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How to use a Stihl leaf blower safely and effectively

Updated: October 2026

The first minute with a blower can scatter gravel into a border, throw grit towards a window, or flood a petrol engine with the wrong starting routine. Learning how to use a Stihl leaf blower begins before you pull the trigger: clear hazards, fit the correct nozzle and identify the exact power system. This guide covers BGA battery models and BG petrol handhelds for a typical UK garden. If you are still choosing a machine, start with the [Stihl leaf blower comparison](/hub/lawn-and-garden-equipment/stihl-leaf-blower). Keep your model’s manual beside you, because controls, weather protection and starting steps are not identical across the range. If you buy through our links, we may earn a commission at no extra cost to you.

The first minute with a blower can scatter gravel into a border, throw grit towards a window, or flood a petrol engine with the wrong starting routine.

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On this page
  1. 1.Before you pull the trigger
  2. 2.Petrol mix, or the right battery
  3. 3.Where to point the air
  4. 4.Rain, noise and when to stop

Before you pull the trigger

Walk the area before you bring the blower out. Pick up stones, wire, broken glass and hard twigs that could become projectiles, and move toys or lightweight pots out of the airflow. Decide where the leaves will finish: a tarpaulin, a compost bay or one accessible pile. Wear close-fitting clothing, sturdy footwear and eye protection. Stihl’s BGA 57 manual also recommends hearing protection, and battery power does not make that advice irrelevant. Never point the nozzle towards a person, an open window or a parked car. The tube and nozzle should lock. On a petrol BG model, look for fuel leakage. On a BGA model, use only a pack approved for that battery family. Start at the far edge and sweep towards the pile. On a ten-metre path, make two or three piles rather than one long push.

Petrol mix, or the right battery

Stihl says its 2-MIX and 4-MIX engines use a 50:1 petrol-to-oil mixture. For a BG 86, that means 100 ml of suitable two-stroke oil for 5 litres of petrol. Do not use neat petrol. Put both liquids into an approved fuel can, close it and shake. E10 is accepted in Stihl’s UK fuelling guidance. MotoMix is the ready-mixed alternative. Moto4Plus is not the substitute for a 2-MIX blower. Home-mixed fuel may be unsuitable after about 30 days. The BG 86 manual lists a 0.44-litre tank. Fill a cold engine outdoors, then follow that manual’s start sequence. A cordless Stihl removes the fuel can, not the compatibility check. The BGA 57 uses approved AK batteries. An AP pack does not become suitable because it carries the same brand. The buying guide explains AS, AK and AP.
Einhell Einhell GE-LB 36/210 Li E-Solo

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Einhell Einhell GE-LB 36/210 Li E-Solo
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Where to point the air

Fit the nozzle for the debris. Stihl describes a round nozzle as giving a more even spread for ordinary loose material. A flat nozzle concentrates the jet and raises air speed, which is more useful for wet, heavy or stuck leaves. Straight and curved flat accessories fit different models. Hold the outlet low enough to get under the leaf edge, without scraping the tube along the ground. On dry leaves over paving, begin at a lower setting. Starting at full force can send the pile past its destination and strip loose bark or decorative gravel. Work in layers when leaves are deep. If a wet mat will not lift, stop repeating the same long blast. The wet leaves page explains where a small cordless machine reaches its limit. If output drops, switch off and remove the battery, or isolate the petrol tool as the manual requires, before you inspect it.

Rain, noise and when to stop

Wet leaves and wet weather are separate questions. The BGA 57 manual says not to use that model in rain. The BGA 86 carries an IPX4 rating, which indicates splash protection and does not justify immersion, puddles or use in a downpour. A short session can still disturb a neighbour. Hearing protection remains sensible at home. Workplace noise duties are a different regime from a householder’s job. Stop a petrol blower before refuelling and let it cool. A split fuel line, a shattered casing or a machine that repeatedly fails to restart needs a Stihl dealer or a competent repairer. A blower is not a disposal method. Do not push debris into the road, a drain or a neighbour’s garden.

Common questions

What petrol mix does a Stihl BG 86 take?
Stihl’s UK guidance specifies 50 parts petrol to one part suitable two-stroke oil for 2-MIX engines. One practical batch is 5 litres of petrol with 100 ml of oil. Mix it in an approved can and shake it. Do not guess the ratio in the blower tank.
Can I use neat petrol?
No. A BG 86 has a 2-MIX engine and needs oil in the fuel at the specified ratio. Neat petrol removes lubrication and can cause serious engine damage. Ready-mixed Stihl MotoMix is an alternative to preparing your own 50:1 batch.
Can I use a BGA 57 in the rain?
No. Its manual says not to use it in rain. Wet leaves left from earlier weather can be tackled once conditions are suitable, but that does not override the rain restriction. Do not transfer the BGA 86’s IPX4 rating to the BGA 57.
Do I need ear defenders at home?
Hearing protection is a sensible precaution and is recommended in Stihl’s BGA 57 manual. Workplace exposure thresholds apply to employers. They do not automatically define a householder’s safe session. Follow the product manual and limit unnecessary exposure. See also the UK lawn mower noise rules for how councils treat garden-machine noise.
What should I do if the blower will not start?
Check the manual’s start sequence, the battery charge, or correctly mixed fresh fuel first. Stop if you see a damaged pack, a split fuel line, a leak or a broken housing. If the tool still will not restart after those checks, take it to a dealer rather than defeating a switch.

Related pages

Stihl battery blower or petrol

Stihl leaf blower

Best Stihl leaf blower for the job in front of you

Stihl leaf blower buying guide: battery family first

Leaf blower for wet leaves: nozzle before more power

Sources

Sources checked for this comparison; last retrieved on 16 October 2026.

  1. Stihl UK, leaf blowers, blowers and vacuum shredders (retrieved 16 October 2026)
  2. Stihl UK, BG 56 petrol blower (retrieved 16 October 2026)
  3. Stihl UK, BGA 86 (retrieved 16 October 2026)
  4. Stihl UK, AK battery system (retrieved 16 October 2026)
  5. Stihl BGA 57 instruction manual (retrieved 16 October 2026)
  6. GOV.UK, noise nuisances: how councils deal with complaints (retrieved 16 October 2026)
  7. HSE, noise at work regulations (retrieved 16 October 2026)
  8. Stihl UK, fuel mix for 2-MIX and 4-MIX engines (retrieved 16 October 2026)