Craftsman 917.776740 User Manual (English)

Questions and Answers:

S
shawn56Aug 2, 2025
Why my Craftsman 917.776740 Trimmer does not start?
- M
  Marisa AndrewsAug 2, 2025
  If your Craftsman Trimmer doesn't start, several factors could be at play. It might be due to a dirty air filter, in which case you should clean or replace it. Another reason could be that the fuel tank is empty, so you should fill it. Stale or water-contaminated fuel can also prevent starting, so empty the tank and refill with fresh, clean gasoline. Check that the spark plug wire is connected, and if the spark plug is bad, replace it. If your trimmer has a throttle control lever, ensure it's in the FAST position.
M
Marissa WattsAug 6, 2025
Why Craftsman Trimmer head does not retain line?
- L
  laura89Aug 6, 2025
  If the trimmer head on your Craftsman Trimmer isn't retaining the line, there are a few things to investigate. First, ensure the trimmer line is properly installed by following the instructions in the Maintenance section. If the line retainer clip is broken, replace the string carrier plate assembly. Lastly, make sure you're using the correct size of trimmer line (.155 diameter).
A
Andrew LewisAug 10, 2025
Why does my Craftsman 917.776740 Trimmer lose power?
- E
  elizabeth86Aug 10, 2025
  Loss of power in your Craftsman Trimmer can stem from a few common issues. A dirty air filter restricts airflow, so clean or replace it. Buildup of grass, leaves, and trash under the trimmer can also cause this, so clean the underside of the trimmer and trimmer head. Too much oil in the engine can hinder performance, so check the oil level. Lastly, walking too fast while trimming can bog down the engine, so try trimming at a slower pace.
C
Corey WilliamsonAug 15, 2025
How to improve trimming performance of my Craftsman 917.776740 Trimmer?
- S
  Sandra SandersAug 15, 2025
  Poor trimming performance with your Craftsman Trimmer can be attributed to a couple of things. If the trimmer line length is too short, replace the line, especially if it's worn or broken to half of its original length. Also, ensure the throttle control lever is in the FAST position.
K
Kimberly RobersonAug 19, 2025
Why is the starter rope hard to pull on my Craftsman 917.776740?
- J
  juliavillanuevaAug 19, 2025
  If the starter rope on your Craftsman Trimmer is hard to pull, it could be due to a bent engine crankshaft. Contact a Sears or other qualified service center.
A
Alexis RushAug 23, 2025
What to do if my Craftsman Trimmer has excessive vibration?
- M
  Matthew GomezAug 23, 2025
  Excessive vibration in your Craftsman Trimmer can arise from several sources. Check the trimmer lines to ensure they are even and not broken. Inspect all hardware, including engine bolts, for any looseness. Also, examine the trimmer head for damage and repair or replace it as needed.
O
Olivia CollierAug 27, 2025
What to do if my Craftsman 917.776740 has loss of head drive?
- M
  Michelle Brown DVMAug 27, 2025
  If you're experiencing a loss of head drive on your Craftsman Trimmer, it could be that the belt isn't driving. Put the belt back on the pulleys, or if the belt is broken, replace it.

Craftsman 917.776740 Specifications

General

Type	Gas Trimmer
Power Source	Gasoline
Engine Type	2-Cycle
Cutting Width	17 inches
Cutting System	Dual Line
Shaft Type	Straight

Summary

Warranty Information

Safety Rules and Precautions

Eye Protection

Trimmer operation can throw objects into eyes. Always wear safety glasses.

Preventing Accidental Starting

Always disconnect the spark plug wire before any setup, transport, adjustment, or repair.

General Operation Guidelines

Safe Operation Procedures

Read manual, keep clear of moving parts, ensure safe environment, wear proper clothing, and follow general precautions.

Slope Operation Safety

Safe Slope Trimming

Trim across slopes, not up/down. Exercise caution when changing direction.

