# Small Engine No-Start First Checks

Use a basic fuel, spark, air, and safety-interlock ladder before replacing parts.

## Outcome
Describe a no-start problem in evidence terms.

## Safe first step
Make the machine safe and follow the manual before inspection.

## Ladder steps
### 1. Check safety conditions
Learn to check safety conditions as one discrete move in the project path.

Check: You can explain or demonstrate: check safety conditions.

### 2. Check fuel basics
Learn to check fuel basics as one discrete move in the project path.

Check: You can explain or demonstrate: check fuel basics.

### 3. Check air path
Learn to check air path as one discrete move in the project path.

Check: You can explain or demonstrate: check air path.

### 4. Check spark evidence
Learn to check spark evidence as one discrete move in the project path.

Check: You can explain or demonstrate: check spark evidence.

## Examples
### Practice fuel level and valve position
```sh
Fuel level and valve position
```
Expected signal: A visible result you can compare before moving on

### Practice air filter visual check
```sh
Air filter visual check
```
Expected signal: A visible result you can compare before moving on

### Practice spark plug inspection
```sh
Spark plug inspection
```
Expected signal: A visible result you can compare before moving on

## Common traps
- Replacing parts randomly.
- Ignoring stale fuel.
- Testing spark unsafely or near fuel vapors.

## Practice task
Create a small practice case for small engine no-start first checks and write what each step proves before moving to the next one.

## Next steps
- Download the Obsidian note.
- Review the Anki cards.
- Pick one related ladder and do the practice task.

## Related
- [Browse topic clusters](/topics/)
- [All learning ladders](/learn/)