Welland Promotional Rescue Boat Practice Test

Old diesel fuel can indeed cause issues in the fuel system due to gelling, especially in colder temperatures. Diesel fuel can start to degrade over time, creating sediment and potentially leading to gelling, which can obstruct filters and injectors. While not all old diesel fuel will gel, it is a known risk, particularly if it has been stored improperly or for an extended period.

Therefore, the assertion that old diesel fuel cannot clog the system due to gelling is not accurate. Maintaining fuel quality by using it within a specific timeframe, proper storage, and additives can help mitigate this issue. This context is critical for understanding fuel management and maintenance in marine operations.