MUFC
If Euromanx are only getting an average of 25 pax per flight, then a J41 is the ideal a/c, in terms of profit for the airline on this route, and if it is only a 1 hr flight people will not complain too much, I mean 9 people have no body sat next to them anyway as regards to comfort, and the J41 is faster than a Dash 300.
Can you imagine the logistical nightmare of putting an a/c into the Isle of Man with only an extra 21 seats to operate on only 2 flights per week on Friday and Monday, no engineering support on the SAAB, crew accommodation, empty legs to get the a/c in to position from another base.
There is your extra profit gone already