Craftsman 917773742 wheeled weed trimmer Parts

When your Craftsman wheeled weed trimmer model 917773742 dies as you squeeze the throttle, the most common cause is a restricted air or fuel supply. Start by checking the air filter and fuel condition; the manual also lists dirty air filter, stale fuel, or water in fuel as top stall and power-loss causes. See the 917773742 owner's manual.

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

• Clean or replace the air filter: A dirty filter makes the engine run overly rich and stall under load.
• Drain old fuel and refill with fresh gasoline: Stale fuel causes hesitation and stalling.
• Check for water or dirt in the fuel: Contamination can make the engine die as RPM increases.
• Inspect the spark plug and wire: A loose wire or worn plug can misfire when you open the throttle.
• Verify throttle control position (if equipped): Incorrect lever position can limit fuel/air delivery.

What the manual points to (model 917773742)

The troubleshooting section for this model calls out these likely causes for stalling or loss of power:

Symptom	Most likely causes to check first
Starts then stalls when throttling up	Dirty air filter; stale fuel; water in fuel
Loss of power under load	Dirty air filter; debris buildup under trimmer; too much engine oil

Why it matters

A trimmer that dies when you give it gas is usually running too rich (not enough air) or not getting steady, clean fuel. Fixing the root cause prevents repeated stalling, hard starting, and plug fouling, and it helps protect the engine during heavy trimming.

Last updated: February 2026

For the Craftsman 917773742 wheeled weed trimmer, neither .080 nor .095 is the better choice because this model is designed to use .155-inch trimmer line cut to 18-3/4 inches. Using the specified size helps prevent vibration, poor cutting, and premature wear; see the 917773742 owner's manual.

What we recommend for model 917773742

Use the line size and length the manufacturer specifies for this trimmer head.

• Use .155-inch diameter trimmer line
• Cut each piece to 18-3/4 inches
• Replace lines when they wear to half their original length
• Keep all installed lines within 1 inch of each other in length to avoid imbalance
• Use the ends of the line to do the cutting (move slowly in heavy weeds)

.080 vs .095: quick comparison (general guidance)

If you are choosing line for a different trimmer that accepts those sizes, here is the practical difference.

Line diameter	Best for	Tradeoff
.080 in	Light trimming and edging	Wears faster in thick weeds
.095 in	Heavier weeds and longer runtime	More load on small trimmers

Why it matters on this Craftsman wheeled trimmer

Your 917773742 uses a trimmer head designed around a heavier line. Running undersized line (like .080 or .095) can reduce cutting performance and may cause the head to run unbalanced, which increases vibration and wear.

Related parts that affect cutting performance

If cutting feels weak or the head vibrates even with correct line, inspect the drive system and cutting head components.

• Check the line trimmer belt 532185476 for glazing, cracking, or looseness
• Inspect idler pulleys and belt routing (per the manual)
• Avoid letting the trimmer head contact concrete or asphalt; it can wear the mow ball quickly

Last updated: February 2026

On the Craftsman 917773742 wheeled weed trimmer, “replacing the trimmer head” usually means servicing the cutting head area (carrier plate, mow ball, spindle) and, if needed, removing the debris shield and belt to access the trimmer head pulley. Follow the step-by-step procedure in the 917773742 owner's manual to avoid cross-threading and to keep the belt routed correctly.

Before you start (safety and setup)

• Disconnect the spark plug wire and keep it away from the plug.
• Let the engine cool completely.
• Work on a flat surface; tip the trimmer only with the carburetor and fuel cap facing up.
• Wear gloves; trimmer line and hardware can cut hands.
• Keep track of screws and belt keepers so they go back in the same positions.

Accessing the trimmer head area (what the manual has you remove)

The manual’s trimmer head access procedure focuses on removing covers and the debris shield, then slipping the belt off pulleys.

Typical access steps:

1. Remove the screw at the front of the chassis cover; lift the cover off.
2. Remove the debris shield screws (sides and underside); slide the debris shield rearward to remove.
3. Remove the belt from the engine pulley, then from the trimmer head pulley.

If your issue is loss of head drive or the head stops turning, a worn belt is a common cause; the correct replacement is the line trimmer belt 532185476.

If you meant “replace the string head line” (most common request)

This model uses fixed-length line segments retained in the carrier plate.

• Cut bulk line to 18-3/4 inches (use the built-in length gauge on the debris shield).
• Remove worn line from the carrier plate.
• Fold the new line in half; insert the folded end through the carrier plate opening to the back side of the retainer clip.
• Pull outward until fully seated under the retainer clip; repeat for the other side.
• Confirm both lines are the same length.

Quick diagnosis guide

Symptom	Most likely cause	What to check/replace
Head does not turn	Belt not driving	Inspect/replace line trimmer belt 532185476
Line won’t stay in	Retainer clip damaged or line installed wrong	Reinstall line; inspect carrier plate/clip
Poor trimming	Line too short or uneven	Replace line; match lengths

Why it matters

Correct belt routing, debris shield installation, and proper line length keep the trimmer head spinning at the right speed and prevent thrown line pieces that can become hazardous.

