I have an old Perkins
6354 that i converted to fresh water
mani-cooler. In the process discovered I had no thermostat and the temp sender was the incorrect one. Ordered a Thermostat (not very common any more) and put it in. Started over-heating so i took it out and tried it in hot water
. it was opening at the correct temp but not a lot. So decided to look into things and discovered that the thermostat core
was the exact same dimensions as an ingersol rand screw compressor
. Thermostat core
cost 5usd and you can choose from several temperatures. Fitted and now opens all the way and all is rosy Saved another expensive and slow shipping delivery
from the UK . Strange what you find when you start looking!