[jhv48]

With a 180 degree thermostat and an appropriately sized radiator with appropriately sized fully shrouded puller fans, your engine temps should never get above the point where the fans come on. Generally that point is around 195 degrees.

If the temp still climbs after the fans are on, then your cooling system is suspect. A good sized radiator with a shrouded puller fan is capable of cooling an engine much bigger than the one you're running. I suspect either your fan isn't pulling enough air, you have no shroud around it or your radiator is too small.

All this assumes that you've checked your thermostat to make sure it's opening at the prescribed temp.