3 Best Petrol Post Hole Diggers – Baumr‑AG vs Giantz vs MTM for Fast Fence Posts (AU 2026)
You’ve got posts to set before the weekend wind picks up, clay that sets like brick, and a mate who can only help for two hours. A petrol post hole digger is the difference between 10 holes and 60. Here’s the straight-up comparison Aussies actually need to choose once and get back to work.
Quick picks: best petrol post hole diggers in Australia (2026)
- Best Overall – Baumr‑AG 52–75cc: Smoother gearbox feel and better throttle control for consistent holes in clay and mixed fill.
- Best Budget – Giantz 52cc: Low entry price, gets the job done for weekend fencing if you work smart and keep bits sharp.
- Best for Beginners – MTM 62cc: Easy starts and forgiving torque delivery; less stall-prone for first-timers and small crews.
Prefer no fumes or easier starts? See battery-powered earth augers (2026 guide). Compacting post gravel afterwards? Check contractor-grade plate compactors.
Baumr‑AG vs Giantz vs MTM: comparison table (AU 2026)
| Model/Brand | Engine | Incl. Bits | Weight | Best Use | Est. Price (AUD) |
|---|---|---|---|---|---|
| Baumr‑AG (52–75cc) | 2‑stroke, 1.7–3.0kW | Often 100/150/200mm set | ~9–11 kg (powerhead) | Mixed clay, light shale, repeat use | $249–$499 |
| Giantz (52cc) | 2‑stroke, ~1.7–2.2kW | Varies; 1–3 bits common | ~9–10 kg | Weekend fencing, softer to moderate soils | $179–$329 |
| MTM (62cc) | 2‑stroke, ~2.2–2.6kW | Often 1–2 bits; add-ons available | ~10–11 kg | First-timers, landscaping crews, varied sites | $219–$389 |
Pricing is indicative for AU retailers mid‑2026. Expect regional freight variances.
How to choose a petrol post hole digger in Australia
- Engine cc vs soil: 52–62cc is the sweet spot for fencing and planting in clay/loam. Step to 70–75cc only if you regularly hit dense clay or light shale.
- Bit diameter: 100–150mm for stakes, 200–250mm for standard fence posts, 300mm+ for gate posts/footings. A sharp 200mm bit is the workhorse for most backyards.
- Gearbox + handles: A smoother clutch and cushioned handles save your wrists if the bit snags on rooty ground.
- Extensions: A 500–600mm extension makes life easier for deeper footings without trenching.
- Serviceability: Readily available bits, pins, and clutches matter more than raw specs once you’re 30 holes in.
Baumr‑AG petrol post hole digger review (AU 2026)
Why it stands out
Baumr‑AG units I’ve used feel calmer in the hands when the bit bites. The throttle is less twitchy, and their gearboxes transfer torque without the harsh surges you sometimes get on entry-level rigs. That small refinement means rounder, cleaner holes and fewer mid-hole stalls in hard-packed clay.
Shop 52–62cc petrol post hole diggers (AU) – compare current listings
Real-world use case
On a suburban fence in Brisbane’s older fill, a Baumr‑AG with a 200mm bit punched 30 holes to 600mm before lunch with one refuel. Deeper holes benefited from a 600mm extension, but importantly, the unit didn’t fight back when it clipped old brick fragments—just a slight surge you can steer through.
Pros
- Predictable throttle and clutch engagement reduce wrist shock.
- Bit changes are quick; pins and couplers feel snug, not sloppy.
- Better heat management on longer runs; fewer vapour lock dramas.
Cons
- Priced above bargain-basement kits.
- Some kits exclude larger (250–300mm) bits—budget for add-ons.
Best for
Homeowners upgrading from manual diggers and tradies who value smoother running across mixed soils.
Who should avoid it
If you only need six shallow holes a year in sandy loam, a cheaper unit will likely do just fine.
Giantz petrol post hole digger review (AU 2026)
Why it stands out
Giantz holds the line on price without feeling flimsy when set up right. Keep the bit sharp and let it work at its own pace, and you’ll cut a surprising number of holes between refuels. For infrequent projects, the savings can fund extra bits and an extension—both of which boost productivity more than raw engine cc.
Browse 52cc petrol post hole diggers – budget to mid-range
Real-world use case
On a DIY acreage fence near Toowoomba, a Giantz 52cc with a 150mm bit did pilot holes first, then stepped up to 200mm for final width. That two-pass approach kept it from binding in sticky clay and actually beat a single-pass attempt on a larger auger by a different crew.
Pros
- Lowest upfront cost; easy to justify for one big project.
- Common spares/consumables; plenty of compatible bits and pins.
- Light enough for solo handling, especially with 150–200mm bits.
Cons
- More sensitive to dull bits—sharpen often to keep speed up.
- Vibration creeps in on long stints; take breaks and use gloves.
Best for
Weekend warriors and renovators doing fencing, deck footings, or bulk planting a couple of times a year.
