Mark, Not sure if this still relevant. About a year ago I purchased 2x lister Start O Matics 6/1's from a chap way up in the Highlands. In fact, I got two one
... Run your engin as hot as possible without boiling your coolant, 211f or 99c . On sealed pressurised systems you gain 2 deg for every 1 psi. The CS was not
I was enquiring about the same subject 2 weeks ago & was advised 195 Deg F is what you should aim for. Get the temp up & you get better efficiency. Still a bit
 lads i am removing origonal cooling fan off cs startomatic and replacing with electric 12v ive brazed in a thermo switch socket in top hose castingÂ