Owner’s manual
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Why does my Craftsman trimmer die when I give gas?
When your Craftsman high wheel line trimmer model 917773753 dies as you squeeze the throttle, the most common cause is a fuel and air mixture problem, usually from a dirty air filter, stale fuel, or a restricted carburetor circuit. Start with the quick maintenance checks in the 917773753 owner's manual.
Quick checks that fix most “dies when I give gas” problems
- Replace or clean the air filter (a dirty filter can make the engine run overly rich and stall).
- Drain old fuel and refill with fresh gasoline (stale fuel causes hesitation and stalling).
- Check the spark plug condition and gap; this model uses a Champion RJ19LM or J19LM with a 0.030 in gap.
- Make sure the throttle control lever is in the correct position (if equipped).
- Inspect for grass and debris buildup under the trimmer that can load the engine.
Fuel system and carburetor notes (important for this model)
Your carburetor uses a nonadjustable fixed main jet, so “turning screws” is not the right fix. If the engine still stalls after fresh fuel and basic tune-up items, the carburetor likely needs cleaning or service by a qualified technician.
What to do (in order)
- Replace the air filter.
- Replace the spark plug (or clean and regap to 0.030 in).
- Refresh fuel and confirm the fuel can is clean (rust or dirt in the can causes repeat problems).
- Clean debris from under the trimmer and around the cutting head area.
Symptom-to-cause guide
| Symptom when you throttle up | Most likely cause | Best next step |
|---|---|---|
| Starts, then dies immediately | Dirty air filter or stale fuel | Air filter, fresh fuel |
| Bogging, then stall under load | Debris buildup, walking speed too fast | Clean underside, slow pace |
| Runs rough at all speeds | Spark plug issue | Replace/regap plug |
| Head drive feels weak plus stalling | Belt slipping or not driving | Inspect belt and pulleys; consider high-wheel trimmer driveshaft belt 532185476 |
Why it matters
Stalling on acceleration is usually the first sign the engine is not getting the right air-fuel mix or is being overloaded. Fixing it early prevents hard starting, loss of power, and premature wear on drive components.
Last updated: February 2026
What is the fuel mix for a Craftsman gas trimmer?
For Craftsman high wheel line trimmer model 917773753, use a 40:1 gasoline-to-2-cycle oil mix (40 parts fresh unleaded gasoline to 1 part 2-cycle engine oil). This model uses mixed fuel, not straight gas; follow the mixing and fueling steps in the 917773753 owner's manual.
How to mix 40:1 correctly
- Use fresh unleaded regular gasoline (do not use old or stale fuel)
- Use 2-cycle engine oil labeled for air-cooled engines
- Mix fuel in an approved gas can, not in the trimmer tank
- Shake the container well before fueling, and re-shake if it sits
- Only mix what you will use soon to keep starting and performance consistent
Quick mix chart (40:1)
| Gasoline amount | 2-cycle oil needed |
|---|---|
| 1 gallon | 3.2 fl oz |
| 1/2 gallon | 1.6 fl oz |
| 1 quart | 0.8 fl oz |
If straight gas was added by mistake
- Do not start the engine
- Drain the tank completely and refill with the correct 40:1 mix
- If the engine was run, replace the spark plug and inspect the fuel system before continued use
Why it matters
A 2-cycle engine depends on oil mixed into the gasoline for lubrication. Running straight gasoline causes rapid internal wear and can seize the engine; the correct 40:1 mix protects the piston and crank bearings and keeps the trimmer running reliably.
Last updated: February 2026
How to replace line on Craftsman gas trimmer?
On the Craftsman 917773753 high wheel line trimmer, you replace the cutting line by removing the worn line from the carrier plate, cutting new line to the specified length, then locking it under the retainer clips so both cutting ends match. Follow the steps in the 917773753 manual.
Before you start (safety)
- Disconnect the spark plug wire and keep it away from the spark plug.
- Let the engine and muffler cool completely.
- Stabilize the trimmer on a flat surface so it cannot roll.
- Wear gloves and eye protection; line ends can snap back.
Replace the trimmer line (carrier plate and retainer clip)
Use the same process for both sides of the head:
- Remove the worn trimmer line from the line carrier plate.
- Cut a new piece of trimmer line to the length specified for this model.
- Fold the new 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 seats fully under the retainer clip.
- Repeat on the other side; confirm both cutting ends are the same length.
| Step | What you are checking | What “good” looks like |
|---|---|---|
| Cut line | Correct length | Matches the manual’s specified length |
| Seating | Line retention | Line is fully captured under the retainer clip |
| Balance | Equal ends | Both cutting ends are the same length |
When to replace the line
Replace the trimmer line when it is worn to less than half its original length. Running short line reduces cutting performance and increases vibration.
Why it matters
Correctly installed, equal-length line cuts cleaner, reduces shake, and helps prevent premature wear on the trimmer head components.
Last updated: February 2026
