Where on the engine is the temp sender for the gauge?
I ask because my 250 always ran hotter then I liked till I moved the sender out of the head and placed it right under the thermostat. I now runs 15 degrees cooler! When in the head, the sender is very close to #1 and # cylinders. When working on the water pump, be careful of the upper right bolt, its right by the first head bolt and there is barely enough metal there for both of them. Head bolt torques to 85, water pump bolt is just tight enough not to leak.
