This ( and almost ALL modern engines ) require some sort of computer to run, in the case of the M112 engine it is the ECM, or PCM, or PTCM module. ( I've seen it called by all 3 terms )
This controls the spark, fuel, throttle body and timing.
It would be a daunting task to wire one up with all the required inputs, not saying impossible,
but extremely NOT EASY !