Stihl HS 60 AV Vintage Trimmer (Service Guide)
The STIHL HS 60 AV is a vintage, two-stroke hedge trimmer, not a chainsaw. Before starting it, confirm the fuel mix and service settings for its exact model revision. Inspect the blade, controls, fuel system, and anti-vibration mounts, then follow the matching manual for starting, lubrication, sharpening, and storage. Stop if a safety part is damaged or missing.
Older gas-powered yard tools can stay in service for years, but age makes correct setup more important. The HS 60 AV has model and regional variations, so advice for a newer trimmer may not fit yours. I treat the machine’s serial number and matching STIHL documentation as the starting point, especially for fuel mix and carburetor settings.
The guide below covers safe checks, common starting problems, blade care, and seasonal storage. It also separates confirmed model-family references from specifications that need verification.
Identify the HS 60 AV and prepare it safely
The HS 60 AV is a reciprocating-blade hedge trimmer. Its blades move back and forth to cut hedge growth; it does not use a chain, guide bar, or chain-oil system. Model-family references commonly list a 25.4 cm³ two-stroke engine, 600 mm cutter blade, and about 4.9 kg dry weight. Check the serial-number-era manual because specifications can vary.
Before maintenance, switch off the engine and let it cool. Fit the blade guard when the machine is not in use. Wear eye and hearing protection, gloves, sturdy footwear, and close-fitting clothing. Clear people, pets, and obstacles from the work area, and keep others well outside the blade’s reach and the area where cuttings may fly.
Check these parts before each start:
- Blade teeth and fasteners: look for cracks, chips, bends, looseness, or binding.
- Guard and handles: confirm that parts are secure and not cracked.
- Throttle trigger and interlock: check that they move freely and return as intended.
- Stop switch: confirm it is intact and accessible.
- Fuel cap, lines, and muffler: look for leaks, damage, or loose parts.
- Anti-vibration mounts: inspect for cracks, looseness, or signs of separation.
Do not run the trimmer if a safety part is missing or a control is defective. Fuel leaks, a sticking throttle, a failed stop switch, or an engine that races at idle require repair before use.
Confirm fuel and starting procedure
Fuel mix is the blend of gasoline and two-stroke oil needed to lubricate the engine. Use fresh unleaded gasoline mixed at the ratio specified by the correct manual or a label on the machine. Do not guess or assume a ratio used by a newer STIHL tool is right for this vintage model. If you cannot verify the ratio, ask a STIHL dealer before running the engine. Never use straight gasoline.
Follow the matching manual for the cold-start and warm-start steps, including choke and primer use if fitted. Place the trimmer on stable ground with the blade clear of the ground and nearby objects. Hold it securely, keep hands away from the blade, and use the specified starting method.
If it does not start, stop and check the cause rather than pulling repeatedly. Repeated attempts with too much choke can flood the engine, while worn fuel lines or stale premix can also prevent a start. Do not pull the starter while the blade is caught in a hedge or against an object.
| Symptom | Safe first check | Next step |
|---|---|---|
| No start after storage | Check fuel age and confirm the specified mix | Inspect fuel lines and follow the model-specific procedure |
| Starts, then stops | Check the fuel cap and visible lines for damage or leaks | Have the fuel system inspected if the fault continues |
| Blade moves at idle | Stop the engine and keep the machine out of use | Have the idle and clutch system checked using correct service data |
| Engine races at idle | Stop; do not keep running it | Seek service before operation |
| Blade binds | Stop the engine and wait for full blade stoppage | Clear the obstruction with a tool, then inspect the cutter |
These checks do not replace service data. Idle speed, maximum engine speed, carburetor settings, and fastener torque values depend on the manual and revision. A tachometer measures engine speed. Do not tune by ear or use generic figures.
Operate the hedge trimmer without forcing it
The cutter bar is the long assembly of moving teeth that trims shrubs and hedges. Keep both hands on the intended handles and maintain a stable stance. Work at a height and reach that let you control the machine; do not stretch or cut from an unstable position.
Cut only material the machine is designed to handle. Avoid fences, wire, soil, and hidden objects. Do not force the blade through an overloaded cut. Contact with rigid material can make the trimmer move suddenly, and a jammed blade may release without warning.
If the blade hits an obstruction or jams:
- Release the throttle and use the stop switch.
- Wait until the blades have stopped completely.
- Keep hands away from the teeth.
- Use a tool to remove trapped material.
- Inspect the blade and fasteners before restarting.
Never pull debris from a live blade assembly. When you finish or move to another area, stop the engine and wait for the blades to stop before setting the tool down.
