Hi Bills.
Does that mean you are using a standard prop mounted backwards? On my pusher Canards the engine will overheat on the ground. In the air it is OK. I use OS 46FX and AX with a APC 11x6 pusher prop. When I adjust the engine with the two needle valves I replace the pusher prop with an APC 11x6 standard prop. I can then adjust the engine as long as it takes. Then I replace the prop and take off. Could be you are not getting all out of your engine. With your canard wing in place, do you readjust the CG as needed for a canard?