John Deere 5105M · FLAIL MOWERS
Blue Diamond rates its 87-inch 403740 at 75–100 hp without a basis; the John Deere 5105M is inside on its 90 PTO hp but 5 over on its 105 engine hp. Every other flail mower here stops at 80 hp or less.
By Acreage Equipment · Reviewed November 14, 2026 · Specification research, not a field test
PUT THIS GUIDE TO WORK
See published mismatches and the checks still needed.
BEST MATCHES FOR THE 5105M
1 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 mowerBlue Diamond
87″ cutting width · 75–100 HP recommended (basis not stated) · spec sheet and manual
Confirm the actual hitch category, required bushings and complete mounting arrangement; multiple listed categories do not establish quick-hitch compatibility.
THE DECISION IN NUMBERS
Tractor reference: John Deere 5105M, November 2025 brochure and November 2024 price pages; Category 2 convertible to 1; 5,150 lb at 24 in. (EH hitch). Only Blue Diamond’s 403740 is not excluded, on PTO power.
Scroll the table sideways on smaller screens.
| Mower | Published requirement | On 90 PTO / 105 engine hp | Result |
|---|---|---|---|
| Blue Diamond 403740 (87-inch) | 75–100 hp, basis unspecified; Category I and II | Inside on 90 PTO; 5 over on 105 engine | Ask Blue Diamond |
| Land Pride FM2560 / FM2572 / FM2584 | 33 / 42 / 49–80 hp, basis unspecified | 10 over on PTO; 25 over on engine | Excluded |
| WoodMaxx FM-78 / FM-78H / FM-78 Y | 30–65 PTO hp | 25 over | Excluded |
| Farmer-Helper FH-EFGC155 / 125 | To 65 PTO hp (page) | 25 over | Excluded |
| All other mowers here | To 60 hp or less | Over | Excluded |
Land Pride FM2584 runs to 80 hp and WoodMaxx FM-78 to 65 PTO hp; the 5105M is over both on either reading. The comparison below shows how they differ on smaller tractors such as the 5075M, which fits both.
A flail mower’s published maximum is its maker’s limit for the gearbox and driveline. This site does not screen past it. Of the flail mowers here, only Blue Diamond’s 403740 lists a range that reaches 90 PTO hp, and the 5105M’s engine is 5 over its 100.
Ask Blue Diamond whether its 75–100 hp means engine or PTO power. The 403740 weighs 1,763 lb before the shaft, well under the 5105M’s 5,150-lb lift at 24 inches, and needs a double-acting rear remote for its side shift.
Deere’s November 2025 brochure lists 5,150 lb 24 inches behind the lift point (5,950 lb optional), measured with the electrohydraulic hitch. Every attachment here weighs a fraction of that; ask which hitch control is fitted, since Deere gives no figure for the mechanical one.
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 | U.S. 5105M · 16F/16R PowrReverser · open station or cab · 540/540E PTO90 PTO hp |
|---|---|
| Farmry LFS45 →355 lb · Net weight WITH PTO shaft, current LFS manual Rev 1.7 p18 | Published mismatchBoth engine (105) and PTO (90) horsepower exceed the published 35 hp maximum. |
| Farmry LFS53 →395 lb · Net weight WITH PTO shaft, current LFS manual Rev 1.7 p18 | Published mismatchBoth engine (105) and PTO (90) horsepower exceed the published 35 hp maximum. |
| Farmry LFS61 →421 lb · Net weight WITH PTO shaft, current LFS manual Rev 1.7 p18 | Published mismatchBoth engine (105) and PTO (90) horsepower exceed the published 35 hp maximum. |
| TMG Industrial TMG-TFM60 →650 lb · Product-page operation weight; manual gives conflicting 270 kg (about 595 lb) | Published mismatchBoth engine (105) and PTO (90) horsepower exceed the published 60 hp maximum. |
| 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. | Published mismatchBoth engine (105) and PTO (90) horsepower exceed the published 45 hp maximum. |
| 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. | Published mismatchBoth engine (105) and PTO (90) horsepower exceed the published 60 hp maximum. |
| 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 mismatch90 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. | Published mismatch90 PTO hp exceeds the published 45 hp range. |
| 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. | Published mismatch90 PTO hp exceeds the published 65 hp range. |
| 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. | Published mismatch90 PTO hp exceeds the published 45 hp range. |
| 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. | Published mismatch90 PTO hp exceeds the published 65 hp range. |
| 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. | Published mismatch90 PTO hp exceeds the published 65 hp range. |
| 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. | Published mismatch90 PTO hp exceeds the published 65 hp range. |
| 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. | Published mismatch90 PTO hp exceeds the published 45 hp range. |
| 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. | Published mismatch90 PTO hp exceeds the published 65 hp range. |
| 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. | Published mismatchBoth engine (105) and PTO (90) horsepower exceed the published 80 hp maximum. |
| 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 (105) and PTO (90) horsepower exceed the published 80 hp maximum. |
| 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 (105) and PTO (90) horsepower exceed the published 80 hp maximum. |
| 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. | Needs specification reviewConfirm the actual hitch category, required bushings and complete mounting arrangement; multiple listed categories do not establish quick-hitch compatibility. |
| 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. | Published mismatchBoth engine (105) and PTO (90) horsepower exceed the published 85 hp maximum. |
| 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. | Published mismatch90 PTO hp exceeds the published 45 hp range. |
| 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. | Published mismatch90 PTO hp exceeds the published 45 hp range. |
| 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. | Published mismatch90 PTO hp exceeds the published 45 hp range. |
On a Category 2 tractor with about 52 engine and 42–44 PTO hp, is the 84-inch FM2584 inside its range, or is FM-78 the safer choice?
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 14, 2026. Confirm the current manual and the exact revision supplied with your machine.