Last updated: February 2026

On a Craftsman wheeled weed trimmer like model 917773742, the model number is typically printed on the product ID label on the trimmer’s frame or chassis area. For this unit, the owner’s manual also lists the model as 917.773742 (same model, different formatting). See the 917773742 owner's manual for label and identification details.

Where to look on the trimmer

Check these common label locations first (wipe off grass and dirt so the tag is readable):

• On the chassis/frame near the engine mounting area
• Near the handle lower bracket or handle adjustment area
• Around the rear axle/wheel area on the frame
• Near the belt/drive cover area on the chassis
• On a sticker or metal tag riveted to the frame (not on the trimmer line head)

What number you should write down

For Craftsman outdoor power equipment, we recommend recording the full model number exactly as shown on the label.

What you see	What it means	What to do
917.773742	Model number with a dot format	Record it exactly; it matches 917773742
917773742	Model number without dots	Record it exactly; it matches 917.773742
126T02-1378-B1	Engine model (Briggs & Stratton)	Record it too; it helps for engine parts

Why it matters

We use the model number to match the correct parts diagrams and parts like the line trimmer belt, wheels, throttle control components, and hardware. Using the product label model number helps avoid ordering a look-alike part that does not fit.

Quick tip if the label is missing or unreadable

Use the manual’s parts list and diagrams to confirm you are working with the correct configuration for model 917773742; then match parts by description and key number.

Last updated: February 2026

For your Craftsman wheeled weed trimmer model 917773742, we recommend buying replacement parts by searching with the full model number and matching the exact part ID or part number. That approach helps you get the correct fit for wear items like belts, lines, and hardware, and it aligns with the parts and maintenance guidance in the 917773742 owner's manual.

Best ways to find the right Craftsman part

• Use the full model number 917773742 when you search; it narrows results to the correct diagrams and parts list.
• Match by part ID first (most precise), then confirm the part number and part name.
• Replace common wear items proactively (for example, belts and rotating line) to keep cutting performance consistent.
• If you are unsure which component you need, identify the assembly first (cutting head, drive system, wheels, controls).
• Keep fasteners tight and the unit in good condition after repairs (a key maintenance point in the manual).

Examples of model-matched parts (917773742)

Here are a few parts that are commonly involved in repairs on this type of high-wheel trimmer:

What you are fixing	Part to check	What it does
Drive slipping or no drive	Line trimmer belt 532185476	Transfers power through the drive system
Cutting head wobble or noise	High-wheel trimmer spindle assembly 596878501	Supports the cutting head and pulley
Throttle not responding smoothly	Line trimmer throttle cable assembly 586861201	Connects the control to the engine throttle

Why it matters

Craftsman trimmers often have multiple similar-looking versions. Using 917773742 plus the exact part ID helps prevent ordering a belt, spindle, or cable that looks right but mounts differently, which saves time and avoids repeat repairs.

Quick safety reminders before you service it

• Shut the engine off and let it cool.
• Disconnect the spark plug wire to prevent accidental starting.
• After reassembly, recheck that nuts and bolts are tight, especially around the trimmer head and engine.

Last updated: February 2026

If your Craftsman wheeled weed trimmer model 917773742 will not start, the most common causes are stale fuel, a dirty air filter, a fouled spark plug, or a safety/control issue that prevents proper ignition. We recommend following the step-by-step checks in the 917773742 owner's manual to isolate the exact failure.

Quick checks (fastest fixes first)

• Use fresh fuel: Drain old gas and refill with fresh, properly mixed fuel (if your engine requires mix) or fresh straight gas (if 4-cycle). Old fuel is the top no-start cause after storage.
• Check the air filter: A clogged air filter can choke airflow and flood the engine.
• Inspect the spark plug: If it is wet, black, or damaged, replace it and set the correct gap per the manual.
• Verify throttle/cable movement: Make sure the throttle lever actually moves the carburetor linkage; a stretched or stuck cable can keep the engine from getting the right fuel/air.
• Confirm the stop switch is not engaged: A grounded kill circuit prevents spark.

Fuel, spark, and air: what to test

Use this simple guide to narrow it down before buying parts.

What you observe	Most likely area	What to do next
Engine fires briefly on priming/fresh fuel then dies	Fuel delivery	Clean carburetor passages; confirm fuel lines and primer function
Plug is wet after cranking	Too much fuel or restricted air	Replace/clean air filter; dry/replace spark plug
Plug stays dry after repeated pulls	Not getting fuel	Check tank vent, fuel pickup, and carburetor inlet
No spark at plug	Ignition/kill circuit	Inspect stop switch wiring; replace plug first

Model-specific parts that can affect starting

On model 917773742, these drive and control parts will not usually cause a true “no spark” condition, but they can contribute to poor engagement or control problems that feel like a starting issue:

• Line trimmer throttle cable assembly 586861201 (if the throttle does not respond)
• Drive control 532181699 (if the unit will not drive after it starts)
• Line trimmer belt 532185476 (if the cutting head does not spin after it starts)

Why it matters

A no-start problem is almost always a basic fuel-air-spark issue. Checking those items first prevents unnecessary parts replacement and gets your Craftsman trimmer running faster, especially after seasonal storage.

