There are two main types of preventative maintenance: general mechanical service (to keep everything tip-top) and "winterising" for storage or extended periods of disuse (in hot or cold weather!)
In this video I change the engine oil and oil filter on my Honda BF40 four stroke outboard, running an engine flush through it before draining the old oil.
Regular servicing of your outboard is an important part of keeping it running reliably. A bit of time spent checking it over in the workshop sure beats breaking down on the water.
Before an outboard motor is put away at the end of the season it is important to perform a few simple tasks to ensure that everything runs well when the weather warms up and you get ready to head back out on the water.
Anodes are blocks of zinc, aluminium or magnesium that corrode away so the metal of the motor and the boat doesn't. Outboards have them outside and hidden inside the water jackets, and when they're left too long the inside ones break up and block the cooling passages.
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