Outdoor Power Equipment Reference

Why this matters

Lawn care + tree service techs use mowers, trimmers, blowers, chainsaws daily. Equipment failure stops the job + costs revenue. The tech who knows basic maintenance + diagnoses delivers reliable service. This is the field card.

Equipment categories

Mowers: walk-behind, riding, zero-turn, robotic, electric.

String trimmers (weed eaters): gas, battery, electric.

Blowers: backpack, handheld, gas, battery, electric.

Chainsaws: gas, battery, electric; bar length varies.

Hedge trimmers: gas, battery, electric.

Edger / lawn edger: gas OR electric; sharp blade.

Sprayer: backpack OR vehicle-mounted; for chemicals + irrigation.

Aerator / dethatcher: gas; pulls plugs / scratches surface.

Sod cutter: gas; specialty.

Wood chipper: gas; specialty.

Pressure washer: gas OR electric; cleaning + paint prep.

Mower types + engines

Walk-behind: push (gas/electric; light yard); self-propelled (gas; medium yard); robotic (battery; small flat lawn). Riding mower: 1/2 - 2 acre. Zero-turn: commercial + larger residential. Reel mower: cylinder blade; premium lawn.

Engine sizes: push 140 - 200 cc; self-propelled 160 - 220 cc; riding 350 - 700 cc; zero-turn 500 - 1,000 cc.

2-stroke: trimmers, blowers, some chainsaws; oil + fuel mixed (50:1 OR 40:1); higher RPM; lighter; use 2-stroke oil + ratio. 4-stroke: mowers, generators, larger chainsaws; separate oil reservoir; lower RPM; more efficient; SAE 10W-30 per OEM.

Common engine maintenance

Daily: visual inspection, oil level (4-stroke), fuel, air filter, tire pressure (riding), belt + blade condition.

Weekly: wash equipment, tighten loose fasteners, lubricate moving parts.

Per 25 hours / seasonally: oil + filter change (4-stroke), spark plug inspection, carburetor adjustment/cleaning, belt + chain tension.

Annually: spark plug replacement, fuel filter, air filter, sharpen mower blade (3 - 5 sharpens before replace), inspect bearings.

Spark plug

Most outdoor equipment: standard spark plug.

Common types: NGK BPMR7A, Champion RCJ8Y, etc.

Gap: per OEM (typical 0.025"; some 0.030").

Replace annually OR per 50 hours OR per use signs:

• Black + sooty: rich fuel mixture OR plug fouled
• White + dry: lean mixture OR overheating
• Wet with oil: oil burning; check rings / cylinder

Carburetor service

Most common issue on small engines: gummed-up carb from old fuel.

Symptoms: won't start, runs rough, runs slowly.

Treatment:

• Drain old fuel
• Add fresh fuel + stabilizer
• Spray carb cleaner into intake
• Pull-start several times
• If persists: rebuild OR replace carb

Carb rebuild kit: replaces gaskets + needle + jet; .

Common cause: storing equipment with fuel in carb.

Fuel + storage

Use fresh fuel: 30-day max for stored equipment.

Stabilizer (Sta-Bil, Sea Foam): extends fuel life to 6+ months.

Drain fuel before long storage: run dry OR drain.

Ethanol-free preferred: ethanol attracts moisture + degrades rubber.

90+ octane: per OEM; some specifically require non-ethanol.

Don't mix gasoline + diesel: damages 2-stroke / 4-stroke distinction.

Trimmers, blowers, chainsaws

String trimmer: engine (2-stroke OR battery) + shaft (curved/straight) + head (bump-feed, fixed-line, semi-auto) + cutting line (0.080" - 0.105" residential). Replace line regularly. Common engine failures: carb gum, spark plug, fuel line crack, primer bulb.

Blowers: backpack gas (commercial); handheld (gas/battery; residential); electric (low-noise, lower power). CFM = airflow volume; MPH = air velocity; combined = cleaning power.

Chainsaws: gas 2-stroke (traditional/commercial); battery (residential + growing pro); electric corded (light use). Bar length 14 - 20" residential; longer commercial. Chain tension per OEM (too tight damages; too loose derails). Chain sharpening when dull. Bar oil before each use. Safety: chaps, helmet with face shield, hearing protection, gloves.

Battery-powered equipment + pressure washer

Battery: lithium-ion shared platforms (DeWalt, EGO, Ryobi, Stihl, Husqvarna). Pro brands Stihl/Husqvarna/Echo. Single-platform commitment. Charging 30 - 60 min; rotate batteries. Storage cool + 40 - 80% charge. Cost 2 - 3x gas; saves on fuel + maintenance. Quiet + emission-free.

Pressure washer: gas (3,000+ PSI) commercial; electric (1,200 - 2,000 PSI) residential. Hot for grease + organic; cold otherwise. Soap injection for chemicals. Tips: 0° red concentrated (dangerous); 15° yellow tight stripping; 25° green general; 40° white wide; 65° black soap.

Common equipment problems

Won't start: old fuel; spark plug fouled; air filter clogged; choke not engaged; fuel line cracked; primer bulb torn. Runs poorly / quits: carb gum; fuel filter clogged; vapor lock (hot); air leak in carb gasket. Won't cut well (mower): blade dull (sharpen); blade bent (replace); drive belt slipping; engine speed low. Excessive vibration: bent blade; worn engine mounts; loose deck bolts.

Sharpening + maintenance schedule

Mower blade: 3 - 5x season; sharpen + balance.

Chainsaw chain: when noticeably dull.

Hedge trimmer blades: annual; specialty file.

Edger blade: each season; replace as needed.

Common equipment install + setup

Mower blade install: torque to OEM spec; balance check.

Chainsaw chain install: correct direction + tension.

Trimmer line install: per head type; correct line gauge.

Belt install: correct routing; tension.

Truck stock + equipment

Spark plugs (common sizes); 2-stroke oil; 4-stroke oil (SAE 10W-30); fuel stabilizer; air filter (common sizes); fuel filter; carb cleaner spray; chainsaw chain (common bar length); mower blades (common deck size); trimmer line (0.080" + 0.095"); bar oil for chainsaw; basic tools (sockets, screwdrivers); battery charger (for cordless batteries).

Safety

PPE per equipment:

• Mower: closed-toe shoes, hearing protection
• Trimmer: eye protection, hearing protection, long pants
• Chainsaw: chaps, helmet, face shield, hearing, gloves, boots
• Blower: hearing protection, eye protection

Don't operate damaged equipment.

Maintain fuel safety: no smoking near fuel; cool engine before refueling.

Customer education (commercial accounts)

Equipment care: customer doesn't see; mention as part of pro service.

Battery + electric trend: lower noise + emissions; differentiator.

Maintenance plan: bundle with service contract.

Common service-call scenarios (commercial equipment)

Mower won't start beginning of season: drain + fresh fuel + carb clean.

Trimmer line keeps breaking: line type, hitting hard objects, weakened line.

Chainsaw chain comes off: tension OR bar issue.

References

• EPA emissions standards (small engine)
• Manufacturer technical data (Honda, Husqvarna, Stihl, Echo, Toro)
• OPEI (Outdoor Power Equipment Institute)
• ANSI safety standards for outdoor power equipment
• Manuall internal: Common Bearings + Lubricants, Common Belts + Pulleys