A man checking a water pump impeller on a boat engine

Stu Davies shows you how to check and replace an engine’s raw water pump impeller, and explains why it’s an important job

A propeller removed from a boat

While changing his engine oil, Chris Mardon noticed milky oil in his saildrive. Will it have caused damage to the leg? Stu Davies has the answer

Petrol pumps at a petrol forecourt

E5 and especially E10 petrol requires much more ‘fuel husbandry’ than older, ethanol-free petrol blends, as Jake Frith has discovered