Re: why bad reputation
I've owned several older Chrysler outboards over the years, and a couple of Force motors. As a rule of thumb, their one of the easiest to work on, are rock solid motors if properly cared for, and parts aren't too big of a problem as of yet.
They may not make as much power as a comparable year OMC or Mercury, but they more than get the job done. Chrysler and Force were always an older design, they didn't make the constant changes that other brands did over the years, they seemed to build a solid motor and stuck with it. The later models seem to have some odd electrical issues and I must say I'm much fonder of any motor that uses a single plug hook up vs. loose wires, but that's only something you deal with during the initial install.
As far as reliability, I don't see them as being any different than any other 20 year old outboard.
I currently have a 1973 9.8hp, 1966 20hp, 1966 50hp, 1971 25hp, 1987 120hp, and most recently a 1989 15hp, plus many OMC and various Mercury outboards. My favorites are the older Chrysler motors, and 1980's era OMC motors but won't turn down a clean Force or newer Chrysler.
From a design or quality of design standpoint, I don't see them as being at all inferior to any other brand, maybe a bit dated in design but if we were to think like that, no one would every value vintage autos as much as we do either. I think most of the Chrysler and Force engines are pretty much just 1960's technology carried over as far as it would carry them, which in my opinion isn't a bad thing as it means a large period of parts interchangeability and proven and perfected designs.