Craftsman 917773745 wheeled weed trimmer Parts

For a Craftsman 917773745 2-cycle trimmer, we use fresh unleaded gasoline mixed with 2-stroke (air-cooled) engine oil at a 40:1 ratio (about 3.2 oz oil per 1 gallon of gas). Mix in an approved fuel can before filling the tank; do not mix in the trimmer’s tank.

Fuel and oil specs we recommend

• Gas: fresh, clean unleaded (avoid old fuel)
• Oil: 2-stroke oil for air-cooled engines (not automotive 4-cycle oil)
• Mix ratio: 40:1
• Mix only what you will use in 30 days
• Use a fuel can with volume markings for accurate measuring

Quick mix chart (40:1)

Gasoline amount	2-stroke oil to add
1 gallon	3.2 fl oz
1/2 gallon	1.6 fl oz
1 quart	0.8 fl oz

How we mix it (best practice)

1. Add about half the gasoline to an approved fuel container.
2. Add the measured 2-stroke oil.
3. Cap and shake to blend.
4. Add the remaining gasoline and shake again.
5. Fill the tank; wipe up spills and move the trimmer away from the fueling area before starting.

Why it matters

A correct 40:1 mix protects the 25cc 2-cycle engine from overheating and premature wear. Too little oil can score the cylinder and piston; too much oil can cause heavy smoke, plug fouling, and poor acceleration.

Model-specific notes

For any model-specific fuel cautions (storage steps, approved oil types, and starting procedure), follow the 917773745 owner’s manual.

Last updated: February 2026

For a Craftsman wheeled weed trimmer like model 917773745, .095-inch line is better for thick weeds and longer runtime between line changes, while .080-inch line is better for lighter trimming and cleaner edging. Choose based on what you cut most often; the “best” line is the one that matches your workload.

Quick pick guide

• Choose .095 if you cut tall grass, thick weeds, or rough fence lines
• Choose .080 if you mostly edge sidewalks and trim light grass
• If your trimmer bogs down or the head struggles, step down to .080
• If line breaks constantly, step up to .095
• Always confirm the maximum line size your head supports in the 917773745 owner’s manual

What changes between .080 and .095

The main difference is diameter, which affects durability and cutting load.

Line size	Best for	Tradeoff
.080 in	Light trimming, edging, detail work	Wears faster in heavy weeds
.095 in	Heavy trimming, thicker weeds, longer wear	More drag; can reduce RPM on smaller engines

How to decide for your yard

Use this simple rule:

• Mostly light grass and edging: start with .080
• Mixed yard with weeds: start with .095 (if your head is rated for it)

If you are replacing worn drive components that affect cutting performance (slipping, inconsistent head speed), inspect the belt and related hardware. On this model, common wear items include the line trimmer belt 532185476 and the high-wheel trimmer spindle assembly 596878501.

Why it matters

Correct line diameter helps your 917773745 cut efficiently without excessive vibration, stalling, or constant re-feeding. It also reduces wear on the cutting head and drive system.

Last updated: February 2026

When your Craftsman wheeled weed trimmer model 917773745 dies as you squeeze the throttle, the engine is usually running too rich or too lean under load. The most common causes are restricted airflow (dirty air filter), fuel delivery problems, or a carburetor that needs cleaning and adjustment; confirm the correct procedure in the 917773745 owner's manual.

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

• Clean or replace the air filter: a clogged filter reduces airflow and can make the engine bog and stall.
• Use fresh fuel: drain old gas and refill with fresh fuel mixed at the correct ratio (if your engine requires mix).
• Check the fuel cap vent: a plugged vent can create vacuum in the tank and starve fuel at higher throttle.
• Inspect the fuel line and filter: cracks, soft spots, or a restricted filter can limit fuel flow.
• Look for choke issues: if it only runs with choke partly on, the carburetor is typically restricted.
• Check the spark plug: a fouled plug can misfire when you accelerate.

What to do next (in order)

1. Start with airflow: service the air filter first.
2. Move to fuel: replace old fuel, then verify steady fuel flow from the tank.
3. Carburetor service: if it still stalls on throttle, clean the carburetor and replace gaskets/diaphragms if equipped.
4. Verify throttle linkage: make sure the throttle cable moves smoothly and returns fully; a sticking cable can cause erratic fueling.

Symptoms guide

What you notice	Most likely cause	Best first step
Idles OK, dies when accelerating	Restricted fuel flow or dirty carburetor	Fresh fuel, check cap vent, clean carb
Runs better with choke on	Lean condition (carb restriction or air leak)	Clean carb, inspect intake seals
Black smoke, strong fuel smell	Rich condition (air filter clogged, choke stuck)	Service air filter, check choke
Surges then stalls	Fuel restriction or carb issue	Check fuel line/filter, clean carb

Why it matters

Stalling on acceleration usually means the engine cannot maintain the correct air-fuel mixture when demand increases. Fixing airflow and fuel delivery early prevents hard starting, plug fouling, and poor cutting performance.

Last updated: February 2026

To replace trimmer line on your Craftsman 917773745 wheeled weed trimmer, we remove the spark plug wire for safety, open the cutting head, load the correct diameter line in equal lengths, then wind it evenly so it feeds smoothly when you bump the head. For model-specific line size and head style, use the 917773745 owner's manual.

