Flashing icon on Tachometer

The icon marked with green is flashing on my tachometer, but neither of my manuals explains the meaning of it.

Can you help me?

Engine is a F115, '03

Thanks

[IMG][/IMG]

Total engine hour is 42.

Deos the icon blink with predefined intervals, like every 50 hour because of service?

[boats.net]

If it's a Yamaha digital and the icon is on bottom right side of tach then the dipswitch in back of tach may be set for 2 stroke engine.

If it's a Yamaha digital and the icon is on bottom right side of tach then the dipswitch in back of tach may be set for 2 stroke engine.

See the picture linked in my first post.

the owners manual for the gauges should have it in there

Unfortunately I don't have the manual for the tacho gauge :-(