Yanmar 1GM User Manual page 67

OPERATION, LUBRICATION, MAINTENANCE AND TUNE-UP
61
Transmission Oil Level Check
Check the transmission oil level on a weekly basis.
I. With the boat at rest in the water and the engine off, un-
screw the dipstick (Figure 39, typical). Wipe it with a
clean rag or paper towel. Reinsert the dipstick, but do not
screw it in. Pull out the dipstick and read the oil level on
the dipstick.
2. Add oil, if necessary, through the dipstick hole so the
oil level reaches the full mark on the dipstick. Use the oil
recommended in the preceding section.
Daily
Weekly
Every 50 hours
Every 100 hours
Every 250 hours
Every 300 hours
Every 500 hours
Every 1500 hours
Every 2000 hours
Annually
Ambient Temperature
Below 50° F (10° C)
50° - 68° F
W -
20° C)
68° - 95° F (20° - 35° C)
Above 95° F (35° C)
Model
1GM,1GM10
2GM,2GM20
3GM,3GM30
3HM,3HM35
Table 1 MAINTENANCE SCHEDULE
Check fuel level
Check engine oil level
Check battery
Check air filter
Check transmission oil level
Check drive belt tension
Check electrical wiring
Clean fuel filter
Change engine oil
Drain fuel tank
Replace air filter element
Replace fuel filter element
Change transmission oil
Replace engine oil filter
Adjust engine valves
Inspect thermostat
Inspect seawater pump
Replace thermostat
Replace freshwater (closed system) antifreeze
Table 2 ENGINE OIL VISCOSITY
Oil viscosity
1OW, 20W or 20/20W
20 or 20/20W
30 or 40
50
Table 3 ENGINE OIL CRANKCASE CAPACITY
Oil capacity
1.4 qt. (1.3 L)
2.1 qt. (2.0 L)
2.8 qt. (2.6 L)
5.7 qt. (5.4 L)