Product Description
Maruyama MS40LI 4-Gallon Battery Backpack Sprayer
A 4-gallon rechargeable backpack sprayer with an 18V lithium-ion battery and quick-charge capability. Up to 145 PSI and as much as 2 hours of continuous spraying on a single charge, with no pumping by hand.
Specifications
| Tank Capacity | 4 gallons |
| Battery | 18V 3.0 Ah lithium-ion |
| Recharge Time | 22 minutes |
| Continuous Spray Time | 120 min (medium pressure) / 45 min (high pressure) |
| Max Pressure | 145 PSI |
| Pump | Uniflow pump (differential type) |
| Pump Capacity | 0.39 GPM (1.5 L/min) |
| Motor | DC |
| Fuse | 10 A |
| Dimensions | 9.8″ x 14.6″ x 22″ |
| Weight | 11.7 lbs |
What’s Included
- MS40LI backpack sprayer
- 1 battery
- Primary spray tip (adjustable, cone to pin stream)
- Alternate tip (dual nozzle)
- User manual
Keep a Spare Battery on Hand
Add an extra MS40LI battery so you’re never stuck waiting on a charge in the field.
Priming Your Sprayer
A new MS40LI, or one that has been in storage, may not pump until it’s primed. Press the priming bulb several times to bring liquid to the pump. The bulb is on the left-hand side, between the back pad and the back of the tank. Priming instructions are at the top of page 8 in the owner’s manual.
Caution: Do not run the pump without liquid in the tank. Running it dry can cause pump failure.
Downloads
Specifications
- Weight: 25 lb
- Width: 30 in
- Depth: 10 in
- Height: 14 in





