Hi Matt
sounds like the motor is running Hot
the 1.7 needs lots of cooling or it vaper locks.
One way to find out if this is the case,,check your motor after the first run if it continouse to get very hot on the ground after the flight
and becomes hard to start and sometimes transfers lean,, this is your problem.
take your cowling off < keep your glow driver off of the motor,>,, pull the fuel line going to the injector in back of the head and spin the prop till you get fuel coming out of the line ,,,this will displace the vaporand help coo the motor.
then the motor will run fine after you get fuel back in the line.
If this is what you are experiancing you don`t have enough cooling to the Motor
open the front cowling and exit holes.
If you have to, add foam around the cowling forcing the intake air around the Engine
this should fix your problem.