Yamaha GRIZZLY ULTRAMATIC YFM660FP Owner's Manual page 76

Clock mode
Pushing the "
play between the clock mode "CLOCK" and the
hour meter mode "HOUR" in the following order.
CLOCK→HOUR→CLOCK
To set the clock
1. Push the "
seconds and the clock will start flashing.
2. Set the hours by pushing the "H" button.
3. Set the minutes by pushing the "M" button.
4. Push the "
4-13
"/" " button switches the dis-
"/" " button for at least two
"/" " button to set the clock.