Hi all

Just recently the warning alarm on my 1984 raw water cooled Yanmar 2GM20 has started chirping at low revs and the overheat light is also flashing in sync while the alarm is chirping

I don't think that the engine is overheating is this can happen not to long after start up when the engine is still cold

There is plenty of water flow out of the exhaust at low revs and when it happens if I increase the revs it will stop

I have googled it and there are other cases of it happening and some say it is a fault with the panel

Any thoughts would be appreciated

Regards Don