Craftsman 536773500 trimmer Parts

A “line trimmer” is the general tool type, and “whipper snipper” (often shortened to “whipper” or “snipper”) is a common nickname for the same kind of tool. For your Craftsman 536773500 gas line trimmer, the cutting method is a rotating nylon line, as shown in the 536773500 owner’s manual.

Quick definitions (what people usually mean)

• Line trimmer (string trimmer): Uses flexible nylon line to cut grass and light weeds.
• Whipper snipper: Regional nickname for a line trimmer (same tool category).
• Whipper / snipper: Shortened slang for “whipper snipper.”
• Brushcutter (different tool): Often uses a metal blade for heavy weeds and brush.

What this means for Craftsman 536773500

This model is designed around replaceable trimmer line, not a metal blade system. If your cut quality drops, the most common “difference” you will notice in real use is simply worn, wrong-size, or brittle line.

• Replace worn line with the correct trimmer line type and diameter for the head
• Keep line length even on both sides to reduce vibration
• Avoid feeding extra-long line; it overloads the engine and reduces RPM

A compatible replacement option we list for this model is trim line 79999.

Common comparison

Term you hear	Usually refers to	Cutting head type (typical)
Line trimmer	The tool category	Nylon line
Whipper snipper	Nickname for line trimmer	Nylon line
Whipper / snipper	Slang for whipper snipper	Nylon line
Brushcutter	Heavier-duty tool	Metal blade or heavy line

Why it matters

Using the right cutting setup helps your Craftsman trimmer cut cleaner, reduces stalling, and prevents extra wear on the cutting head and drive components.

Last updated: January 2026

For the Craftsman 536773500 gas line trimmer, the “best” .095 trimmer line depends on what you cut most often; for heavy weeds, many pros prefer a twisted .095 line for durability and cleaner cutting. For a model-matched option, use the line specified in the 536773500 owner’s manual.

How we recommend choosing .095 line

• Twisted line (.095): typically lasts longer and cuts cleaner in thick weeds.
• Round line (.095): feeds smoothly and is a good all-around choice.
• Square or star line (.095): can cut aggressively but may wear faster on hard surfaces.
• Match the head type: bump-feed heads usually tolerate more shapes than fixed-line heads.
• Avoid oversizing: if your trimmer head is designed for smaller line, .095 can reduce feed performance.

Model-specific guidance for Craftsman 536773500

We cannot confirm from the model-specific information here that the Craftsman 536773500 is designed for .095 line in every cutting head configuration. The safest approach is to verify the maximum line diameter and recommended line shape in the 536773500 owner’s manual before buying a large spool.

If you want a Craftsman-branded replacement cutting line that is listed for this model, you can use trim line 79999.

Quick comparison: common .095 line styles

Line style	Best for	Typical tradeoff
Twisted	Thick weeds, longer life	Can be louder
Round	General trimming, smooth feed	Less aggressive cut
Square/star	Fast edging and heavy growth	Can break faster on rocks/fences

Why it matters

Using the correct diameter and style helps your trimmer feed properly, reduces head wear, and improves cut quality. The wrong line can cause poor feeding, bogging, or extra vibration.

Last updated: January 2026

To reload the trimmer spool on your Craftsman 536773500 gas line trimmer, remove the spool, wind new line evenly in the direction shown on the spool, then secure the line ends in the retaining slots so it cannot unravel before reassembly. For model-specific diagrams, use the 536773500 owner’s manual.

Steps to reload the spool

• Shut the engine off and let the cutting head stop completely.
• Remove the spool cap/knob and lift the spool out of the cutting head.
• Cut two equal lengths of trimmer line (or use a pre-cut length if your head calls for it).
• Wind the line tightly and evenly in the direction of the arrow on the spool.
• Hook the line into the spool’s retaining notches/slots to keep it from unwinding.
• Feed the line ends through the eyelets in the head, reinstall the spool, then reinstall the cap.

Choosing the right line

For the Craftsman 536773500, using the correct diameter and type helps prevent jams and poor feeding. If you need replacement line, match what your head is designed for and avoid oversize line.

Line choice	Best for	Common symptom if wrong
Correct diameter round line	General trimming	Smooth feed, fewer tangles
Too thick line	None (avoid)	Binding, hard feed, stalling
Cheap/brittle line	None (avoid)	Frequent breaks, fraying

A compatible replacement option for this model is trim line 79999.

If the line keeps tangling or will not feed

• Rewind with steady tension; loose wraps can cross and bind.
• Do not overfill the spool; leave a little space below the rim.
• Make sure the line exits through the eyelets cleanly (no sharp burrs).
• Inspect the spool and cap for cracks or melted spots from overheating.

Why it matters

A properly wound spool reduces vibration, improves cut quality, and helps protect the cutting head components from heat and premature wear.

Last updated: January 2026

On the Craftsman 536773500 gas line trimmer, replacing the trimmer head typically means locking the shaft (or holding the head still) and unthreading the head from the drive. Many Craftsman heads use reverse threads, so removal can be clockwise and tightening can be counterclockwise; confirm the exact direction in the Craftsman 536773500 owner’s manual.

