"I am using old firmware 2.74 to be precise 
so what you think I should do is upgrade the firmware and then use this setting?"

"@Dave Smith

Hi Dave thanks for the reply

I switch my radio on first then plug plane
then I wait until plane has got solid blue for gps lock
then I go to mission planner and click connect
motor starts up for a couple of seconds and then stops

I…"

"Hi 
When I connect to my ground station my plane's motor starts to run for about 3 seconds and then stops again.

I don't know how to fix this problem, it is very dangerous 

If some one knows how to fis this please help

Its and apm 2.6"