Before you start
Gather the appropriate supplies and review the specific equipment manual.
- Marine CO alarm specifications
- Engine exhaust inspection history
- Ventilation plan
Step-by-step instructions
Identify possible sources
Consider diesel or gasoline exhaust, portable generators, propane appliances and neighboring boats.
Review exhaust routing
Check for signs of leaks, damaged hoses or exhaust outlets near open ports; have faults assessed by a technician.
Install and maintain suitable alarms
Use appropriate marine-rated detectors positioned and serviced to their manufacturer’s instructions.
Avoid unsafe generator placement
Never run a portable generator in an enclosed cockpit, cabin, hatch area or any location where exhaust can enter the vessel.
Respond urgently to symptoms or alarms
Get everyone to fresh air, stop combustion sources only if safe and call emergency services or coast guard as appropriate.
Safety note
Carbon monoxide has no reliable odor. Headache, dizziness and nausea aboard can indicate poisoning requiring immediate medical evaluation.
Key takeaway
Ventilation and suitable alarms are essential because CO cannot be detected by smell.
Keep this job on your maintenance schedule
Save the topic as a maintenance task, choose a due date or engine-hour target, and record future service. Free and stored on your device.
Add to my maintenance plannerThis guide is for general education. Follow your equipment manufacturer’s instructions, current navigation guidance and applicable marine safety standards. When uncertain, use a qualified marine professional.