Before you start

• Shut the engine off and let it cool completely.
• Disconnect the spark plug wire to prevent accidental starting.
• Wear gloves and eye protection; the cutting area can be sharp.
• Clean grass and debris from the debris shield so you can see the fasteners.

Steps to remove and install the trimmer head

1. Lock the shaft/head: Use the head-lock feature (if equipped) or hold the head firmly so the shaft cannot turn.
2. Remove the head: Turn the head in the direction specified for removal (often clockwise on reverse-thread heads).
3. Inspect mounting hardware: Check for worn threads, missing washers, or a damaged retaining nut.
4. Install the replacement head: Thread it on by hand first to avoid cross-threading, then tighten in the opposite direction (often counterclockwise).
5. Test run: Reconnect the spark plug wire and run briefly at low throttle to confirm the head spins true with no wobble.

Common thread directions (what to expect)

What you see	What it usually means	Typical action
Head loosens when turned clockwise	Reverse-thread head	Remove clockwise, tighten counterclockwise
Head loosens when turned counterclockwise	Standard thread head	Remove counterclockwise, tighten clockwise

Why it matters

Correct thread direction and proper tightening prevent stripped threads, head wobble, and line feed problems. It also helps protect the cutting shaft and related hardware from damage.

Last updated: January 2026

If your Craftsman gas line trimmer model 536773500 will not start, the most common causes are stale fuel, a flooded engine, restricted airflow, or an ignition/fuel-delivery issue. We recommend following the starting and choke steps in the 536773500 owner’s manual first, then checking the basics below.

Quick checks (fastest fixes first)

• Confirm the stop switch is in the ON/RUN position.
• Use fresh fuel (old fuel can prevent starting); refill with the correct fuel mix if your unit is 2-cycle.
• Set choke correctly for a cold start; move to RUN as the engine tries to fire.
• Press the primer bulb (if equipped) until you see fuel moving.
• If it smells strongly of fuel, the engine may be flooded; open the choke, hold throttle open, and pull several times.

Airflow: clogged filter symptoms

A clogged air filter can make the engine run overly rich (too much fuel, not enough air), which can keep it from starting or make it start and die.

What to do:

• Remove the air filter cover and inspect the filter.
• If it is oily, packed with debris, or falling apart, replace it.

Fuel and spark: what to check next

What to check	What you’re looking for	Typical result if bad
Spark plug	Fouled, wet, cracked insulator	No start, intermittent start
Fuel lines/filter	Cracks, leaks, blockage	Starts then stalls, no start
Carburetor	Gummed from old fuel	Hard start, only runs on choke

When parts may be involved

This model’s parts list shown here does not include common engine tune-up items (like an air filter or spark plug). For compatible replacements, match parts by the exact model number 536773500 and browse the parts list for your engine components.

Why it matters

A no-start condition is usually a simple air-fuel-spark imbalance. Starting with the correct procedure and basic maintenance checks prevents unnecessary part swaps and gets your Craftsman trimmer running faster.

Last updated: January 2026

Some TrimmerPlus attachments can work with Craftsman trimmers, but we cannot confirm TrimmerPlus attachment compatibility for Craftsman model 536773500 from the model-specific information available. Use the attachment/coupler requirements in the 536773500 owner’s manual and compare them to the attachment’s stated fit system before buying.

How to check compatibility on Craftsman 536773500

Use these practical checks on your trimmer and on the attachment packaging:

• Confirm whether your trimmer has an attachment-capable coupler (a separate coupling point between the powerhead and shaft).
• Look for a locking mechanism at the coupler (button, pin, or clamp) that secures an attachment.
• Compare the attachment’s drive interface style to your trimmer’s shaft end (shape and engagement method vary by system).
• Verify the attachment brand’s fit statement specifically includes Craftsman attachment-capable powerheads (not just “fits many brands”).
• If your unit is a fixed-shaft design, attachments typically are not supported; you would use trimmer head accessories instead.

What we can and cannot say for this exact model

The Craftsman 536773500 parts listing does not clearly identify an attachment coupler assembly by name, so compatibility cannot be verified just by brand or model number.

What you have	What it usually means	Best next step
Coupler present between engine and shaft	May accept certain attachment systems	Match the attachment system and drive type
No coupler (one-piece shaft)	Typically not attachment-capable	Use line, head, and guard accessories
Attachment mounts but will not drive	Often a control or drive issue	Inspect cables and shaft components

If an attachment will not engage or bogs down

On model 536773500, these parts are common to inspect when power or engagement feels wrong:

• Throttle cable 740194MA (engine not reaching full speed under load)
• Control cable 740193MA (control/engagement not responding correctly)
• Cutting shaft 740169MA (drive transfer wear or damage)

Why it matters

Buying an attachment that does not match the coupler and drive style can lead to poor engagement, vibration, or damage to the shaft drive components. Verifying the connection style first helps you avoid returns and downtime.

Last updated: January 2026