The K15 and the K18 are the two core models of our excavator line. They look similar on a spec sheet, but they are built for different jobs. Here is the comparison we walk buyers through every day.
Engine and fuel
The K15 runs a 12 HP single-cylinder gasoline engine - simple, light and easy to service in areas where diesel logistics are a headache. The K18 steps up to a 20.3 HP three-cylinder diesel engine with proven parts availability and strong low-end torque. If you run more than about 15 hours a week, the diesel pays for the difference in fuel and endurance.
Working range
- Dig depth: 1,700 mm (K15) vs 1,800 mm (K18) - close on paper, but the K18 holds that depth in compacted ground without stalling
- Max digging height: 2,580 mm vs 3,200 mm - the K18 loads a standard truck bed or trailer comfortably
- Bucket digging force: 11.5 kN vs 18 kN - rock pockets, hardpan and frozen ground belong to the K18
- Bucket: 0.05 m³ on the K18, matched to its stronger hydraulics
Controls and attachments
The K15 keeps pilot-free, easy-to-learn controls and a mechanical thumb - the right choice for first-time owners. The K18 moves to hydraulic pilot operation, which gives smooth, metered movements all day long, and its hydraulic thumb with stop valve grips and sorts material without leaving the seat.
Which one should you buy?
Choose the K15 for occasional use, tight residential access and lighter budgets. Choose the K18 for daily work, utility trenches, hard ground and any job that lifts real weight. If you are still unsure, send us your job description - we would rather recommend the smaller machine than sell you capacity you will not use.
