Hi Dave,

It looks to me you have covered all the bases around a thermostat or just plain cold weather without a long enough drive.

I know very little about a 900 series except their body shape and maybe the drivetrain.
I have this question though about a turbo 900 having electric fans?

I can only figure that it might have a A/C condenser fan or it could also be a helper fan since it’s a foot fancier turbo. 😊

Maybe the owner doesn’t realize that it’s not supposed to run all the time like a viscous clutch driven can appear to do.
Maybe if it doesn’t have all electric maybe the viscous clutch is running solid and its thermostat spring is stuck.
He needs to give it a spin manually before and after a hot engine run. The radiated heat should make it spin more freely than when it’s cold.

He said it was ok this last summer but as the world tilts and so should the logic scale as he has raised the point of variations with the term lately?

Phil