What to know for Cooling and Overheating
Identify cooling-water failure signs and respond before overheating damages the engine.
Raw water, fresh water, impellers, strainers, seacocks, alarms, and overheating response. 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
- No exhaust water is an immediate warning
- Blocked strainers and failed impellers are common causes
- Fresh-water systems need coolant level checks
- Overheating requires load reduction and investigation
Last reviewed: 6 July 2026 by Compass Revision curriculum review
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