Did more ground testings of CS 707 and used very proper professional procedures of starting engines yet I have no problem starting engines 2, 3, and 4 on FIRST TRY.

Starting engine 1 is more tricky and problematic. It never starts on first try and it always takes me THIRD or FOURTH try to get engine 1 started and running.

Any advice or tip or suggestion would be appreciated for starting engine 1 on FIRST try like other three engines instead of third or fourth try.

Regards,

Aharon