I just put this engine back together. The impeller is new. I am running it in a 55 gallon barrel, but it is running hot, over 200 degrees on the head. My barrel only allows the water to set approximately 3" above where the lower unit bolts. Would be above the water pump housing, but it's lower than the inspection window where you would disconnect the gear select lever. My question, is this too low, for the water to be properly circulated through the motor? Just too low of a water level. If I remove the T-stat cover, and rev it up, I will eventually get water to spit out, but only after revving it for a few seconds, at idle, no way. I am just making sure this is normal due to the water level. Thanks in advance for your opinions.