Maintenance
EMU28301
Procedure
EMU28372
Flushing in a test tank
1.Wash the outboard motor body using fresh water. For further information, see page 34.
2.Fill the fuel tank with fresh fuel and add one ounce of “Yamaha Fuel Conditioner and Stabilizer” (Part No.
NOTE:
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 engine top cowling and si- lencer cover.
4.Install the outboard motor on the test tank.
1
2
ZMU02051
1.Water surface
2.Lowest water level
5.Fill the tank with fresh water to above the
level of the
ECM00300
CAUTION:
Do not run the engine without supplying it with cooling water. Either the engine water pump will be damaged or the en-
gine will be damaged from overheating. Before starting the engine, be sure to supply water to the cooling water passag- es.
ECM00290
CAUTION:
If the fresh water level is below the level of the
6.Cooling system flushing is essential to prevent the cooling system from clog- ging up with salt, sand, or dirt. In addi- tion, fogging of the engine is mandatory to prevent excessive engine damage due to rust. Perform the flushing and
fogging at the same time.
EWM00090
WARNING
●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.
7.Run the engine at a fast idle for
8.Just prior to turning off the engine, quick- ly spray “Yamaha
00)alternately into each carburetor or the fogging hole of the silencer cover, if equipped. When properly done, the en- gine will smoke excessively and almost stall.
9.Remove the outboard motor from the test tank.
10.Drain the cooling water completely out of the motor. Clean the body thoroughly.
11.Install the silencer cover/cap and top cowling.
33