Tips To Prevent Fuel Problems In Marine Engines

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Similar to other diesel engines, poor quality fuel can be a problem for marine engines too. This is particularly important for engines with aging fuel systems.

While experienced personnel understand how contamination can create problems, first timers are often unaware of this issue. This is why fuel system maintenance must continue during the sailing season too.

Pre-filters used in various stances such as during fueling at the dock and addition of preservative can help reduce contamination. However, these are not fool proof methods. Instead, we recommend taking following steps to prevent fuel problems in future:

1. Buy from a busy dock

The busiest docks have a higher demand for a reason. This is an indication of high quality diesel fuel supply. So go for the busiest commercial docks you can find. A busy service station is also good for your engine.

2. Avoid outside free water

Check the tank-fill opening every year. Replace the O-ring if and when required. You can also use a lubricant for O-ring to help with sealing. It will also prevent seizing.

Also consider installing a high loop to prevent water from entering the vent upon splashing or after being pushed by a following wave. This should be installed a minimum of 12 inches above the tank. If high loop doesn’t work, you can also consider a P-trap.

3. Fill up the tank

Water can enter the tank through a phenomenon called ‘tank breathing’. Some people prefer keeping only minimum volume of diesel in the tank. This is a mistake because it leaves a lot of space in tank for water to fill in. This can increase oxygen exposure as well as humidity inside the tank.

You should fill at least 90% of the tank with diesel fuel. This will reduce tank breathing.

4. Diesel fuel-polishing system

Tank sludge is normal and can only reduce it to certain extent. A system which recycles and filters the fuel can help prevent contamination. Bacterial and fungal contamination can be removed this way too.

Frequent filtration alone can’t prevent these contamination from reducing the quality of the fuel.

5. Effective filtration

Although it is not 100% effective, it does reduce contamination to a significant level. Especially when combined with fuel polishing system, filters can increase fuel efficiency. High-capacity filters and fuel/water separators can deliver valuable protection.

If your engine or other parts are malfunctioning, get them replaced today. For marine main engine parts and other ship spare parts, contact us now.  We provide high quality spare parts as well as quality services

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