Rob Melotti gets one-to-one tuition on caring for a 4-stroke at the Honda Institute
How to care for an engine that has been immersed in water
If your 4-stroke outboard goes overboard, you have a big problem. In salt water with the engine running, you’ll be lucky to get it back to working order – water in a crank case will not compress and can bend the metal components in the engine. Rust can begin to take hold in hours once metal elements are exposed to the air after immersion. But if you drop your outboard off the pontoon or it gets dislodged from the stern of your tender when not in use – the following steps (which are in the manual for this Honda 6hp) taken immediately upon recovery, may be enough to get you home, but the advice from Honda is to get the engine to your nearest service engineer as soon as possible.
2. Shut off the fuel feed and drain the carburettor (see previous page step by step).
5. Replace engine oil and attend to sump plug washer (see previous page step by step).
8. Replace spark plug
9. Start the engine
10. Replace the oil again after 30 mins usage