I decided on a 140 for my Livingston Viking 192 a couple of years ago. Did endless research before deciding.
They had a terrible (& well deserved) rep due to dissimilar metal corrosion on the pre 2007 (iirc) models. Once they sorted that out, their rep for reliability is among the best in the biz.
I am certainly happy with mine!
The boat came with a Merc 125 2+2 style. Described to me by an old hand with 2 stroke outboards as “The worst idea Merc ever had)
After that old shaky, stinky, gas guzzling, oil dribbling pig, I’m in the lap of quiet, fuel efficient luxury with my shiny new Zook.
The boat performs almost exactly the same with the 140 as it did with the Merc 125.
A buddy of mine bought a well used 2000 140 Johnson / Suzuki for his beachcomb boat last year. The brass plugs had been modded out early on, so it didn’t have the common corrosion problems. Even at 20 years old, with lots of hours, the thing fires right up & runs like a top. Plenty of power for him & he’s super impressed with the fuel burn.