Clean, lubricate, and inspect the cutter
Blade care keeps the cutter moving as intended and helps reveal damage early. With the engine off and cool, remove sap and debris using the method recommended in the manual. Inspect each tooth for chips, bends, cracks, or unusual wear. If the teeth are damaged or the blade binds, do not try to force it through a cut.
Lubricate the cutter assembly only as directed in the matching manual. The HS 60 AV has no chain-bar oil system, so chainsaw oiling advice does not apply. Do not add lubricant to places the manual does not specify.
Sharpening means restoring the cutting edge while keeping the original tooth shape and spacing. Use the specified tools and tooth geometry, and keep tooth length and clearance consistent. If you cannot confirm the correct method, or the blades are badly mismatched, have the cutter assembly serviced. Incorrect sharpening can leave the blades binding or cutting poorly.
| Condition | What to do |
|---|---|
| Sap or light debris | Clean with the engine stopped and cool |
| Minor dullness, correct geometry known | Sharpen by the matching manual |
| Cracked, bent, or badly worn teeth | Stop using the trimmer and arrange repair |
| Binding after cleaning or sharpening | Do not force operation; have the cutter checked |
| Loose blade fastener | Use the model-specific service procedure and torque data |
Diagnose vintage-tool problems carefully
A symptom points to a place to inspect; it does not prove which part has failed. I start with simple, visible checks, then stop if diagnosis needs model-specific carburetor or engine work. This avoids replacing parts based on guesswork and reduces the risk of unsafe adjustment.
Case study: the trimmer will not start after winter storage. Treat this as a diagnostic example, not a confirmed fault for every machine. First confirm that the fuel is fresh and mixed at the verified ratio. Then inspect visible fuel lines and the cap for leaks or damage. Follow the manual’s starting procedure. If it still will not start, have the fuel system checked rather than changing carburetor settings at random.
Case study: the blade binds after cleaning. Stop the engine and wait for the teeth to stop. Check for trapped debris and visible damage, then clean the cutter as directed. If it still binds, do not sharpen or adjust it by trial and error. A service shop can check blade alignment and clearance against the correct specifications.
Before carburetor work, identify the carburetor fitted to the machine and find its matching service data. Do not remove limiter caps, change emissions parts, or set maximum speed without the specified procedure and a tachometer. A vintage trimmer can have a different carburetor or revision from another HS 60 AV.
Store the HS 60 AV for the off-season
Good storage starts with a cool, clean machine. Remove debris as directed, fit the blade guard, and store the trimmer dry and secure, away from children. Do not put it away while hot or with fuel leaking.
For extended storage, follow the fuel-system instructions in the correct manual. Old premix can contribute to hard starting, deposits, and fuel-system damage. Before using the trimmer again, check fuel hoses and seals for signs of age, cracking, or leakage. If you find a leak, do not start the engine.
A short return-to-service check helps catch problems before trimming:
- Confirm that the fuel mix and starting instructions are correct for the machine.
- Inspect the blade, fasteners, guard, controls, fuel system, and anti-vibration mounts.
- Start only in a clear area and stop if the engine races or the blade moves at idle.
- Arrange service if a control fails, the cutter binds, or the engine runs poorly.
Frequently asked questions
These answers cover common service questions for the vintage HS 60 AV. The machine’s serial number and matching manual remain the authority for fuel mix, settings, and repair steps. If a safety control or fuel part is faulty, do not run the trimmer while you look for a fix.
Is the HS 60 AV a chainsaw?
No. It is a hedge trimmer with reciprocating cutter blades. Chainsaw chain, bar, and felling procedures do not apply.
What engine size does it have?
Model-family references commonly list a 25.4 cm³ two-stroke engine. Confirm the specification for your machine’s serial-number era.
How long is the cutter blade?
References commonly list a 600 mm blade. Check the machine’s documentation because revisions and regional versions can differ.
What fuel ratio should I use?
Use the ratio in the correct manual or on the machine. If you cannot verify it, ask a STIHL dealer. Never use straight gasoline.
Can I use the ratio from my newer STIHL trimmer?
Do not assume so. Verify the HS 60 AV’s specific requirement before mixing fuel.
Why does the blade move at idle?
Stop the engine and do not operate the trimmer. Have the idle and related parts checked with the correct service data.
Does the HS 60 AV need bar oil?
No. It has no chainsaw guide bar or chain-oil system. Lubricate its cutter assembly only as the matching manual directs.
Can I sharpen the blades myself?
Only if you know the specified tooth shape, tools, and clearance. Have damaged or binding blades serviced.
What should I do if the blade jams?
Stop the engine, wait until the blades stop completely, and use a tool to clear the obstruction. Never use your hand on a live blade.
Is it safe to use if the stop switch fails?
No. Do not operate it until the stop switch is repaired and working.
(This article was written by one of our staff writers, Harrison Croft. Visit our Meet the Team page.)
