It is the economy, hope you didn't expect too much. JD made those models to cover the market share of the cheap to the expensive models of many different brands.
2024 Cub Cadet Ultima ZTXS5 54, 2007 John Deere 2520, 1989 John Deere 185, 1960 Panzer T70B
I've got to agree with you. I inherited this 90's Sabre (which is basically the same thing as a D100, except it is the "economy" version of the economy model) maybe 10 years ago. It's so bad that JD was so ashamed that they (barely) put their name in little teeny letters below the Sabre name on the side and used a different shade of green.
I hit a water meter cover (I know, dumbass thing to let happen) with it some years back and the deck folded up like tin foil. Also cracked the spindle housing. So I thought it was done for.
But, after hammering the deck back into shape and installing new blades, the thing has soldiered on and still mows acceptably well (cracked spindle and all) for trimming. The plastic hood is broken loose from the mounting bracket/hinge and is bolted together with carriage bolts. The transmission is weak and the engine leaks and burns oil, but still runs, mows and tows the lawn cart.
It may be junk, but I keep it around because sometimes it's just the perfect beater for the job at hand