Help needed with speedo on Gobbi 425

[Simond S]

Help.

I have a raymarine multi display and also i have a ST60 which should show speed and depth.

The multifunction shows sog when on the data screen, but when on charts it doesnt.

The ST60 shows the depth correctly, but it doesnt show speed.

Would anyone know where i would find the impeller (or whatever i need to find) to see if this is an easy fix or clean.

The vessel is a 2005 gobbi 425 sc on kad 300's

Many thanks

Simond

Ps. Why does my screen show the boat pointing the wrong direction?

 

[Sishoe]

I used to have a Gobbi 425sc and at one point had problems with the depth function on the ST60.
The sender is centrally mounted externally at the base of the transom and monitors speed over water, depth and sea temp. The spinny wheel thing that does the speed can get a bit clogged with weed or anti foul.
After buying a new sender my problem tuned out to be a knackered head unit.
Great boat !!!

 

[Simond S]

Thank you, i'll have a rummage.

Boat coming out in two weeks for a scrub but hopefully clean it in situ before then.

Loving the boat, seems to do everything we want out on the water and an amazing place to stay and party.