Who should avoid it
Contractors hammering dense clays daily—step up to a higher-spec unit or larger cc if it’s your bread and butter.
MTM petrol post hole digger review (AU 2026)
Why it stands out
MTM 62cc units tend to start easily and deliver torque without sudden spikes. That makes them forgiving when a beginner hits a root or when you’re working uneven ground along old fence lines.
Compare 62cc petrol post hole diggers in Australia
Real-world use case
On a sloped backyard in Wollongong, the MTM with a 200mm bit and a 600mm extension drilled consistent 700–750mm holes for retaining-post footings. It didn’t yank the operator around when the bit grabbed a buried offcut; a controlled back-out and re-entry got it done.
Pros
- Gentle torque ramp-up; less likely to yank when snagging.
- Solid power for 200–250mm bits without feeling overcooked.
- Balanced handles that suit different operator heights.
Cons
- Heavier with fuel and big bits; plan for team lifts on steep sites.
- Some kits ship with basic bits—consider upgrading for long life.
Best for
First-time users, landscaping teams, and anyone drilling mixed soil profiles with the occasional root or rubble.
Who should avoid it
If you need maximum portability or work in tight spaces all day, consider a lighter 52cc or a high-end cordless auger alternative.
Essential add-ons that actually speed you up
These 2–4 accessories pay for themselves in the first day on most jobs:
- 200mm earth auger bit – standard fence posts
Shop Now - 600mm auger extension – deeper footings without trenching
Add to Cart - Hearing protection earmuffs (AS/NZS 1270) – save your ears
Buy Now - 2‑stroke oil 1L – correct mix keeps starts easy
Top Up
Setup and drilling tips for Aussie soils
- Mix fuel spot on: Follow the ratio on the cap or manual. Too rich glazes plugs; too lean runs hot.
- Sharp bits bite faster: Touch up edges with a file every 10–15 holes, especially in clay.
- Two-pass method: Pilot with 100–150mm, then open to 200–250mm—less binding, rounder holes.
- Don’t fight rock: If you hit rubble, reverse, clear, and nibble the edge. For real rock, switch position.
- Compact in lifts: Backfill and compact in 150–200mm lifts. A plate compactor speeds this—see our plate compactor picks.
Cost snapshot (typical AU 2026)
| Item | Low | High | Notes |
|---|---|---|---|
| Petrol auger (52–62cc) | $179 | $389 | Most common fence setups |
| Higher‑cc auger (70–75cc) | $329 | $499 | For dense clay/light shale |
| Bit set (100/150/200mm) | $69 | $189 | Steel quality varies—buy once |
| 600mm extension | $39 | $79 | Depth without trenches |
What to add next (small upgrades that punch above their weight)
- Flow the job: Drill, set, then compact—see plate compactors.
- Going cordless later? Keep petrol for big days, add a quiet option for tight sites: best cordless augers (2026).
- Finishing off: Blast gear and paths after concreting with a unit from our petrol pressure washer guide.
- Garden structures: If your holes are for edging or steps, plan drainage early—see yard drainage solutions.
FAQs: petrol post hole diggers in Australia (2026)
What size auger bit should I buy for standard fence posts?
200mm is the workhorse for most 90–100mm posts. Go 250–300mm for gate posts or when you need more concrete around a post in sandy soils.
Is 52cc enough for clay?
Yes, with sharp bits and a two-pass method (pilot then final). For dense, baked clay or light shale, step to 62–75cc.
How deep can I drill with a handheld auger?
Typically 600–800mm with standard bits; add a 500–600mm extension for 900–1200mm where needed.
Two-stroke fuel mix: what ratio?
Follow the unit’s cap/manual—common ratios are 25:1 or 40:1. Use fresh 2‑stroke oil and measure precisely to avoid hard starts.
Why does my auger keep binding?
Dull edges, too much downforce, or trying to chew full size in one pass. Sharpen, reduce pressure, and pilot with a smaller bit first.
Do I need a 300mm bit?
Only for oversized posts or heavy footings. A sharp 200mm will be faster and less fatiguing for standard fencing.
Petrol vs battery augers?
Petrol wins for continuous, high-demand drilling and larger bits. Battery is lighter, quieter and great near neighbours—see our cordless auger guide.
What’s the safest way to drill solo?
Use 150–200mm bits, let the clutch slip if you snag, and keep feet clear. If ground is rooty, have a spotter and work in short cuts.
Bottom line: which auger should you buy?
If you want a calmer, more controlled digger for mixed Aussie soils, Baumr‑AG is worth the extra outlay. On a tighter budget, Giantz delivers when paired with sharp bits and good technique. If you’re new to augers or value easy starts and predictable torque, MTM strikes a friendly balance.
Whichever way you go, set yourself up with the right bit sizes and an extension now—you’ll finish hours earlier and with rounder, cleaner holes.
Compact backfill properly and, if noise is a concern on future jobs, keep a cordless auger option in mind.
Compare petrol post hole diggers in Australia – current listings