Craftsman 358791590 line trimmer Parts

For the Craftsman 358791590 gas line trimmer, we use 0.095 inch (2.4 mm) diameter trimmer line. This size matches the trimmer head and feed system described in the owner's manual, and it helps prevent poor feeding and premature head wear.

Recommended line size and length

The manual calls out these line specs for normal line replacement:

• Diameter: 0.095 inch (2.4 mm)
• Line type: nylon trimmer line (do not use wire, rope, or string)
• Typical reload length: 15 ft (4.5 m) when winding line onto the spool

If your line is too thin, it can feed inconsistently and break more easily. If it is too thick, it can jam the spool and overload the cutting head.

Quick compatibility check (what to match)

Use this checklist when buying or loading line:

• Match the diameter to 0.095 inch
• Use round nylon trimmer line intended for bump-feed heads
• Keep the line ends even and routed through the guide slots/exit holes
• Replace worn head parts if the line keeps tangling
• Keep cutting line at the proper length during use

Parts that commonly relate to line fit and feeding

If the line will not feed smoothly, the spool or cover is often worn, cracked, or packed with debris. These model-matched parts are commonly involved:

Symptom	What to inspect	Model-matched part option
Line will not advance	Spool binding, line wound wrong	Spool 596585805
Line tangles or pops out	Cover tabs worn, debris in head	Cover p25 545003365
Excess vibration at head	Housing cracked or warped	Line trimmer cutting head housing 537419302

Why it matters

Using the correct 0.095 inch line helps your Craftsman trimmer cut efficiently while reducing clutch load, head wear, and line breakage. It also keeps the bump-feed mechanism working the way it was designed.

You can order the parts listed above from the parts list for your model, or search by model number on Sears PartsDirect.

Last updated: February 2026

To replace the cutting line on your Craftsman gas line trimmer model 358791590, remove the trimmer head cover and spool, clear out old line, then wind 15 ft of 0.095 in (2.4 mm) line evenly (no overlap). Re-route the ends through the cover and snap the head back together; see the 358791590 owner's manual for diagrams.

Before you start

• Shut the engine off and let it cool
• Disconnect the spark plug boot
• Wear gloves and eye protection
• Use only 0.095 in (2.4 mm) trimmer line (never wire, rope, or string)

Line replacement steps (spool head)

1. Press the tabs on the side of the trimmer head; remove the cover and spool.
2. Remove any remaining line; clean dirt and debris from the cover and spool.
3. Cut 15 ft (4.5 m) of line.
4. Bend the line at the midpoint; snap the bend into the center slot on the spool.
5. With a finger between the two strands, wind both lines clockwise, evenly and firmly.
6. Set the lines into the guide slots.
7. Feed the line ends through the exit holes in the cover.
8. Place the spool in the cover; make sure the line is not pinched.
9. Reinstall the cover and spool onto the head; push until it snaps in place.

If the line keeps tangling or will not feed

Symptom	Most common cause	Fix
Line jams	Overlapping wraps	Rewind with even tension and separated strands
Line will not advance	Line pinched or not in guide slots	Re-seat line in guide slots; reassemble carefully
Head parts won’t snap on	Worn spool or cover	Replace the spool 596585805 or cover p25 545003365

Why it matters

Even wraps prevent binding inside the spool so the bump-feed releases line smoothly and the head wears normally.

If you need replacement parts for model 358791590, order from the model parts list or search by model number on Sears PartsDirect.

Last updated: February 2026

When your Craftsman 358791590 gas line trimmer dies as you squeeze the throttle, it is usually a fuel mix issue, restricted airflow, or fuel delivery restriction that shows up under acceleration. Start with fresh 40:1 fuel, then check the air filter, fuel lines, and carburetor.

Quick checks that fix most “dies when I give it gas” problems

• Mix fresh fuel at 40:1 (3.2 oz 2-cycle oil per 1 gallon unleaded gas) and refill.
• Inspect fuel lines for cracks, soft spots, loose connections, or collapsing under suction.
• Check the air filter; clean or replace if dirty.
• Make sure the trimmer head is not binding (excess drag can bog the engine).
• Warm the engine and confirm it idles steadily before testing throttle response.

Fuel and air basics for model 358791590

This model is designed for unleaded gasoline mixed with synthetic 2-cycle air-cooled engine oil at 40:1. Old fuel or the wrong ratio commonly causes bogging or stalling when you open the throttle. For the exact fueling and safety steps, use the owner's manual.

