Kubota L3970 Premium · FLAIL MOWERS
The L3970 Premium’s 30.9 PTO hp clears the 30-hp minimum of WoodMaxx’s 70-inch FM-78 family by 0.9. Its two power figures split the mowers rated without a basis: Farmry’s LFS range (15–35 hp) includes 30.9 PTO hp but not 39 engine hp, and Land Pride FM2560 (33 hp) is the reverse. The L3770 Deluxe, on the same frame at 28 PTO hp, misses FM-78 by 2.
By Acreage Equipment · Reviewed November 8, 2026 · Specification research, not a field test
PUT THIS GUIDE TO WORK
See published mismatches and the checks still needed.
BEST MATCHES FOR THE L3970 PREMIUM
19 of 23 flail mowers we track pass the published power, hitch and speed screen. Each still has a detail to confirm with the seller.
Flail mowerWoodMaxx
70″ cutting width, inches · 30–65 PTO hp · Hammer blades only
Resolve the conflicting published specifications for the exact model revision.
Flail mowerWoodMaxx
70″ cutting width, inches · 30–65 PTO hp · Hammer blades only
Confirm rear remotes, hydraulic flow and pressure requirements.
Flail mowerWoodMaxx
70″ cutting width, inches · 30–65 PTO hp · Y-blades only
Confirm the complete operating weight; a shipping weight cannot establish the attachment load.
Flail mowerTMG Industrial
60″ cutting width · 30–60 hp · basis unclear
Ask the manufacturer whether the horsepower range means engine or PTO power.
Flail mowerFarmry
61″ cutting width · 15–35 hp · basis unclear
Ask the manufacturer whether the horsepower range means engine or PTO power.
Flail mowerFarmry
53.1″ cutting width · 15–35 hp · basis unclear
Ask the manufacturer whether the horsepower range means engine or PTO power.
13 more possible options in the full comparison table.
THE DECISION IN NUMBERS
Tractor reference: Kubota L3970 Premium, 30.9 PTO hp at 2,300 rpm and 39 gross hp (SAE J1995); SAE Category 1; 59.8 in. overall width at minimum tread; 2,646 lb at 24 in. No Kubota manual flail limit was reviewed.
Scroll the table sideways on smaller screens.
| Mower | Published requirement | Result on 30.9 PTO hp | Result on 39 engine hp |
|---|---|---|---|
| WoodMaxx FM-78 hammer / FM-78H / FM-78 Y | 30–65 PTO hp; 70-in. cut | 0.9 above minimum | PTO-rated |
| TMG TFM60 | 30–60 hp, basis unspecified; 60-in. cut | 0.9 above minimum | 9 above |
| Farmry HFS87 | 30–85 hp, basis unspecified; Category I/II; 87-in. cut | Inside (0.9 above 30) | Inside |
| Farmer-Helper FH-EF95 / EF105 / EF125 | 15 / 16 / 20–45 PTO hp; Category I; 37 / 41 / 48-in. cut | Inside | PTO-rated: engine hp not used |
| Farmry LFS45 / LFS53 / LFS61 | 15–35 hp, basis unspecified | 4.1 under maximum | 4 over: excluded |
| Land Pride FM2560 (hammer) | 33–80 hp, basis unspecified | 2.1 below | 6 above |
| WoodMaxx FM-62 hammer / FM-62H | 24–45 PTO hp; 55-in. cut | Inside (+6.9) | PTO-rated |
| Farmer-Helper FH-EFGC155 | 25–65 PTO hp (page) | Inside (+5.9) | PTO-rated |
| Farmry LFP47 | 25–45 hp, basis unspecified | Inside | Inside |
| Land Pride FM2572 / FM2584; WoodMaxx FM-54 Y | 42 / 49 hp minimum; 15–25 PTO hp | Excluded | Excluded |
WoodMaxx’s current manual rates FM-78, FM-78H and FM-78 Y at 30–65 PTO hp. The L3970’s 30.9 clears that by 0.9; Kubota rates it at 2,300 rpm, and the PTO reaches 540 at 2,299, so the rating applies at standard PTO speed. A 0.9-hp margin has no room for a lower dealer figure. Ask WoodMaxx to confirm the pairing, especially for dense growth.
