Questions & Answers

Edgers, Tillers, Blowers, Engine Drills, Drill Attachments, Wood Augers

Please first read your instruction manual, as most of the information you require is contained in the manuals.

To find the manual go to Manuals and Parts List and select.

Do not use ethanol based fuel as it can absorb water if not used within a short period. Use any petrol/gasoline other than ethanol based fuels. Ethanol can also affect fuel lines (shrink) or harden or soften engine and carby gaskets. Worn, split, stiff or leaking fuel lines to be replaced immediately.

What about using fuel modifiers?
Currently we do not have information or experience using these products.

Use 50/1 grade, quality two stroke oil available from service dealers or large hardware stores – with built in measuring amount.

If you happen to make a 25 or 30 to 1 mix, it is ok to use, but long term use will carbonise the spark plugs, and exhaust. Many manufacturers recommend this mix for first few hours of operation to run motor in.

Measure amounts for 40:1 is 100ml oil for four litres of petrol, or 80ml oil for one litre of petrol for 50/1 fuel mix.

Always use a funnel or pouring nozzle into fuel tank of engine to reduce fuel spills over motor etc.

Honda recommends the following – Detergent oil, SAE10W-30
Change oil every 20 hours, that is, weekly if engine is used 4-6 hours per day. In very hot and dusty conditions change more frequently.

If fuel is left in the petrol tank for long periods it could become thick, sticky and clog up fuel filters, lines and carburettor components. Long term non-use can cause certain fuels to react with metals, eg. brass in carburettors or filters.

Empty and clean out fuel tank. Refill with new clean fuel/mix with 2 stroke oil (50:1 grade) at 40:1 mix. For 4 stroke use straight unleaded petrol (no oil mix).

Press Primer 20-30 times to clear lines and restart.

If it fails to start take to a service dealer.

For further details visit our “Engine Fault Diagnostic Chart” in the “Download Manuals” section.

Clean and oil the air filter regularly according to use
Use quality non-ethanol based unleaded gasoline 50:1 mix for 2 stroke engine (using 50:1 grade
2-stroke oil), with 80ml oil to 4 litres petrol and quality 4 stroke oil in 4 stroke engine. Use non-ethanol based gasoline.

If you are not going to use the unit for a period of time, eg. not within the next 3 – 4 months, drain fuel from tank. Start motor and allow it to run until it stops to clear fuel from carburettor.

Keep inside Edger blade cover clean. Also, Tillers under the tine covers.

After 2 or 3 years have your dealer check fuel lines and replace if necessary, check air and fuel filter for cleanliness and damage and ensure petrol cap is sealing correctly, no leakage. They will also test and run unit and adjust carburettor if required.

Unfortunately you did not follow the instructions, did not allow blade to spin freely and you damaged the unit.
1. Take to dealer
2. Follow these instructions –

1. Squeeze excess oil out of filter element.
2. Excessive oil in fuel mix causing “spit back” through carburettor to inside of filter box.
3. Spilling fuel over fuel tank when refuelling. The excess fuel is sucked up through air cooling system on some models and through filter box excessively depositing fuel/oil mix on air filter.

Problem Engine will not run or runs and stops
Cause 1. Ignition switch is OFF.
2. Choke ON.
3. Partially empty fuel tank.
4. Primer bulb not pushed enough times.
5. Engine is flooded.
6. Dirty or blocked fuel or air filter.
7. Incorrect jet adjustment.
8. Electric models, motor does not switch on.
9. Petrol cap valve closed
Action 1. Ignition switch to be in run position.
2. Push choke off (down).
3. Fill tank.
4. Press primer bulb fully and slowly 5/10 times.
5. Use correct start procedure.
6. Clean or replace fuel or air filter.
7. Re-adjust jets.
8. Check switch and cables. (Item 24)
9. Clean with compressed air or replace.
Download manuals. Go to and click on 776 PDF “Engine Fault Finding Diagnostic Chart”.


A good time to change your blades is when you reach the 2 marker holes in the blade. Use only genuine Atom blades, part number 43105, which are made from a special spring steel to absorb hits on concrete and to reduce impact through gear box system. See also (22).


Use of non-genuine ATOM parts can damage gear box and voids any and all warranty.

These types of blades should NOT be used on any model Atom Lawn Edger due to –

  • heavy mass weight, thickness of blade/out of balance, warping creating vibration and overloading of the gear mechanism of Atom Edgers.

These blades do not absorb shock, which is taken by the Edger gear system and subsequent damage.
A safety issue arises as solid one piece blades are heavier and take longer to stop spinning when motor is turned off or reduced to idle due to their heavier weight and flywheel effect.

