PoP wrote:
I've just done a search on the web. Preheaters are available for £250
and upwards - which is quite a lot of money. I think I'll stick to my
putting a small heater under the engine compartment.

Our standby genny has a small immersion heater in a steel can and
circulates 50 degree water by convection round its block, try genny
suppliers for one off an old unit?

Niel.