Technical Articles
Below are various articles that our technical department have written over the years
Coming up to the Spring? It’s time to start preparing your boat for the season ahead. Whether your boat has been winterised or stored throughout the winter months, there are a few things that you should ensure you do before using the boat again. Change the fuel filter/fuel-water separator If this wasn’t carried out back […]
Lubricants And Fluids Nanni
Coolant, also often referred to as antifreeze, or ‘fresh’ water, has an important job in keeping your engine cool. 🔹 1. Prevents Overheating Under Heavy Load Marine engines often operate at higher loads for longer periods than automotive engines. Old or degraded coolant loses its efficiency, making it harder to maintain stable temperatures and increasing […]
There is no excerpt because this is a protected post.
What is engine coolant, and what does it do? Engine coolant is a mixture of water and antifreeze that maintains the safe operating temperature of your engine and its components. The fluid draws away excessive heat from, or heats up, components in the engine by flowing through the cooling system around the engine. The Antifreeze […]
‘Winterising’ an engine is a key maintenance task for any boat owner. Failure to do so could mean more work in the Spring and potentially more expensive repairs should things go wrong. Your local engineer will be able to advise you on the necessary tasks that need to be carried out to prepare your engine. You should […]
Overheating or overheat warnings can be disheartening at best. It’s easy to assume the worst, but with some methodical steps outlined below, you can go through your cooling system and systematically rule out issues, or hopefully, discover them as you go along. The golden rule when it comes to identifying an issue? Start simple. Raw […]
With the introduction of higher output alternators and electronic charge splitter systems on boats having vastly improved, to benefit fully from a decrease in recharge time and longer runtime, the correct battery choice should be made. When making a battery purchase you need to consider – Battery life expectancy (how often is it to be […]
Have you considered fitting a calorifier? If not, you should! A calorifier is a type of water heater commonly found on boats, especially those used for extended cruising or liveaboard lifestyles. It uses engine heat or electricity to domestic fresh water, which can then be used for showers, washing dishes, or general cleaning. Here are […]
💧 Pump Flow Rate Definition: The volume of fluid a pump moves over a certain time. Measured in: Litres per minute (L/min) Gallons per minute (GPM) Cubic meters per hour (m³/h) Key Points: Describes how much fluid is being moved. Important for tasks like filling tanks, circulating water, or ensuring enough water reaches fixtures. Higher […]
The circulation of the lubricating oil around the engine has quite rightly been likened to the human blood circulation system. The oil is pumped from the sump through the filter and into the bore holes leading to the main bearings on the crankshaft. After leaving these main bearings, the oil flow is divided. Part of […]
Why is there a lot of noise and vibration coming through the boat, particularly from the stern end? A common cause of noise and vibration through the boat from the stern is a worn cutlass bearing. The cutlass bearing, which supports the shaft, can be found inside the p-bracket or stern tube, depending on the […]
Undoubtedly, some of you will have old, tired engines that need some attention, and often it comes down to a choice between rebuilding the existing unit or replacing it altogether. In these situations, it can be very easy to be tempted into rebuilding an engine as this appears to be a cheaper/easier option than re-powering. […]
Fuels can be subject to a big debate. Both in terms of benefits, issues, and general opinions. Here, we intend to dispel the myths, reinforce the facts, and give you the knowledge to be confident in what you use. Biodiesel Lets start with Biodiesel, seeing as this is more commonly used in the UK boating […]
Bow Thrusters, Stern Thrusters. Do you need one? Which one is best? These are questions we will aim to answer below. There is no right or wrong answer as each variant will have it’s pros and cons. But to begin with, let’s explore what a thruster is for! Thrusters, simply, are an aid for navigating […]
If you haven’t done before, now is an ideal time to start thinking about your boat fuel efficiency. Not only because of the current economic climate and rising fuel prices but also because it can go a small way into helping the environment too. There are a few things that can be done to help […]
The Nanni Diesel model numbers beginning with T, such as the T4.165, T4.205 or T4.270 are based on common rail Toyota blocks from their rugged 4×4 automotive sector. The common rail system uses highly pressurised fuel for improved fuel economy and provides robust engine power, while reducing noise and vibration. The system stores fuel in […]
When thoughts turn to winter maintenance and servicing, correct preparation will ensure a successful boating season the following year. Some considerations to bear in mind: Hull Condition If your boat is out of the water, this is the time to check and repair any hull damage, look out for scratches, blisters and abrasions to the […]