Farmry rates the LFS mowers at 15–35 hp and Land Pride rates FM2560 at 33–80, neither naming engine or PTO power. On PTO power, the L3970 is inside LFS and 2.1 short of FM2560. On engine power, it is 4 over LFS and 6 inside FM2560. Each maker has to say which figure applies. The comparison below sets LFS61 against FM-78, the mower with a clear PTO rule.
Kubota lists the L3970 at 59.8 inches at minimum tread, with rear tread settings from 47.2 to 58.3 inches. FM-78 cuts 70 inches and covers the tires at any setting; LFS61 cuts 61 and TFM60 60, close to the tractor’s overall width. FM-62’s 55-inch cut may not cover the rear tires at the wider settings.
At 2,646 lb at 24 inches, lift is not the constraint: FM-78 is 880 lb in WoodMaxx’s manual, TFM60 650 lb on TMG’s page and LFS61 421 lb with shaft. Complete operating weight and front ballast still need checking against the operator manual.
Farmry rates the HFS87 at 30–85 hp without saying whether that is PTO or engine power, lists Category I and II, cuts 87 inches and weighs 1,299 lb with the shaft. The Kubota L3970 Premium’s 30.9 PTO hp and 39 engine hp are both inside that range, though PTO power is only 0.9 hp above the minimum. Its published lift at 24 inches, 2,646 lb, carries that weight with 1,347 lb to spare; check front ballast all the same. Its gearbox rating, 50 hp, is not below this tractor’s PTO power. The 87-inch cut is 3 inches wider than Land Pride’s FM2584. Farmry’s page listed it at $4,499 on November 14, 2026.
Farmer-Helper rates its standard-duty FH-EF mowers by PTO power, all to 45 PTO hp with a 45-hp gearbox: the EF95 (37-inch cut) from 15, the EF105 (41-inch) from 16 and the EF125 (48-inch) from 20. They carry Y-blades for grass and light brush. The Kubota L3970 Premium’s 30.9 PTO hp is inside all three. Its published lift at 24 inches, 2,646 lb, carries even the 390-lb EF125 with 2,256 lb to spare. Betstco listed them at $1,462, $1,547 and $1,632 on November 14, 2026, with the PTO shaft included.
THE SCREEN, WITH ITS LIMITS VISIBLE
No pairing below is manufacturer-confirmed. “Preliminary” still requires implement limits, load center, ballast, hitch geometry and shaft checks.
Initial specification screen only. Scroll the table on small screens. Read the product page for every remaining check.
| Attachment | L3970PRM · HST Plus · 3 ranges · 4WD · ROPS/Cab30.9 PTO hp |
|---|---|
| Farmry LFS45 →355 lb · Net weight WITH PTO shaft, current LFS manual Rev 1.7 p18 | Needs specification reviewAsk the manufacturer whether the horsepower range means engine or PTO power. |
| Farmry LFS53 →395 lb · Net weight WITH PTO shaft, current LFS manual Rev 1.7 p18 | Needs specification reviewAsk the manufacturer whether the horsepower range means engine or PTO power. |
| Farmry LFS61 →421 lb · Net weight WITH PTO shaft, current LFS manual Rev 1.7 p18 | Needs specification reviewAsk the manufacturer whether the horsepower range means engine or PTO power. |
| TMG Industrial TMG-TFM60 →650 lb · Product-page operation weight; manual gives conflicting 270 kg (about 595 lb) | Needs specification reviewAsk the manufacturer whether the horsepower range means engine or PTO power. |
| Farmry LFP47 →464 lb · 464 lb including PTO shaft on the product page; current Rev 1.3 manual lists 210 kg / 463.7 lb. Shipping weight is a separate 671 lb. | Needs specification reviewAsk the manufacturer whether the horsepower range means engine or PTO power. |
| TMG Industrial TFMS50 →660 lb · Product-page operation weight: 660 lb. Manual structure weight: 300 kg (about 661 lb); shaft and fluid inclusion are not explicit. Shipping weight: 770 lb. | Needs specification reviewAsk the manufacturer whether the horsepower range means engine or PTO power. |
