Neptune Knapsack Power Sprayer, featuring a state-of-the-art 31 cc 4-stroke petrol engine. This advanced sprayer is designed for high efficiency and ease of use, equipped with a 20-25 liter tank to handle extensive spraying tasks. Ideal for applying pesticides, herbicides, and fertilizers, it ensures effective coverage and performance, making it a ...valuable tool for both professional and personal use. 2 stroke & 4 stroke Feature 2-Stroke Power Sprayer 4-Stroke Power Sprayer Fuel Used Petrol mixed with 2T oil Only petrol (20W-40 oil separate add) Maintenance Higher maintenance required Low maintenance Fuel Efficiency Less fuel efficient More fuel efficient Noise Level More noise Less noise, smoother running Starting Easy and quick start Smooth and stable start Weight Lighter in weight Slightly heavier Power Output High power for short duration work Consistent power for long duration work Operating Cost Higher running cost Lower running cost Best Usage Small farms, occasional use Large farms, regular & professional use