Atom twin Cross Blades absorb shock and excessive loading and have been proven over 15 years not to damage the Edger gear system

Beware of blades advertised as Atom Blades, or “superseded by”, “replaces”, etc being “passed off” as Atom Blades. This is a trademark infringement, and are false and misleading statements.

Atom Edger Blades are supplied in a sealed white plastic pack branded ATOM with clear instructions on “How to fit” and promoting other Atom products on the reverse side, except for the old yellow bodied Atom Electric Edger which are in a yellow plastic pack. Any other packaging is not an Atom product. Non-packed Atom blades are not a genuine Atom product. See (22) and if used on Atom Edgers will void the warranty.


Unless used very excessively in professional work, experience has shown it is not necessary during the life of the machine. Special hardened spiral gears require minimum lubrication. You can top up using Part number 43227 Grease Bottle purchased from your local Atom dealer, or any quality lithium based grease. Remove grease access screw on side of casing and apply 3 squeezes of the bottle. Do not use synthetic grease red or blue in colour.

All units when they leave the factory are fully filled with grease. Excessive grease when assembled or oil showing on the casing joint is normal. Gear box design ensures it will never be empty of lubrication.

Follow instructions on Atom packet.

Some early models have an additional small washer under nut and if this is not refitted then the blade cannot be tightened.

Only use genuine Atom blades.

If available, use an impact wrench for quick & easy replacement.

You are digging too deep. Use No 3 position on wheel height arm adjustment. Also, check blades are fitted correctly – see (22)

See ‘Easy to Edge Instructions’ above, (6).

Check power supply. Use correct industrial type lead, check if household earth leakage switch is working correctly. Throttle cable to switch on motor may require adjustment. Adjust throttle cable as follows –


1. Loosen 2 screws a little on side cover. (Do not remove cover)

2. Pull outer casing of black throttle cable outwards of handle
2 or 3mm and retighten 2 screws.

3. Plug in motor and check it switches on. If motor starts
without throttle trigger being pulled on, the outer cable
has been pulled too far out, readjust by sliding outer
cable in a little.

All small gasoline engine products vibrate a little.
Excessive vibration can be cause by –
1. Non-genuine blades fitted (out of balance). See (22)
2. Using non-genuine blades not designed for Atom Edgers. See (22)

(Also refer to 20 – When Should I Change my Atom Blades)

3. Loose or incorrectly installed clutch drum.
4. Worn or broken clutch shoes.
5. Broken motor housing.
6. Worn or overheated clutch assembly, see (6).

Action – Inspect all above carefully and replace and install correctly with new parts.

New gears after assembly require some edging work to settle in. Noise will reduce after 10 minutes edging. A little noise is acceptable and not harmful..


Tines can be used until very little of the turned end section is left.

Retighten tines as follows. Ensure all washers are in place.

WARNING Incorrect assembly sequence on parts missing may cause blade system to lock up.

On production after December 2013, a grease filling screw is located under tine cover on the top of the body above tine shaft. Early models not fitted with filling access. A 5mm hole can be drilled through casing as shown towards centre and down towards shaft. Drill slowly about 20mm. This hole will allow grease to flow through to gear area. Us a suitable screw as a plug to seal hole.

33.1 Very hard or rocky ground – area to be cultivated should be broken up with a larger machine. The Atom Tiller is not designed for breaking up virgin ground.33.2 Using Tiller and not following instructions as follows

All tillers vibrate a little in use, more frequently in rough stony ground. Check that tines are not covered in plant material.


The Atom Airlift Blowers are very powerful and force out a great amount of air.

It is not necessary to use the second extension
tube or fish tail.

Use the blower as shown. When blowing and cleaning
up don’t loiter, keep moving forward as the Atom blower
is very powerful. Less weight – up to 1kg lighter when used
as illustrated due to its strong AIRLIFT® air blast, easier to use,
more convenient to handle, does the job quicker and easier
to store.

The Blower with vacuum attachment is only designed to pick up leaves and light, small litter.

It is not designed to pick up stones, pebbles, sticks, etc. These larger objects may damage fan blades and damage the unit.

See instructions in Blower Accessory Manual

Go to “Find Manuals” and scroll down to Blower Attachments.


