Procedure - Yamaha Z250 Owner's Manual

for prolonged periods of time (2 months or
longer), several important procedures must
be performed to prevent excessive damage.
This is especially important for your oil injec-
tion equipped outboard motor due to the lean
oil ratios used at idle prior to shutting the en-
gine off for the season. It is advisable to have
your outboard motor serviced by an autho-
rized Yamaha dealer prior to storage. How-
ever, you, the owner, with a minimum of
tools, can perform the following procedures.
ECM01070
CAUTION:
Do not use any chemical goods contain-
ing Silicon, Phosphorus, or Lead. Other-
wise the oxygen sensor for the Electronic
Fuel Injection system could be damaged.
Consult your Yamaha dealer for details
on the use of chemical goods for storage.
EMU28301

Procedure

EMU30001
Flushing with the flushing attachment
1. Wash the outboard motor body using
fresh water. For further information, see
page 52.
2. Fill the fuel tank with fresh fuel and add
one ounce of "Yamaha Fuel Conditioner
and Stabilizer" (Part No. LUB-FUELC-
12-00) to each gallon of fuel.
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 top cowling and propeller.
4. Install the flushing attachment over the
cooling water inlet.
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.
ECM00310
CAUTION:
Avoid running the outboard motor at high
speed while on the flushing attachment,
otherwise overheating could occur.
1. Flushing attachment
5. Cooling system flushing is essential to
prevent the cooling system from clog-
ging up with salt, sand, or dirt. In addi-
tion, fogging/lubricating of the engine is
mandatory to prevent excessive engine
damage due to rust. Perform the flush-
ing and fogging at the same time.
EWM00090
WARNING
Do not touch or remove electrical parts
G
when starting or during operation.
Keep hands, hair, and clothes away
G
from the flywheel and other rotating
Maintenance
49