Child Safety

Keep Children Away

Keep children out of the trimming area and under adult supervision.

Service and Maintenance Safety

Fuel Handling & Service Safety

Handle fuel carefully, store safely, and disconnect spark plug wire before maintenance.

General Maintenance Tips

Keep fasteners tight, check safety devices, keep machine clean, and clean spills.

Assembly and Pre-Operation

Unpacking and Initial Setup

Read instructions, unpack carefully, and unfold handle without pinching control cables.

Starter Rope Installation

Loosen T-knob, set brake to RUN, pull starter rope into guide, then tighten T-knob.

Operating Your Trimmer

Trimmer Familiarization and Safety

Read manual and safety rules. Become familiar with all controls and adjustments.

Engine and Trimmer Startup

Trimmer ships without oil/gasoline. Use engine brake to start/stop and control bar to engage trimmer head.

Using Your Trimmer Controls

Trimmer Head Control Operation

Push control lever forward and hold bar down to start. Release bar to stop trimmer head rotation.

Adjusting Cutting Height

Stop engine, disconnect spark plug wire. Push locking tab and move head to adjust cutting height.

Engine Oil Addition

Trimmer ships without oil. Add oil to the correct level, checking dipstick before each use.

Adding Gasoline

Gasoline Handling Precautions

Fill fuel tank to bottom neck with fresh, clean, unleaded gasoline. Do not overfill. Avoid alcohol-blended fuels.

Trimming Techniques

Effective Trimming Methods

Operate slower for thick weeds. Clean underside. Use line ends for cutting. Trim left side along fences.

Routine Maintenance

Scheduled Maintenance Tasks

Check fasteners, clean trimmer, check oil, filter, plug, and replace lines according to schedule.

Warranty and Maintenance Recommendations

Warranty excludes abuse/negligence. Maintain as instructed. Replace spark plug and air filter annually.

Lubrication Guidelines

Do not oil plastic wheel bearings. Use dry graphite lubricant sparingly if needed.

Repair Parts Identification

Trimmer Line Replacement

Replace trimmer lines when worn to half length. Use specified .155 inch diameter line.

Cutting Trimmer Line to Length

Use built-in gauge, wrap line around cover, and cut at '22' mark for correct length.

Trimmer Line Installation

Disconnect spark plug wire. Remove old line, insert new line, and pull outward to seat.

Engine Lubrication

Oil Selection and Change Procedure

Use high quality oil, select grade by temperature. Drain fuel, disconnect plug wire, add oil, and check level.

Air Filter Maintenance

Air Filter Cleaning and Replacement

Remove and tap cartridge to clean. Avoid solvents/pressurized air. Replace if very dirty.

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Craftsman 917.776740 User Manual

Table of Contents

Questions and Answers:

Craftsman 917.776740 Specifications

Summary

Warranty Information

Safety Rules and Precautions

Eye Protection

Preventing Accidental Starting

General Operation Guidelines

Safe Operation Procedures

Slope Operation Safety

Safe Slope Trimming

Child Safety

Keep Children Away

Service and Maintenance Safety

Fuel Handling & Service Safety

General Maintenance Tips

Assembly and Pre-Operation

Unpacking and Initial Setup

Starter Rope Installation

Operating Your Trimmer

Trimmer Familiarization and Safety

Engine and Trimmer Startup

Using Your Trimmer Controls

Trimmer Head Control Operation

Adjusting Cutting Height

Engine Oil Addition

Adding Gasoline

Gasoline Handling Precautions

Trimming Techniques

Effective Trimming Methods

Routine Maintenance

Scheduled Maintenance Tasks

Warranty and Maintenance Recommendations

Lubrication Guidelines

Repair Parts Identification

Trimmer Line Replacement

Cutting Trimmer Line to Length

Trimmer Line Installation

Engine Lubrication

Oil Selection and Change Procedure

Air Filter Maintenance

Air Filter Cleaning and Replacement

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