Practice question

A school bus diesel starter spins (free-runs) but does not engage and crank the engine. The MOST likely cause is:

  1. A fully charged battery
  2. Too much engine oil
  3. A clean air filter
  4. A faulty starter drive/pinion or worn flywheel ring gear preventing proper engagement

Answer: D — A faulty starter drive/pinion or worn flywheel ring gear preventing proper engagement

The correct answer is shown above. Try the full quiz for additional practice.

Practice more: ASE S2 Diesel Engines (School Bus) Practice Questions - ASE S2 - Diesel Engines (School Bus) Certification Exam →