k0ua
Epic Contributor
The 2501/3301/3901 all use the BH77. Only the 4601 can fit the BH92.
I have an L3200 (now the 3301), which is the same basic tractor as the 2501 but with 32HP instead of 25. It is adequate for everything the OP described, but sometimes I wish I had more power when pulling a box blade full of heavy soil, as the tractor has to work hard. So in retrospect I probably would have gotten an L3800 (now the 3901). But that issue only shows up in about 2% of my use of the tractor. For the other 98% it's fine. When box blading gravel or dry/light soil, it's just fine.
So I'd say the 2501 is probably fine for most of what you describe. The 3301 would be better if you need more PTO horsepower, and the 3901 would be best if you need even more PTO horsepower and/or plan to do heavy/difficult grading work with a box blade or similar.
I should note that I have not driven an L2501. The engine is actually a slightly larger 3-cylinder than in my L3200, despite the lower HP, and it makes its rated power at 2200 rpm versus 2800 rpm on my L3200. So it may be that the L2501 is a de-rated "sleeper" with gobs more torque down low to make up for the HP rating. I would not at all be surprised if this was a clever strategy on Kubota's part to meet Tier IV final requirements but still offer a tractor with good performance. I'd want to drive both L2501/3301 back to back to see how they feel.
I have also wondered what the 2501 could be "turned up" to with an injection pump tweak.