but at this company the Maint Mgr wants 3 seconds with the throttle full open.
Then have the maint mgr start the engines..the pilot is responsible to follow all approved procedures...so have the maint mgr publish his ideas as an approved procedure....on that note....I flew those for five years, and used the the following technique..
1 Throttle full forward
2 Boost pump on
3 Mixture advanced to full forward and back to idle cut-off over a count of 5 sec
4 Boost pump off
5 Throtttle back to 1/2 inch forward of idle
6 Crank the engine, at first firing advance the mixture to full rich quickly
7 After the engine stabilises, lean mixture slightly and allow eng to warm up with cowl flaps closed at 1000 rpm