Yamaha F50D Servise Manual - page 348
Maintenance
10-13
MNT
TIP:
9
If the oil appears milky or dirty, check for
and repair the cause, and then change the
oil.
9
If the engine oil is below the lower level
mark
a
, add sufficient oil until the level is
between
a
and
b
.
Changing the engine oil
Change the engine oil after the first 20
hours of operation or 3 months, and every
100 hours or at 1-year intervals thereafter.
Otherwise the engine will wear quickly.
The engine oil should be extracted with an oil
changer.
1.
Put the outboard motor in an upright
position (not tilted).
NOTICE:
If the out-
board motor is not level, the oil level
indicated on the dipstick may not be
accurate.
2.
Start the engine and warm up for 5–10
minutes.
3.
Stop the engine and leave it for 5–10
minutes.
4.
Remove the top cowling.
5.
Remove the oil filler cap
1
. Pull out the
dipstick
2
and use the oil changer
3
to
extract the oil completely.
6.
Add the correct amount of oil through the
filler hole. Put back the filler cap
1
and
the dipstick
2
.
NOTICE:
Overfilling the
oil could cause leakage or damage. If
the oil level is above the upper level
mark, extract until the level meets the
specified capacity.
7.
Leave the outboard motor for 5–10 min-
utes.
8.
Remove the dipstick
2
and wipe it clean.
9.
Insert the dipstick
2
and remove it
again. Make sure to completely insert the
dipstick into the dipstick guide, otherwise
the oil level measurement will be incor-
rect.
10. Recheck the oil level using the dipstick to
make sure the level falls between the
upper level mark and lower level mark.
1
Recommended engine oil:
4-stroke motor oil with combination of
the following SAE and API oil classifi-
cation.
API: SE, SF, SG, SH, SJ, or SL
SAE: 5W-30, 10W-30, or 10W-40
Engine oil quantity:
Without oil filter replacement:
2.0 L (2.1 US qt, 1.8 Imp qt)
2
3