I have a Raymarine ST4000 (not +) wheelpilot and I find that when the
clutch is disengaged and I am steering manually that the belt inside
the unit "sticks" to the rim of the casing making the boat almost
unsteerable.

I have had the unit "repaired" by a Raymarine dealer (belt and cluch
mechanism replaced) but this made no difference.

Does anyone know if this can be cured? Would WD40 or similar on the
belt resolve things or would this let the belt slip when used in auto
mode?

I am reluctant to buy the ST4000+ upgrade at a cost of =A3400 when I
have already paid out for a repair.

Incidentally does anyone else have problems with Raymarine equipment?
In addition to this wheelpilot a previous tillerpilot, wind speed and
log instruments have all needed expensive repairs at about 4 years
old... Needless to say I will try to avoid this brand in future!

Stuart Eastland