
Maximum Power: 10 hp (7.5 kW) @ 5,500 rpm
Maximum Torque: 8.9 lb-ft (12 Nm) @ 5000 RPM
Starting System: Recoil starter with backup manual rope starter
Type: Detachable 4-Stage Centrifugal Pump
Intake: 2” Male NPSH
Discharge: 1-1/2” Male NPSH
Weight: 58.3 lbs (26.4 kg)
Backpackable Frame
Drive Unit
Direct Drive
Other specifications
Fuel Connector: Mercury (Standard)
Fuel Tank: Air Transport (Standard)
Thread Protector: Suction: 2" NPSH (Standard)
Thread Protector: Discharge: 1/4-Turn Forged w/ cap (Standard)
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