Husqvarna 122C trimmer Parts

The Husqvarna 122C gas line trimmer uses a 21.7 cc 2-cycle engine. This engine size helps balance cutting power with lighter weight for routine trimming and edging around a yard.

Quick spec snapshot

Item	What to expect on the Husqvarna 122C
Engine displacement	21.7 cc
Engine type	2-cycle gas
Fuel	Gasoline mixed with 2-cycle oil

Why cc matters on a line trimmer

Engine displacement (cc) is a simple way to compare power potential between trimmers. In general, higher cc can handle thicker weeds more easily, while lower cc often feels lighter and is easier to control for longer sessions.

Tips to get the best performance from a 21.7 cc trimmer

• Use fresh fuel mix; old fuel is a top cause of hard starting and poor throttle response.
• Keep the air filter clean so the engine can breathe under load.
• Replace worn trimmer line and keep the cutting head clear of wrapped grass.
• Check the spark plug condition if it bogs down or misfires.
• Follow the correct starting steps and choke settings listed in the 122C owner's manual.

Parts help for the Husqvarna 122C

When you are ready to replace maintenance items (like filters, fuel lines, primer bulb, spark plug, or trimmer head components), we recommend matching parts by the full model number 122C to avoid fit issues. You can also search by model on Sears PartsDirect to find the correct diagrams and part listings.

Last updated: February 2026

The Husqvarna 122C gas line trimmer uses a 2-stroke engine, so it runs on a gasoline and 2-cycle oil mix (not straight gas like many 4-stroke trimmers). For the correct fuel mix ratio and starting steps for model 122C, follow the owner's manual.

How to tell 2-stroke vs 4-stroke on the 122C

A 2-stroke trimmer like the Husqvarna 122C typically has these traits:

• No separate oil fill or dipstick for engine oil
• Fuel is premixed (gas + 2-cycle oil)
• A primer bulb and choke lever are commonly used for cold starts
• Exhaust note is usually higher-pitched than many 4-strokes
• Maintenance focuses on the spark plug, air filter, and fuel system

Fuel and oil basics (what to do)

Use these best practices to avoid hard starting and poor performance:

• Mix fresh unleaded gasoline with 2-cycle engine oil at the ratio specified in the owner's manual
• Use a clean, approved fuel container and shake the mix before filling
• Do not use old fuel; most small engines run best on fuel used within 30 days
• Keep the air filter clean; a restricted filter can make the engine run rich
• If it bogs or won’t idle, inspect the spark plug and fuel filter/lines

Quick comparison: 2-stroke vs 4-stroke trimmers

Feature	2-stroke (Husqvarna 122C)	4-stroke
Fuel	Gas + oil mix	Straight gas
Engine oil	Mixed into fuel	Separate crankcase oil
Weight	Often lighter	Often heavier
Routine upkeep	Plug, filter, fuel system	Plug, filter, fuel system + oil changes

Why it matters

Using straight gasoline in a 2-stroke trimmer can quickly cause poor running and internal damage. Using the correct mix ratio helps the 122C start easier, idle smoother, and last longer.

If you need replacement parts for your Husqvarna 122C, we list model-matched parts on the trimmer parts page, and you can also search by model number on Sears PartsDirect.

Last updated: February 2026

The Husqvarna 122C gas line trimmer typically uses trimmer line in the 0.065 inch to 0.095 inch range, depending on the cutting head installed and the type of trimming you do. For the exact line size and loading method for your specific head, follow the specs in the 122C owner's manual.

Recommended line size by job

• 0.065 inch: light trimming, edging, best runtime and easiest feeding
• 0.080 inch: general-purpose trimming (most common choice)
• 0.095 inch: heavier weeds and thicker grass (more load on the engine)

Quick fit check before you buy line

• Confirm your trimmer head model and its max line diameter
• Use round line for best feeding in most bump-feed heads
• Avoid oversized line; it can jam the spool and reduce RPM
• If the line keeps breaking, step up one size or switch to a tougher line type
• If the head will not feed, step down one size and re-spool neatly

Line size comparison

Line diameter	Best for	Tradeoff
0.065 in	light grass, detail work	wears faster in thick weeds
0.080 in	everyday trimming	slightly more fuel use than 0.065
0.095 in	heavier growth	more vibration and engine load

Why it matters

Using the correct trimmer line diameter helps your 122C maintain cutting speed, reduces spool jams, and prevents extra strain on the clutch and engine. The right size also improves line feeding and cut quality.

Ordering tip

We recommend matching line diameter to the cutting head specs first, then shopping by model number to avoid returns. You can also search by model on Sears PartsDirect to find the best-fit replacement items for your Husqvarna 122C.

Last updated: February 2026