1. Problem Will not drill – failing to follow operator owner instruction manual.
Cause Not reading or instructing other users on correct use of drill unit.
Action Read manual.
2. Problem Safety issues
Cause Not following manual.
Action Read manual.
3. Problem Auger will not turn at all.
Cause Blunt auger, must be sharp especially for large holes. Always when drilling, drill 50mm then reverse out to clean shavings from hole. Recommence drilling.
Action Sharpen – see instructions below.
4. Problem Drill unit appears not to reverse auger to clean out hole of shavings.
Cause 1. Type of timber soft so auger does not grip to allow unit to reverse.2. Reverses and unjams very quickly. Very hard to see instant automatic reverse changing to forward drilling. (R. H. rotation)
Action Small diameters to 13mm (5/8”) may cause this problem. Drill and reverse every 50mm.
5. Problem Jumping out of gear and tear
Cause Worn clutch dogs. Blunt auger.
Action Replace.
1. Problem Chain stretched, chain jumping off (drill attachment).
Cause “Breaking in of chain” instruction not being followed.
Action Follow instructions. Re-adjust chain frequently during first few minutes of operation and thereafter re-tension each period of use.
2. Problem AUGER-STOP system activates too early (drill attachment).
Cause 1. Incorrect adjustment.2. Large auger.3. Blunt auger.4. Incorrect type of auger.
Action 1. Re-adjust.2. Maximum auger size 1¼”.3. Sharpen, see (71).4. Use correct type. Atom auger with two side cutting edges is best.
3. Problem Safety issues. Not using equipment correctly with possible injury to operator.
Cause Not reading manual. Tampering or resetting safety mechanism, altering equipment or using non-Atom recommended parts.
Action Do not take risks when using equipment. Read manual and ensure you understand all operating instructions. Before each work period check Auger-Stop mechanism by activating manually. Ensure it is working correctly, not bound up by dirt or wood chips, etc.
4. Problem Too much oil on chain.
Action Re-adjust oiler on chain saw or use heavier grade oil if no oil adjuster
5. Problem Chain wear
Cause Not enough oil on chain. Wrong oil, do not use sump oil.
Action Use quality chain saw oil.
6. Problem Auger will not turn at all.
Cause Not enough power in chainsaw. Check carby adjustment tune motor. Blunt auger or worn out, not cleaning hole of wood chips by reversing and cleaning holes every 50mm or less.
Action Sharpen auger or replace.
7. Problem Breaking safety pins (drill attachment).
Cause Overloading, Auger-Stop adjustment not set correctly or tampered with. Locked off.
Action Check size of power head, sharpness and type of auger. See also (2) above. Use correct Pin, P/N 40907 “UNBRAKO BRAND” 3/16” x ½”
8. Problem Broken pinion or crown gear teeth.
Cause General overloading over a period of time. Blunt augers. Excessive powerful power head being used, eg. over 65cc.
Action Replace gears and observe the “cause”. Use smaller power head.

1. Sharpening Auger Bit with straight cutting edge.Use a small half round and flat one side file.

Snap the non-toothed end of the file with a pair of pliers or
in a vice. Secure the auger in a vice as close to the end as
possible. Only file the inside edges. Only use the end of the
file with short 13mm (1/2”) strokes. When the file end
becomes dull, break enough of to get a fresh filing edge.

If the correct sharpening procedure is followed the cutting
edges will be as sharp as your saw chain teeth. Once they
become dull they should be resharpened as described.


The best Wood Auger design is Atom Auger with 4 cutting edges as shown below.

2. Atom Wood Augers with exclusive Curved Cutting Edge Geometry.


1. Warranty three months from date of purchase.2. Augers are consumable items and cannot be expected to last forever.

1. If you know the saw chain pitch of chainsaw to be fitted refer to column B. Make your selection and quote model number adjacent in column A.

2. If you do not know saw chain pitch, measure tips of two drive links of your saw chain (See fig 1) and check chain pitch fig 2. Download scale image at 100%.

3. To check whether chain is 3/8. or 3/8LP (low profile, Picco *) check cutting teeth height with gauge in fig 3.

    A  B          
All Professional Models   Series Model Number Pitch   Chain Part   No. Gear Ratio Sprocket Diameter Sprocket Part No. Power Head Size Up To
Low gearing best for professional, fencing, drilling large diameter holes 7500 37583 3/8 40534 8:1 88mm 40854 50-60cm
7500 37584 3/8 40529 11:1 112mm 40853 50-60cm
7500 37585 0.404" 40949 7.6:1 109mm 40857 40-60cm
7500 37586 3/8 LP 40529 11:1 112mm 40853 30-50cm
7500 37587 0.325 40530 11:1 109mm 40852 30-50cm
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    Product of the Year

Continuously manufactured with updates since 1962