Last updated: February 2026

For a Craftsman 2-cycle 25cc trimmer, use fresh unleaded gasoline mixed with quality 2-cycle engine oil at the fuel-to-oil ratio specified for your exact engine. Confirm the correct mix ratio and fuel recommendations in the 917773742 owner's manual before you fill the tank.

What to use

• Gasoline: Fresh, unleaded regular gasoline
• Oil: 2-cycle (2-stroke) engine oil made for air-cooled outdoor power equipment
• Mixing: Pre-mix gas and oil in an approved fuel can before filling the trimmer
• Storage: Mix only what you will use soon; discard old fuel that has gone stale

Common 2-cycle mix ratios (reference)

Use the ratio listed for your engine; these are the most common ratios you will see:

Mix ratio	Gasoline	2-cycle oil
50:1	1 gallon	2.6 oz
40:1	1 gallon	3.2 oz
32:1	1 gallon	4.0 oz

How to mix it correctly

• Start with a clean, approved fuel container.
• Add about half the gasoline.
• Add the measured 2-cycle oil.
• Add the remaining gasoline and shake to blend.
• Fill the trimmer’s fuel tank; wipe up spills before starting.

Why it matters

A 2-cycle engine is lubricated by the oil in the fuel. Too little oil causes rapid engine wear and seizure; too much oil causes heavy smoke, plug fouling, and poor performance.

Last updated: February 2026

On the Craftsman 917773742 wheeled weed trimmer, you replace the cutting line by shutting the engine off, disconnecting the spark plug wire, then removing the worn line and installing new line cut to the correct length and diameter. Follow the step-by-step procedure in the 917773742 manual.

What line to use for model 917773742

The manual specifies a fixed-length line setup for this trimmer head.

• Use .155 inch diameter trimmer line.
• Cut each new line piece to 18-3/4 inches.
• Replace the line when it wears to about half its original length.
• Keep both line pieces the same length (within about 1 inch) to prevent vibration.

Spec	Model 917773742 requirement
Line diameter	.155 in
Cut length (each piece)	18-3/4 in
Balance check	Lines within 1 in of each other

Steps to replace the trimmer line (carrier plate and retainer clip)

Use this method when your trimmer head uses a carrier plate with retainer clips (as shown in the manual).

• Disconnect the spark plug wire and position it so it cannot contact the plug.
• Remove the worn trimmer line from the line carrier plate.
• Cut new line to 18-3/4 inches.
• Fold one piece of line in half.
• Insert the folded end through the carrier plate opening to the back side of the retainer clip.
• Pull the line outward until it is fully seated under the retainer clip.
• Repeat for the other side; confirm both lines are the same length.
• Reconnect the spark plug wire.

If the head will not retain or feed line

These checks match the troubleshooting guidance in the manual.

• Confirm the line is installed under the retainer clip correctly.
• Verify you are using .155 in line (wrong diameter will not hold properly).
• Inspect the retainer clip area for damage; replace the carrier plate assembly if the clip is broken.

Why it matters

Correct line diameter and matched line lengths keep the trimmer head balanced. That improves cutting performance, reduces vibration, and helps prevent premature wear to the trimmer head and mow ball area.

Last updated: February 2026

The Craftsman 917773742 wheeled weed trimmer uses pre-cut trimmer line that is 0.155-inch diameter and 18.75 inches long. That size is listed in the parts list for this model in the 917773742 owner's manual.

Correct trimmer line specs for model 917773742

Use these specs when buying replacement strings or cutting your own pieces:

• Diameter: 0.155 in (about 4.0 mm)
• Length per piece: 18.75 in
• Type: pre-cut strings (not a spool)
• Install quantity: typically two equal-length pieces in the cutting head/mow ball area
• Best practice: replace both pieces at the same time to keep cutting balanced

OEM part reference for the line

The manual identifies the line as “Line, trimmer 0.155 diameter x 18.75 long.” On the parts list for this model, the line bundle is shown as:

What you need	How it’s listed	What to match
Replacement pre-cut strings	Line bundle	Line.bund.18 580412601

Tips if the trimmer vibrates or cuts poorly

Correct line size and equal lengths prevent wobble and reduce load on the belt and spindle.

• Cut both pieces to exactly 18.75 inches
• Use 0.155-inch line; thicker line overloads the drive system
• Replace frayed or uneven strings immediately
• Clear wrapped grass from the head area before installing new line

Why it matters

This Craftsman high-wheel trimmer is designed for a specific cutting load. Using the correct 0.155-inch diameter and 18.75-inch length helps maintain RPM, improves cut quality, and reduces wear on drive components.

Last updated: February 2026