Mantis 7940 4-Cycle Tiller Review: Twenty-Four Pounds of Honda

The Original Small Tiller, With a Honda

Mantis tillers have been in American gardens for decades because they solved a specific problem: tilling and cultivating between rows and in beds where a full-size tiller cannot go. The 7940 is the current four-cycle version, powered by a 25cc Honda engine that runs on straight gasoline, no mixing. At 24 pounds it carries with one hand, and the finger throttle and kickstand make it easy to use in short bursts.

This review is based on Mantis’s specifications and on the long history of owner feedback rather than on our own research.

Tilling Performance

The serrated curved tines are the Mantis signature. Mounted one way they dig, working down to about 10 inches in prepared soil; flipped, they cultivate the top couple of inches to weed and aerate without disturbing roots. Mantis spins them at roughly twice the speed of conventional tillers, which is what lets a 24 pound machine dig like a heavier one once the tines bite. Owners describe excellent results in vegetable beds, between rows and in borders, and slow going on hard virgin ground where the light machine bounces until it finds purchase.

The Honda Engine

The 25cc four-stroke is the reason to choose the 7940 over the two-stroke Mantis models. It starts easily, idles smoothly, runs on pump gasoline and needs only periodic oil changes. Owners who disliked mixing fuel for the older models are the most vocal fans.

Handling

At 24 pounds the 7940 goes anywhere: up steps to a terrace, into a raised bed, between tomato cages. The finger throttle gives infinite speed control and the kickstand holds it upright between rows. Handles fold for storage and transport.

Build and Support

Made in the USA, with a two-year warranty on the tiller and Honda’s engine warranty, the 7940 has a reputation for lasting decades with basic care. Attachments for edging, dethatching and aerating extend its use.

Common Owner Complaints

Bouncing on hard ground and the narrow path on large beds, both inherent to a compact tiller. Price relative to electric tillers is the other theme.

Maintenance

The Honda engine needs an oil change after the first few hours and then once a season, a clean air filter and fresh gasoline with stabiliser if it will sit. Run it dry or treat the fuel before winter. The tines come off with a single pin for cleaning and for swapping orientation, and a wipe with oil keeps rust away. Owners report engines starting on the second pull after a decade with that routine, which is why used Mantis tillers hold their value.

Alternatives to Consider

The Sun Joe TJ604E is the corded electric choice for beds near an outlet. Greenworks’ 40V cordless cultivator is lighter still for raised beds. For breaking new ground, rent a rear-tine tiller.

Verdict

For gardeners who work beds and borders beyond the reach of a cord and want a tool that will last a generation, the Mantis 7940 is the compact tiller to buy. The Honda engine removes the last annoyance of the design. Just do not ask it to be a field tiller.