| WoodMaxx FM-54 · Y-blades →408 lb · Current 2025-and-newer manual p40 lists 408 lb product weight without stating shaft inclusion. Page instead says 410 lb mower-only plus a 39 lb shaft. Do not treat 408 lb as a verified complete operating assembly; confirm delivered Y-blade weight. Shipping page figure is 500 lb. | Published mismatch30.9 PTO hp exceeds the published 25 hp range. |
| WoodMaxx FM-62H · Hammer blades →860 lb · Current 2025-and-newer manual, printed p40 / PDF p41: 860 lb product weight; shaft/oil/packaging inclusion is unstated. Page instead lists 716 lb mower-only plus a 39 lb shaft. Shipping is separately labeled 860 lb. Do not treat the manual number as verified complete operating weight; confirm delivered hammer assembly. | Needs specification reviewConfirm rear remotes, hydraulic flow and pressure requirements. |
| WoodMaxx FM-78H · Hammer blades →968 lb · Current 2025-and-newer manual, printed p40 / PDF p41: 968 lb product weight; shaft/oil/packaging inclusion is unstated. Page instead lists 804 lb mower-only plus a 39 lb shaft. Shipping is separately labeled 1000 lb. Do not treat the manual number as verified complete operating weight; confirm delivered hammer assembly. | Needs specification reviewConfirm rear remotes, hydraulic flow and pressure requirements. |
| WoodMaxx FM-62 · Hammer blades →774 lb · Current 2025-and-newer manual printed p40 / PDF p41 lists 774 lb product weight without shaft/oil/packaging inclusion. Page lists 641 lb mower-only plus a 39 lb shaft; shipping is separately labeled 800 lb. Retain these distinct bases and confirm complete operating weight for the delivered hammer assembly. | Needs specification reviewResolve the conflicting published specifications for the exact model revision. |
| WoodMaxx FM-78 · Hammer blades →880 lb · Current 2025-and-newer manual printed p40 / PDF p41 lists 880 lb product weight without shaft/oil/packaging inclusion. Page lists 710 lb mower-only plus a 39 lb shaft; shipping is separately labeled 900 lb. Retain these distinct bases and confirm complete operating weight for the delivered hammer assembly. | Needs specification reviewResolve the conflicting published specifications for the exact model revision. |
| Farmer-Helper FH-EFGC125 · Hammer blades →Operating weight unconfirmed · Complete operating weight is unverified. Current page: 576 lb “Weight” and 624 lb “Crated Weight.” Linked Rev 12-12-17 manual p23: 600 lb “Weight” and 635 lb crated. Product-weight shaft/oil/assembly inclusions are unstated. Keep these separate; do not use crate weight or silently choose one product figure as an operating load. | Needs specification reviewConfirm the complete operating weight; a shipping weight cannot establish the attachment load. |
| Farmer-Helper FH-EFGC155 · Hammer blades →Operating weight unconfirmed · Complete operating weight is unverified. Current page: 741 lb “Weight” and 789 lb “Crated Weight.” Linked Rev 12-12-17 manual p23: 720 lb “Weight” and 755 lb crated. Product-weight shaft/oil/assembly inclusions are unstated. Keep these separate; do not use crate weight or silently choose one product figure as an operating load. | Needs specification reviewConfirm the complete operating weight; a shipping weight cannot establish the attachment load. |
| WoodMaxx FM-62 · Y-blades →Operating weight unconfirmed · Complete Y-configuration operating weight is unverified. Current manual p40 gives 774 lb generic product weight without shaft/oil or blade-specific inclusion. Page gives 641 lb mower-only plus 39 lb shaft and separately 800 lb shipping. These bases conflict or lack scope; none substitutes for an assembled Y operating load. | Needs specification reviewConfirm the complete operating weight; a shipping weight cannot establish the attachment load. |
