Generally not a lot of doubt- I had a pool of coolant on the rocker cover after a high speed run and the engine spat coolant at me while it was running in my drive
Very easy to get these pumps reconditioned and I had mine done for the equivalent of US$35. Sunbeam Specs have a water pump you can buy but my understanding is that it is the 1600 water pump-although they say that this will fit a 1725 I'm not sure.Does any one else know? Interestingly my water pump was alloy and all the others I have seen have been cast-I'm not sure whats original or best.
Karl