What to verify	Target	If it is wrong
Gas	Unleaded	Poor acceleration, stalling
Oil	2-cycle air-cooled	Fouled plug, low power
Ratio	40:1	Bogging, smoke, overheating

Fuel delivery problems to look for

A trimmer that idles but dies on throttle often cannot get enough fuel quickly.

• If you smell fuel or see wet spots, replace the fuel line, large 530069216.
• If fresh fuel and good lines do not help, the carburetor is often restricted; replacing the line trimmer carburetor 530071811 restores proper metering.

Why it matters

Stalling on throttle can indicate a fuel leak, a lean condition that reduces power, or a carburetor problem that worsens over time.

Last updated: February 2026

For the Craftsman line trimmer model 358791590, the manual focuses on fuel mix and maintenance and does not call out fuel hose ID/OD. The reliable way to get the correct size is to match the replacement fuel line to the model parts list and route it exactly as shown in the 358791590 owner's manual.

How we size the correct fuel line

Fuel line fit is determined mainly by ID (inside diameter) for sealing on fittings and OD (outside diameter) for passing through the tank grommet and chassis openings.

• Match the replacement to model 358791590 (not by “universal” size)
• Replace any line that is stiff, cracked, or swollen
• Replace all fuel line sections at the same time if more than one is used
• Make sure the line seats fully on the tank pickup and carburetor/primer fittings
• Route the line to avoid kinks, sharp bends, and rubbing

A model-compatible option listed for this trimmer is the ayp lawn & garden equipment fuel line, large 530069216.

Quick fit checks (no measuring tools needed)

Use these checks after installation:

• Line pushes onto the fitting with firm hand pressure
• No seepage at the tank, primer bulb, or carburetor connections
• Primer bulb firms up and returns normally
• Line does not slip off when priming
• Engine does not starve for fuel at full throttle

Typical fuel line sizes (reference)

These ranges help you sanity-check what you have on many 2-cycle trimmers:

Line type	Typical ID	Typical OD	Common use
Small supply/return	1/16 in to 1/8 in	1/8 in to 3/16 in	Tank to carb/primer
Larger section	1/8 in to 3/16 in	3/16 in to 1/4 in	Through grommet or to primer

Why it matters

A loose line leaks and causes hard starting; a tight or undersized line restricts fuel flow and makes the trimmer run rough. Correct fit keeps fuel delivery steady for the 2-cycle engine.

If you need additional parts beyond what is listed for model 358791590, search by model number on Sears PartsDirect.

Last updated: February 2026

To unflood your Craftsman 358791590 gas line trimmer, stop adding fuel and clear the cylinder by running with the choke off and the throttle held open while you pull the starter. Once it fires, let it idle briefly to stabilize the fuel mixture.

Safe unflooding steps (2-cycle)

• Move the ON/OFF switch to ON.
• Set the choke to OFF/RUN (no choke).
• Hold the throttle trigger wide open.
• Pull the starter rope 5 to 10 times until it pops or starts.
• If it still will not start, remove the spark plug, dry it, pull the rope a few times to vent the cylinder, then reinstall.

Quick checks that prevent repeat flooding

• Use fresh, properly mixed 2-cycle fuel.
• Replace the spark plug yearly; set the gap to 0.025 inch.
• Inspect for fuel leaks and replace cracked or soft fuel lines.
• Avoid repeated priming and extended choking during warm starts.

If it still will not start

What you notice	Likely cause	What to do
Strong fuel smell, plug wet again	Too much choke or priming	Choke OFF/RUN; throttle wide open while pulling
No spark or intermittent spark	Switch or ignition issue	Inspect wiring; test/replace the kill switch
Starts then dies on throttle	Fuel delivery problem	Check fuel line routing; service carburetor

Parts that commonly help

• Cracked or leaking fuel line: ayp lawn & garden equipment fuel line, large 530069216
• Intermittent shutoff or no spark: lawn & garden equipment kill switch 530069572
• Persistent fuel delivery issues: line trimmer carburetor 530071811

Why it matters

Flooding fouls the spark plug and makes a 2-cycle engine hard to start and run rough. Clearing excess fuel the right way restores a stable idle and smoother throttle response.

For model-specific starting and maintenance procedures, use the owner's manual. For additional parts searches by model number, use Sears PartsDirect.

Last updated: February 2026