IXEG 737-300 Engine Start

[gregmorgansen]

I recently re-installed the IXEG 737-300.  Upon starting the first flight, I was surprised to find that Engine 1 was starting by itself.  In addition, engine 2 upon stabalizing at idle was running 5% less than engine 1.  Has anyone else had these issues, and, if so, what is the fix if any?

Greg

[gregmorgansen]

The solution to this problem is to make sure that the magneto switch is set to "OFF" if you are using the Alpha yoke by Honeycomb.  If it is on, it will start engine #1 by default.  Engine #1 will also be producing 5% or so more power than engine #2 when it is started.  Interestingly, if the magneto switch is on and both engines are running, the autothrottle will compensate for the 5% difference and throttle up the #2 engine to match #1.  

Greg

[Litjan]

Thanks for letting us know the reason...I think the magneto switch is probably assigned to "start switch" engine no.1 and will therefore allow bleed pressure to run the starter for the left engine. Normally the starter will flip to the OFF position automatically, but just like in the real aircraft, if you HOLD it open, it will continue to be aspirated by bleed air and "help" the engine (which will then run with a higher N2).