Before you start (safety and setup)

• Shut the engine off and let it cool completely.
• Disconnect the spark plug wire so the trimmer cannot start.
• Clean grass and debris from the cutting head area.
• Wear gloves and eye protection.
• Cut two equal lengths of new line (most heads feed best when both sides match).

Reloading the line (typical bump-feed head steps)

1. Remove the spool cover (tabs or a knob, depending on the head).
2. Pull out the spool and note the line routing path.
3. Insert the line ends into the spool anchor holes or slots.
4. Wind the line in the direction of the arrows on the spool; keep tension so it lays in neat rows.
5. Feed the line ends through the eyelets in the head housing.
6. Reinstall the spool and cover; pull both line ends to confirm they move freely.

Quick checks if the line will not feed

Symptom	Most common cause	What we do
Line jams	Overwound or crossed wraps	Rewind neatly with steady tension
Line breaks fast	Line too thin or brittle	Use the manual-specified diameter; replace old line
Uneven cutting	One side longer	Trim ends to equal length

When a part is worn

If the head spins poorly, wobbles, or makes noise, inspect the drive components. On this model, common wear items include the line trimmer belt 532185476 and the high-wheel trimmer spindle assembly 596878501.

Why it matters

Correct winding and the right line diameter prevent tangles inside the spool, improve bump-feed performance, and reduce strain on the spindle and belt drive.

Last updated: February 2026

If your Craftsman wheeled weed trimmer model 917773745 will not start, the most common causes are stale fuel, a dirty air filter, a fouled spark plug, or a fuel delivery issue. We recommend checking the simple maintenance items first, then moving to ignition and carburetion.

Quick checks (fastest fixes first)

• Confirm the engine stop switch is in the RUN/ON position.
• Use fresh fuel (old gas can prevent starting); refill with the correct fuel mix if your engine is 2-cycle.
• Set choke correctly for a cold start, then open it as the engine tries to fire.
• Check the air filter; a clogged filter can flood the engine (too much fuel, not enough air).
• Inspect the spark plug for heavy carbon, wet fuel, or a cracked insulator.
• Make sure the throttle cable moves the throttle smoothly (binding can keep the engine from getting the right air/fuel).

Step-by-step troubleshooting

1) Fuel and flooding

A no-start often comes from fuel that is old, contaminated, or flooding the cylinder.

• Drain old fuel and refill.
• If the plug is wet, let the engine sit a few minutes, then try starting with less choke.

2) Air and spark

Use this simple decision guide:

What you see	Likely issue	What to do next
Plug is wet with fuel	Flooding or no spark	Dry/replace plug; verify spark
Plug is dry	Fuel not reaching cylinder	Check fuel line, primer, carb
Filter is dirty/oily	Restricted airflow	Clean or replace air filter

3) When to suspect a drive or mechanical issue

On a wheeled trimmer, a starting problem is usually engine-related, not belt-driven. Save belt and spindle checks for after the engine runs.

Parts that can be involved

These parts are commonly related to starting or control symptoms on this model:

• Line trimmer throttle cable assembly 586861201 (if the throttle does not respond)
• Drive control 532181699 (if controls bind or do not return normally)

Why it matters

Starting problems usually get worse over time. Fixing fuel quality, airflow, and ignition early helps prevent repeated flooding, hard starting, and carburetor varnish.

For model-specific starting and control procedures, follow the 917773745 owner's manual.

Last updated: February 2026

For the Craftsman 917773745 wheeled weed trimmer, fuel line size is chosen by matching the tubing’s inside diameter (ID) and outside diameter (OD) to the tank grommet and carburetor or primer fittings. Use the sizing and routing shown in the 917773745 owner's manual and match the old line for a leak-free fit.

How to identify the correct fuel line size

We size small-engine fuel hose by ID and OD, not just “small” or “large.” The goal is a snug seal on every barb fitting.

• Remove the old line and measure ID (hole size) and OD (outside width)
• Match the ID to the carburetor, primer bulb, and fuel filter barbs so it grips tightly
• Match the OD so it passes through the tank grommet without pinching
• Replace the grommet or filter if the hose feels loose or pulls off easily
• Cut the hose ends square and push fully onto each barb to prevent air leaks

Typical small-engine fuel line sizes (for reference)

These are common sizes you may see at small-engine shops; use them as a starting point, then confirm by measurement on your 917773745.

Common listing	Approx. OD	Approx. ID	Where it’s often used
9/64 in	0.140 in	0.080 in	Many trimmer feed/return lines
3/16 in	0.187 in	0.093 in	Primer/return circuits on some setups
1/4 in	0.250 in	0.125 in	Larger grommets or higher-flow lines

Signs the fuel line is the wrong size (or leaking)

• Primer bulb will not fill or won’t stay full
• Starts, then dies when you open the throttle
• Fuel seepage at the tank grommet or at a fitting

Why it matters

A correctly sized fuel line keeps the fuel system sealed. On a Craftsman wheeled trimmer, even a small air leak can cause hard starting, stalling, and poor throttle response.

Last updated: February 2026