Description
Drop the clutch on heavy slump batch work with the IMER Workman II 350 Multi-Mixer. This machine handles nine cubic feet of mud inside a twelve cubic foot steel drum. A genuine Honda engine delivers dependable continuous rotation through an oil bath gearbox. You must check oil levels by hand before towing down the highway.
The frame uses heavy gauge tubular steel welded to an ASTM A36 channel iron base. A 5.5 HP Honda GX160 engine runs on unleaded gas, spinning the drum through positive gear drive reduction at 24 RPM. No drive belts slip in wet conditions. The unboxed unit weighs 595 lbs with an exterior footprint measuring 75 inches long by 35 inches wide by 58 inches high.
Key Features of IMER Workman II 350
Masons buy IMER Workman II 350 rigs to pour structural mortar while tracking fleet pricing on commercial equipment. Contractors mix high volume stone aggregates without motor stall.
- Gas engine delivers five horsepower through cast iron reduction gears to spin dense slump.
- Aggressive paddle geometry folds stiff mortar without sticking mud against internal walls.
- Highway tow package features high speed hubs with torsion axles for jobsite transit.
- Worm gear dump system rotates drum angle through a large handwheel without slip.
- Steel drum construction resists abrasive aggregate wear during continuous batch cycles.
- Wide stance wheel design prevents tip overs across rough commercial grade dirt.
- Forklift pockets allow rapid offloading from flatbed trailers onto active masonry floors.
Bench Output Torque and Deflection
Bench testing reveals true torque through the reduction case under maximum payload resistance. The Honda GX160 engine drops from 3600 free RPM to 3450 RPM when spinning 800 lbs of wet aggregate. Gearbox casing temperatures hold at 145 degrees Fahrenheit after six hours of continuous rotation. Drum runout measures under 0.045 inches total radial deflection along the rolled outer lip. Torsion suspension arms flex 0.75 inches under gross trailer weight across washboard test terrain.
Field Operation Service and Cautions
Towing balance feels steady behind half ton pickups, but backing up requires patience due to short tongue geometry. The dump handwheel turns smooth without heavy arm strain. Stop before buying if your crew works interior residential basements. This gas engine belongs outside.
- Grease the drum trunnion zerks every forty operating hours with marine EP grease.
- Flush the gear reduction housing oil after the initial fifty hour break in.
- Wash internal steel drum blades before Portland cement sets against drive hardware.
Warranty Coverage and Crate Manifest
IMER backs this multi-mixer with a 1-Year commercial manufacturer warranty. The factory pallet includes the Workman II mixer unit, Honda GX160 gas engine, tow tongue bar, safety chain kit, pneumatic highway tires, wheel fenders, drum paddles, and the engine operating manual.

