Good day guys, first post. I have this fine 03 Evinrude Ficht 250, 150 hours, software updated, new impeller, plugs, filters, etc. Have replaced thermostats with warmer E-TEC thermostats. I am running 140-150 at idle and low speeds. At over 2500 rpm, the temp drops considerably, into the 100-110 range. Is this normal?? As an auto tech, the purpose there is to maintain the temp steady. I admit I never noticed the temp dropping before replacing the stats, but I also was not paying as much attention. Any Ideas??