Rob Melotti gets one-to-one tuition on caring for a 4-stroke at the Honda Institute
Storage tips for small 4-stroke outboards
1. Lay the engine on the correct side
All portable 4-strokes have supports to indicate which side they should be laid on the floor. Incorrect storage will cause engine oil to leak out of the crank case. This makes a mess but only causes long-term damage if you fail to replace the lost oil before starting the engine.
2. Drain water cooling systems
The cooling galleries throughout the engine will naturally drain with the engine in the upright position out of the water. If you operate your engine in salt water, refer to the manual for how to flush the system through with fresh water. But if there is any danger of sub-zero temperatures while the engine is being stored out of the water, it is important to expel the last few drops from the cooling system as follows:
3. Preventing corrosion on cylinder bore and piston rings
Outboards are rarely stored in climate controlled conditions, so to prevent the cylinder bore and piston rings from getting rusty, take the following precautions: