What is diagnosis code 782?
Diagnosis code 782 is commonly used as an ICD-9 medical code for symptoms involving the skin and other integumentary tissue (for example, nonspecific skin symptoms). It is not a Briggs lawn and garden engine diagnostic code for model 126T02-0782-B1.
On Briggs engine model numbers like 126T02-0782-B1, the “0782” portion is a model/type identifier, not a medical diagnosis or an engine fault code. It helps match the correct parts (spark plug, fuel line, carburetor parts) to your exact engine build.
Using the correct engine model and type prevents ordering the wrong Briggs parts and avoids fitment issues during repair.
If your Briggs 126T02-0782-B1 engine is hard to start, runs rough, or stalls, these checks solve most common issues:
- Replace the spark plug if it is fouled or worn (use the correct part for this engine)
- Inspect the fuel line for cracks, soft spots, or leaks
- Drain old fuel and refill with fresh fuel
- Clean the carburetor bowl and replace the bowl gasket if it seeps
- Check the recoil starter rope and handle for fraying or slipping
| Symptom | Likely area | Example part for this model |
|---|---|---|
| No start or misfire | Ignition | Briggs & stratton lawn and garden spark plug 796112S |
| Starts then dies | Fuel delivery | Briggs & stratton lawn & garden equipment engine fuel line, red 791766 |
| Fuel leak at carb bowl | Carburetor sealing | Briggs & stratton lawn & garden equipment engine carburetor float bowl gasket 796610 |
Match parts to the full model exactly as 126T02-0782-B1 (including the “0782” type). If you are unsure, use our model number help: how to find your appliance model number (and what it means for parts).
Last updated: February 2026
What are the most common issues with 126T02-0782-B1?
The most common problems we see on the Briggs & Stratton 126T02-0782-B1 lawn and garden engine are no-start or hard-start, rough running or surging, fuel leaks, and pull-start issues. These usually trace back to ignition, fuel delivery, or the recoil starter system.
- Won’t start / starts then dies: fouled spark plug, stale fuel, restricted fuel line, dirty carburetor bowl or float issue
- Surging at idle or under load: carburetor float/needle sticking, air leak, partially clogged main jet
- Fuel smell or leaking: cracked fuel line, leaking carburetor bowl gasket, stuck float
- Pull cord won’t retract or slips: worn recoil spring, damaged rope, worn friction plate
- Stops when you release the handle (mower applications): stop switch or brake system issue
- Drain old fuel and refill with fresh fuel.
- Inspect the fuel line for cracks, softness, or loose connections; replace if questionable.
- Remove and inspect the spark plug; replace if the electrode is worn or the plug is fuel-fouled.
- If it surges or leaks fuel, service the carburetor bowl area (gasket, float, needle).
- If the pull start is the issue, inspect the rope and recoil components for wear.
| Problem | Common fix | Example part on this model |
|---|---|---|
| No start, misfire | Replace spark plug | Briggs & stratton lawn and garden spark plug 796112S |
| Fuel leak, hard start | Replace fuel line | Briggs & stratton lawn & garden equipment engine fuel line, red 791766 |
| Surging, flooding | Carburetor bowl gasket | Briggs & stratton lawn & garden equipment engine carburetor float bowl gasket 796610 |
| Flooding, fuel overflow | Float or needle valve | Briggs & stratton lawn & garden equipment engine carburetor float 398187 and Briggs & stratton lawn & garden equipment engine carburetor needle valve 398188 |
| Pull cord problems | Replace rope | Briggs & stratton lawn & garden equipment engine recoil starter rope 697316 |
Catching fuel and ignition issues early prevents repeated no-starts, plug fouling, and carburetor flooding. Fixing recoil starter wear also avoids sudden pull-cord failure when you need the engine to start reliably.
Last updated: March 2026
How do I find the model number on my 126T02-0782-B1?
On a Briggs & Stratton engine like model 126T02-0782-B1, the model number is stamped into the metal on the engine itself (not on the mower deck). We use that exact stamping to match the correct parts list and diagrams for your engine.
Check these common locations first; clean the area so the stamping is readable:
- Valve cover area (side of the engine near the muffler)
- Blower housing/shroud (the metal cover around the recoil starter)
- Above the spark plug area on the cylinder
- Near the muffler heat shield
- On the engine block close to where the fuel tank mounts
A flashlight and a rag with a little degreaser usually makes the numbers stand out.
Briggs engines typically show a Model / Type / Code format. For your engine, the model portion will match 126T02-0782-B1.
| Field on engine | What it means | Example format |
|---|---|---|
| Model | Engine family and configuration | 126T02-0782-B1 |
| Type | Build variation | 6 digits |
| Code | Date code | 8 digits |
Using the full model stamping helps us avoid mismatches between similar engines that use different ignition, carburetor, or starter components.
- Spark plug and ignition parts can vary by type code
- Fuel system parts can differ by tank and carburetor version
- Recoil starter parts can change by housing style
If you are also replacing a common tune-up item, match it to the parts list for your engine, for example the Briggs & stratton lawn and garden spark plug 796112S.
- Wipe off oil and grass buildup
- Look for faint, dot-matrix style stamping
- Take a close-up photo and zoom in
Last updated: March 2026
