Trailer the outboard motor in the tilt position using a motor support device such as a transom saver bar. consult your Yamaha dealer for further details.Yamaha Outboards Maintenance

Storing Outboard Motor

When storing your Yamaha Outboard Motor for prolonged periods of time (2 month or longer), serveral important procedures must be performed to prevent excessive damage.It is advisable to have your outboard motor serviced by an authorized Yamaha dealer prior to storage. However, you the owner with a minimum of tools, can perform the following procedures.

  • To prevent problems which can be caused by oil entering the cylinder from the sump, keep the outboard motor in the attitude shown when transporting and storing it. If storing or transporting the outboard motor on its side(not up-right), put it on a cushion after draining the engine oil.
  • Do not place the outboard motor on its side before the cooling water has drained from it completely, otherwise water may enter the cylinder through the exhaust port and cause engine trouble.
  • Store the Outboard motor in a dry, well ventilated place, not in direct sunlight.


Flushing with the Flushing Attachment

1. Wash the outboard motor body using fresh water.

2. Fill the fuel tank with fresh fuel and add one ounce of “Yamaha Fuel Conditioner and Stabilizer” to each gallon of fuel.

The use of “Yamaha Fuel Conditioner and Stabilizer” eliminates the need to drain the fuel system. Consult your Yamaha dealer or other qualified mechanic if the fuel system is to be drained instead.

3. Remove the top cowling and propeller.

4. Install the flushing attachment over the cooling water inlet.

Do not run the engine without supplying it with cooling water. Either the engine water pump will be damaged or the engine will be damaged from overheating. Before starting the engine, be sure to supply water to the cooling water passages.

Avoid running the outboard motor at high speed while on the flushing attachment, otherwise overheating could occur.

flushing attachment

5. Cooling system flushing is essential to prevent the cooling system from clogging up with salt, sand or dirt. In addition, fogging/lubricating of the engine is mandatory to prevent excessive engine damage due to rust. Perform the flushing and fogging at the same time.


  • Do not touch or remove electrical parts when starting or during operation.
  • Keep hands, hair, and clothes away from the flywheel and other rotating parts while the engine is running.

6. Run the engine at a fast idle for a few minutes in neutral position while supplying fresh water.

7. Just prior to turning off the engine, quickly spray “Yamaha Stor-Rite Engine Fogging Oil” alternately into the intake silencer or the fogging hole of the silencer cover, if equipped. When properly done, the engine will smoke excessively and almost stall.

8. Remove the flushing attachment and wipe off any excess water.

9. Install the top cowling and propeller.

10. Drain the cooling water completely out of the motor. clean the body thoroughly.

A flushing attachment is available from your Yamaha dealer.


1. Grease the spark plug threads and install the spark plug and torque to proper specification.
2. Change the gear oil.Inspect the oil for the presence of water that indicates a leaky seal. Seal replacement should be performed by an authorized Yamaha dealer prior to use.
3. Grease all grease fittings.

Cleaning and Anticorrosion Measures

1. Wash down the exterior of the Outboard motor with fresh water and dry off completely.
2. Spray the outboard motor exterior with “Yamaha Silicone Protectant”.
3. Wax the cowling with a non-abrasive wax such as “Yamaha Silicone Wax”.