Science of Silence

Exhaust Alert

How loud is the buzzer?

The buzzer is designed only to alert someone at the helm position. An optional 120 dB siren can be fitted to give a really loud alarm, or if you wish to position the helm display out of sight.

Can I fit it myself?

More than half the Exhaust Alerts sold are fitted by the owner – often with help. You will need to remove the exhaust hose from the engine to fit the sensor, but once this is done the rest of the work is fairly simple to someone with wiring skills.

Can it be used with any engine?

The Halyard Exhaust Alert is designed for use with diesel inboard engines between 5hp at 1200hp, with rubber hose exhaust systems. It cannot normally be used with inboard/outboard engines or with petrol engines.

Will it protect my engine?

The Halyard Exhaust Alert is designed to protect only the exhaust. The system should not be regarded as an engine protection device, although it may beat the engine temperature sensors when the engine is cold.

Will it protect the whole exhaust?

Exhaust Alert will normally spot trouble before serious damage occurs to quality exhaust hose or other components in the system. Plastic or polypropylene components will not be protected as their melt point is too low.

When won’t it work?

An engine ticking over, or running at very low revs under load, may not generate enough heat in the exhaust to cause the Halyard Exhaust Alert to sound, or to damage the exhaust. Under load, the temperature will triple and the system will more readily alarm.

Will the system go off without the engine?

The Halyard Exhaust Alert self-tests continuously and will detect voltage changes. It is important that it is live only when the engine is turned on.

Can I replace the sensor?

Yes. Spare sensors are readily available if the overheat was so serious that it burnt out the sensor.

For full details on installing Exhaust Alerts, please see the Exhaust Alert product manual, which can be found in the Download Section of this website.