Why it will not start

Sign in to read this lesson

Lessons are for learners and teachers with an account. Browsing the curriculum — subjects, strands and what each sub-strand covers — stays open to everyone.

• 8 sections of explanation, worked examples and diagrams
• 1 practice task with hints and worked answers
• A quiz that marks itself as you go
• Your progress kept across every subject you take

Other lessons in this sub-strand

1. What the four-stroke is made of
2. Four strokes, two turns
3. Draw in, then squeeze
4. The push, then the burned gas
5. How hard the mixture is squeezed
6. Tools for measuring and fitting
7. Look before you measure
8. Bore, stroke and ovality
9. Journal and bearing clearance
10. Three gaps, three jobs
11. How far the cam lifts
12. Strip in order, then price the parts
13. Put it back to the card
14. Why it will not start
15. Smoke, shake and knock