WATERAX MINI-MARK® WATSON EDITION
Ultra-lightweight 2-stroke high-pressure pump delivering 85 PSI and 102 GPM in an 18 lb package. Backpackable, multi-position capable, with electronic overspeed protection.
The Legend Returns, Lighter Than Ever
The WATERAX MINI-MARK® Watson Edition pays tribute to the original MINI-MARK from the 1990s, known for its lightweight design and reliable performance in initial attack fires. This modern evolution delivers 85 PSI and 102 GPM from a compact unit weighing just 18 lbs—light enough to backpack into remote locations where every pound matters.
Equipped with a 2.3 HP 2-stroke engine and single-stage pump end, the MINI-MARK Watson Edition features an electronic overspeed cutout switch that protects against engine and pump damage during loss of prime conditions. The anodized aluminum pump components and composite corrosion-resistant impeller deliver durability in demanding field conditions.
Multi-position capability lets you run the pump at any angle, while the centrifugal clutch engages the pump end automatically at operating speed. The detachable pump end and integrated carry handle make transport and field service straightforward.
Key Features
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Ultra-Lightweight at 18 lbs
At just 18 lbs (8.2 kg), the MINI-MARK Watson Edition is one of the lightest high-pressure pumps available. The integrated ergonomic carry handle and compact design make it easy to backpack into remote locations.
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Multi-Position Operation
Run the pump at any angle—no restrictions on positioning. The centrifugal clutch automatically engages the pump end at 3,900 RPM, building pressure only when the engine reaches operating speed.
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Electronic Overspeed Protection
The electronic overspeed cutout switch safeguards against engine and pump damage during loss of prime conditions. Protects your investment and keeps you pumping when it matters most.
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Detachable Pump End
Four screws with a 5 mm Allen key release the pump end for easy field service and quick replacement. Minimizes downtime and simplifies maintenance in remote locations.
Performance Specifications
The single-stage centrifugal pump delivers reliable pressure and flow for initial attack, structure protection, and sprinkler operations.
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Pump Performance
Maximum Pressure: 85 PSI (6 BAR)
Maximum Flow: 102 GPM (386 L/min)
Optimal Operating Point: 50 GPM @ 50 PSI
Pump End: Single-stage centrifugal -
Operating Limits
Max Allowable Pressure: 200 PSI (13.8 BAR)
Clutch Engagement: 3,900 ± 300 RPM
Multi-Position: Capable of running at any angle
Protection: Electronic overspeed cutout -
Fuel Autonomy
Internal Tank: 1 hour runtime
External Tank (optional): 20 hours runtime
Fuel Type: 2-cycle premix gasoline
Oil Spec: JASO-FD, ISO-L-EGD certified
Engine Specifications
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2-Stroke Engine
Power Output: 2.3 HP (1.72 kW)
Engine Type: 2-stroke, air-cooled
Drive Unit: Centrifugal clutch
Starting: Recoil starter -
Controls & Features
Throttle: With detents to avoid drift
Shutdown: Push OFF button
Protection: Electronic overspeed cutoff
Choke: Manual with purge bulb -
Physical Specifications
Weight: 18 lbs (8.2 kg)
Design: Compact, backpackable
Carry Handle: Integrated ergonomic
Pump End: Detachable (4 screws)
Pump Specifications
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Pump Construction
Volute & Suction Cover: Foam compatible anodized aluminum alloy
Impeller: Composite corrosion-resistant
Pump Shaft: Stainless steel
Seal: Mechanical rotary -
Pump Connections
Intake: 2" (51 mm) NPSH
Discharge: 1-1/2" (38 mm) NPSH
Compatible: Standard forestry hose and fittings
Foam Compatible: Yes -
Optional Accessories
External Fuel Tank Kit: Extends runtime to 20 hours
Fuel Connection: Mercury connector system
Hoses: Tygon F-4040-A fuel lines
Applications
The MINI-MARK Watson Edition excels in applications where weight and portability are critical factors.
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Initial Attack Firefighting
The ultra-lightweight design lets crews quickly deploy to fire scenes and begin suppression operations. At 18 lbs, the MINI-MARK can be carried by a single firefighter over rough terrain.
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Structure Protection
Ideal for structure protection units (SPUs) where multiple lightweight pumps are needed. Easy to transport, set up, and relocate as fire conditions change.
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Sprinkler Operations
Powers sprinkler systems for structure and perimeter defense. The optimal operating point of 50 GPM @ 50 PSI is well-suited for sprinkler head requirements.
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Tandem Pumping
Chain multiple MINI-MARK pumps together for water relay over long distances. The lightweight design makes it practical to deploy multiple units in remote locations.
Documents & Resources
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Product Brochure
Complete overview of MINI-MARK Watson Edition features, specifications, and capabilities.
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Quick Guide
Fast reference for setup, priming, operation, and basic troubleshooting.
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Owner's Manual
Complete operating instructions, maintenance procedures, parts breakdown, and safety guidelines.
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One Pager
Quick reference sheet with key specifications and features at a glance.
Compare WATERAX Pumps
The MINI-MARK Watson Edition delivers 85 PSI in the lightest package at just 18 lbs—ideal for backpacking and multi-pump deployments. For higher pressure applications, the MINI-STRIKER offers 170 PSI at 13 lbs with a 4-stroke Honda engine. The legendary MARK-3 Watson Edition delivers up to 380 PSI at 100 GPM for maximum firefighting performance in a 44 lb backpackable unit.
Complete Your Setup
The MINI-MARK Watson Edition uses 2" NPSH intake and 1-1/2" NPSH discharge connections, compatible with standard forestry hose and fittings.
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Forestry Hose
Shop Forestry Hose1-1/2" and 1" forestry lay flat hose. EPDM-lined for durability with NPSH forestry couplings for direct connection.
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Fittings & Adapters
Shop FittingsNPSH couplings, wye valves, reducers, and adapters. 2" intake and 1-1/2" discharge compatible.
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Foot Valves & Strainers
Shop Foot Valves & StrainersFoot valves and strainers for drafting from open water sources.
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Sprinklers & SPU Equipment
Shop SprinklersRoof and gutter mount sprinklers, mounts, and structure protection equipment for wildfire defense.
Shop MINI-MARK Watson Edition
MINI-MARK Watson Edition (85 PSI, 102 GPM, 18 lbs)
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MINI-MARK Watson Edition
View MINI-MARKComplete MINI-MARK Watson Edition 2-stroke lightweight high-pressure pump. 85 PSI / 102 GPM. Just 18 lbs with integrated carry handle.
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External Fuel Tank Kit
ContactOptional fuel connection kit extends runtime from 1 hour to 20 hours. Mercury connector system for reliable fuel supply.
WATERAX
MINI-MARK® 2-Stroke Lightweight High-Pressure Pump
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Need Help Selecting a Pump?
Whether you're outfitting structure protection units, building lightweight initial attack kits, or need portable pumps for remote operations, we can help you choose the right WATERAX pump for your application. The MINI-MARK Watson Edition delivers reliable performance at a weight that lets you go anywhere.