| WoodMaxx FM-78 · Y-blades →Operating weight unconfirmed · Complete Y-configuration operating weight is unverified. Current manual p40 gives 880 lb generic product weight without shaft/oil or blade-specific inclusion. Page gives 710 lb mower-only plus 39 lb shaft and separately 900 lb shipping. These bases conflict or lack scope; none substitutes for an assembled Y operating load. | Needs specification reviewConfirm the complete operating weight; a shipping weight cannot establish the attachment load. |
| Land Pride FM2560 · hammer rotor →Operating weight unconfirmed · Manual p39 specifies 965 lb for the standard unit with a duckfoot rotor; the brochure lists 929 lb without a rotor/inclusion basis. The separate hammer-rotor assembly is 222 lb. No complete hammer operating mass or shipping mass is established. Do not add the rotor to an already rotor-inclusive unit weight or substitute these references for the operating load. | Needs specification reviewAsk the manufacturer whether the horsepower range means engine or PTO power. |
| Land Pride FM2572 · hammer rotor →Operating weight unconfirmed · Manual p39 specifies 1,040 lb for the standard unit with a duckfoot rotor; the brochure lists 1,040 lb without a rotor/inclusion basis. The separate hammer-rotor assembly is 261 lb. No complete hammer operating mass or shipping mass is established. Do not add the rotor to an already rotor-inclusive unit weight or substitute these references for the operating load. | Published mismatchBoth engine (39) and PTO (30.9) horsepower are below the published 42 hp minimum. |
| Land Pride FM2584 · hammer rotor →Operating weight unconfirmed · Manual p39 specifies 1,236 lb for the standard unit with a duckfoot rotor; the brochure lists 1,168 lb without a rotor/inclusion basis. The separate hammer-rotor assembly is 301 lb. No complete hammer operating mass or shipping mass is established. Do not add the rotor to an already rotor-inclusive unit weight or substitute these references for the operating load. | Published mismatchBoth engine (39) and PTO (30.9) horsepower are below the published 49 hp minimum. |
| Blue Diamond Heavy Duty 403740 →1763 lb · 1,763 lb (800 kg) in the Aug-2025 spec sheet (without PTO) and the Feb-2026 manual p49. Add the PTO shaft for the operating load. | Published mismatchBoth engine (39) and PTO (30.9) horsepower are below the published 75 hp minimum. |
| Farmry HFS87 →1299 lb · 1,299 lb (589 kg) including PTO shaft on the product page and in the HFS manual Rev 1.6, printed p17. | Needs specification reviewAsk the manufacturer whether the horsepower range means engine or PTO power. |
| Farmer-Helper FH-EF95 →330 lb · 330 lb retained, the heavier of the product page (325 lb) and the FH-EF manual p13 (330 lb); crated 360 lb. Neither says whether the included PTO shaft is counted. | Needs specification reviewConfirm the tractor’s PTO hp is inside the 45-hp limit and above the mower’s minimum on the exact transmission. |
| Farmer-Helper FH-EF105 →347 lb · 347 lb retained, the heavier of the product page (342 lb) and the FH-EF manual p13 (347 lb); crated 377 lb. Neither says whether the included PTO shaft is counted. | Needs specification reviewConfirm the tractor’s PTO hp is inside the 45-hp limit and above the mower’s minimum on the exact transmission. |
| Farmer-Helper FH-EF125 →390 lb · 390 lb retained, the heavier of the product page (390 lb) and the FH-EF manual p13 (383 lb); crated 438 lb. Neither says whether the included PTO shaft is counted. | Needs specification reviewConfirm the tractor’s PTO hp is inside the 45-hp limit and above the mower’s minimum on the exact transmission. |
With 30.9 PTO and 39 engine hp, is LFS61 still inside its range, or should I move up to FM-78?
Read the guide →FIELD GUIDETake the complete setup, not just a horsepower number, to the manufacturer.
Read the guide →FOLLOW THE NUMBERS
Research record reviewed November 8, 2026. Confirm the current manual and the exact revision supplied with your machine.