Been there done that with the fuel light, already. This time it was the temp. I don't think the sled got that hot, it wasn't boiling and wasn't spitting out any coolant. The snow conditions were poor, frozen no powder to get to the exchangers. If you were to go inline where would you want to place it. Which way does the coolant flow from the bottle to the head or from the head to the bottle? Also what is the max safe temp for the coolant. I don't know what temp the light comes on at so I got a little nervous came on several times and went out. Also ran sled very hard after that and the light never came back on. Ran another 50 miles no light. Thanks TD