What to know for Air, Exhaust, and Electrics
Separate starting faults from running faults and identify basic electrical warning signs.
Air supply, exhaust restrictions, batteries, starter circuits, alternator charging, and warning lights. This module is mapped to the published course boundary for Marine Diesel Engine Revision and written as an independent revision aid, not official training material.
Key Points
- Diesels need unrestricted air intake and exhaust
- Starting depends on battery, cables, switches, and starter
- Alternator belts and warning lights matter
- Electrical checks should be systematic and safe
Last reviewed: 6 July 2026 by Compass Revision curriculum review
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