Hi and thanks, its pumping great or so it seems but I took the thermostat out and tested it and the little pit on the top didn't move it is stuck flush with the top of the stat.(I think the stat is seized closed) It has a vernatherm type of set-up which has a number of parts, is there a replacement type of thermostat which supersedes these stats? Thanks for the help,
I work away so I will check the compression numbers when back at the boat next weekend, to fit a new water pump kit is a nightmare as we have no where to retrieve the boat where we are situated without a great deal of hassle.
Bill.