speedometer hose : air or water (115HP)

[erictra20]

Hi there
I have a 2004 Yamaha 115 and my speedometer is not working any more.
The hose seems to be connected properly.
I tried to blow a bit of air directly in the indicator and I can read a speed so I know it's working and the problem should be within the hose or the pitot tube.

What do I need to check also?

Is it air or water that should go through the speedometer hose?

Thanks

[bwheel54]

Try cleaning out the small hole located on the front of the drive housing above the prop. Just use a small drill and do it by hand- did mine this weekend and presto! This small hole can get clogged with debris!

[erictra20]

I'll try that thanks

[erictra20]

and it worked. The pitot hole was cleaned and the speedometer is just working fine...
Thanks

[whr121966]

Where exactly is this hole that can be cleaned. Pictures?????