2000 E200FCXSSC 200 hp Evinrude Ficht. I would appreciate any help I can get on removing the plastic thermostat covers. I seem to have one thermostat stuck in the open position, which prevents that bank of cylinders from warming up to perating temperature. I tried to remove one and about 150 ft.lbs the hex part twisted off' Is there a particular way that it is supposed to come off? Also is there a special socket made for this? Does anyone know of an easy way to get them off ? I have had this motor since new in May of 2000 and the thermostats are the originals. Rig is a 192 Scout V bottom 19 ft with the 200 hp Rude. The rig hasn't been used much in all these years, it only has 81 (original) hours on the motor. I just ordered the factory service manual and should get it sometime next week.

Also would like input on the Ficht diagnostic software V1.42B sold by princecraft196. Is it any good?

Thanks in advance for any and all help.