I had a B3300SU. I put 400 engine hours on it, then sold it for nearly-same-size but much heavier Kubota
L3560.
The BIG ISSUE for me is B3300SU lateral stability. The B3300SU was the only 'B' with big wheels so it is the most laterally 'tippy' of the "B"s. So be EXTRA prudent carrying heavy loads in the FEL bucket, otherwise the potential to roll it is there.
Fill the rear tires 3/4 with liquid, to lower the tractor's center-of-gravity.
Whenever moving a heavy load in the B3300SU bucket have ample counterbalance mounted on the Three Point Hitch. A 500 to 600 pound Box Blade is one example of ample counterbalance, and probably the most common implement utilized as counterbalance.
You can power a 5' Rotary Cutter. You can pull a Disc Harrow with 18" diameter pans, however most will probably be happier with a PTO powered Roto-tiller, over a light Disc Harrow. You can pull a 12" X two bottom moldboard plow at full throttle, but you need a contemporary plow, sized to this "intermediate" frame tractor, such as plows sold by everytfhingattachments.com. Old plows, designed for the larger Ford 8N/2N/9N, have a main beam that is too long and collide with the B3300SU bodywork.
Small issues: The HST transmission has a high pitched whine. Using Kubota "Super UDT2" hydraulic fluid reduces the whine significantly. I always wore ear plugs operating the B3300SU.
I believe all B3300SU tractors came with hydrostatic (HST) transmission. Highly desirable, even with the whine.
No Position Control on the Three Point Hitch hydraulic lift. Instead, B3300SU has QIV, also written as 1/4" valve. Personally, I liked the QIV, especially when using my Moldboard Plow and Disc Harrow. QIV only fell short when operating a Rotary Cutter, and you work around this handily with $30 limit chains. Few B3300SU owners read how to adjust the QIV in the Operator's Manual, where QIV adjustment is clearly explained. (The alternative to QIV is Position Control, which common wisdom holds to be better. To me, QIV and PC are equally good.)
I did not like the factory turnbuckle Lower Link stabilizers. I had Mark Hodge at Stabilworks fabricate pinned replacements for me. I believe pinned stabilizers are now available as an option from Kubota.
The Kubota B3300SU was a tractor-loader
package. If you encounter a B3300SU WITHOUT an FEL I would inquire what happened to the loader. A B3300SU without a loader is a strange duck.
If this is a hobby farm where making a profit is not your primary concern a 'B' may do you. If you need to make a profit which requires getting some farm work accomplished in a finite amount of time, relative to the weather, I would look for a heaver Kubota 'L' for ten acres of farm land.
Your Kubota
BX1800 weighs about 1,350 pounds, bare tractor. The B3300SU weighs about 1,900 pounds, presumably including the loader. That is not much difference. Tractor weight is much more important than tractor horsepower in defining tractor field capability. The 'L' series start at 2,500 pounds, bare tractor.
The quality of components, fit and finish on the B3300SU is high, fully equal to other Kubota tractors.
