Science of Silence

Five ways to maintain the health of your exhaust system

To keep your exhaust running at an optimal level, the rest of the engine needs to be working in order as well. When all aspects from the fuel to the engine itself, the silencer and exhaust work in harmony, your yacht will require little maintenance and provide a pleasant ride. However, when one of these components starts to suffer, so can the entire system.

Here, we look at five ways to increase the “health” and longevity of your engine and exhaust system.

“Exercise” your engine
You may think you’re minimising the risk of damage and doing yourself a favour in terms of fuel consumption by running your engine at a low speed, but it’s actually the opposite. Running the engine at RPM, or roughly 80% of its maximum speed, can help reduce vibration, noise and increase the engine’s longevity. The RPM will vary depending on each engine, but once you’ve ascertained what is right for your vessel, this will help “exercise” the engine and actually improve energy efficiency.

Avoid idling when possible
Idling doesn’t do you any favours when it comes to fuel or the engine. The same as with vehicles on land, idling is a waste of fuel. It also means the engine is kept running below optimal speed (RPM) for long periods of time, which can increase wear and tear as well as the chances of further damage. While travelling at speed, the residue from the engine is pushed quickly through your exhaust system, but when idling or travelling at slow speeds, this residue deposits on the exhaust, which can lead to damage and ultimately having to replace it.

Clean the airways
It’s natural for air to enter the exhaust system, but the build up of air (or air “pockets” or “bubbles”) can potentially prohibit fuel from circulating to the engine. Experts recommend venting this air regularly via specially-built venting nuts to keep the flow of fuel clear and uninterrupted.

Clean the silencer
To further improve the circulation of air and fuel in your system, if your yacht is fitted with a silencer, this should be cleaned on a regular basis as well. Even the smallest disruption to the airflow can make a significant difference, but the silencer is easy to clean or replace as necessary to stop this disruption from happening.

Check your oil
Ensuring the oil and filter will also help to ensure uninterrupted flow around your engine and exhaust systems. It’s a fairly simple task to carry out, but can make a significant difference, as old oil can cause damage to the engine and cause unnecessary wear and tear.

If you’ve got questions about how to keep your engine and exhaust systems in peak condition, contact the experts at Halyard Ltd to have your questions answered.