The water out of the holes will warm. It takes a wide open run with the correct thermostat to get above warm. Especially in cold water. How do you know the thermostat is not installed?
2 different carb covers for those motors, 1 is cheap and 1is not. And I do not believe the needles are interchangeable. There is also an update kit that comes with both needles. The kit is pricey
0433973
I use these
https://www.amazon.com/s?k=ctek+charger&hvadid=616863174213&hvdev=t&hvlocphy=9019049&hvnetw=g&hvqmt=e&hvrand=16796597928498963057&hvtargid=kwd-2535377603&hydadcr=24663_13611861&tag=googhydr-20&ref=pd_sl_4oayn7jj16_e