Is it safe to change an Indian 16A to 250 V round pin plug to a UK 3 pin 13 Amp as used in 220-240 V Kenya
So motor is 125W, heater is 1800W, add those together we get 1925W.

Pump, controls etc may add a little but it should still be well within what a 13A plug can supply. 

I have no idea what wiring in kenya is like though. It's not unheard of in some countries for power circuits to be rated lower than the sockets on said circuits.