CompareUpdated August 14, 2026
Woodmaxx FM-78 vs FM-78H: is the H package worth it?
Same 70″ cut, same 30-65 PTO HP range, same hammer or Y-blade choice, same 2-year parts warranty. The decision is whether hydraulic offset earns about $720 and roughly 94 lb more machine weight on your property.
By Tom Brennan · Editor
$3,900 · 70″ · fixed offset
$4,620 · 70″ · hydraulic side shift
Buyer fit
Who should buy the FM-78 vs FM-78H
Both decks are Category 1 utility flails for 30-65 PTO HP tractors. Match the H package to perimeter work and remote availability, not to vague brochure claims about capability.
Buy the FM-78 if…
- + Most of your acres are open pasture or field where a 70″ path matters more than moving the deck sideways.
- + Your tractor has no rear remote, or you want to avoid plumbing another circuit for offset.
- + You want the lower list price ($3,900) and the lighter 710 lb machine weight on the three-point.
Buy the FM-78H if…
- + Fence lines, orchard rows, and pond edges on level ground are a regular share of the mowing. H does not tilt — banks are VAM65 vs FM-78H.
- + You already have at least 1 rear hydraulic remote and lift capacity for about 804 lb of machine weight.
- + Repositioning a 70″ deck on every edge pass costs more time than the ~$720 H premium.
Spec sheet
Woodmaxx FM-78 vs FM-78H specs
Cutting width, HP band, warranty, and blade options match. The measurable gaps are list price (about $720), machine weight (94 lb), shipping weight (100 lb), and hydraulic side shift with a remote requirement. Specs verified 2026-08-05.
Swipe sideways to see all columns
| Spec | FM-78 | FM-78H | Edge |
|---|---|---|---|
| Cutting width | 70″ | 70″ | Tie |
| PTO HP range | 30-65 | 30-65 | Tie |
| Hitch | Category 1 | Category 1 | Tie |
| Machine weight | 710 lb | 804 lb | FM-78 |
| Shipping weight | 900 lb | 1000 lb | FM-78 |
| List price | $3,900 | $4,620 | FM-78 |
| Price per inch of cut | $56 | $66 | FM-78 |
| Warranty | 2 years | 2 years | Tie |
| Side shift | Fixed offset | Hydraulic (no tilt) | FM-78H |
| Rear remotes required | 0 | 1 | Tie |
| Blade options | hammer, y-blade | hammer, y-blade | Tie |
Differentiator
What the FM-78H package actually adds
The cutting system is shared. Both list a 5″ rotor at about 2,160 RPM, 95 mph tip speed, 22 hammers at about 1.85 lb each (~40.7 lb total hammer mass) or 44 Y-blades, and 3× BX39 (Gates Truflex) drive. The H suffix is offset geometry, hydraulics, and lift weight, not a different rotor.
Offset geometry
FM-78: Fixed offset from PTO center: extends 46″ right / 33″ left. Not hydraulic.
FM-78H: Hydraulic side shift: shifted left 36″L/43″R; shifted right 22.5″L/57″R. Requires rear hydraulic remotes.
Remotes and lift
The FM-78 lists 0 rear remotes required. The FM-78H lists 1. That single circuit is the gate: without it, the H package cannot do what you paid for.
Lift capacity matters more on the H. Machine weight moves from 710 lb to 804 lb (+94 lb). Shipping weight moves from 900 lb to 1000 lb (+100 lb). Confirm three-point capacity and front ballast before ordering either 70″ deck, especially the heavier H.
Cost
Is the FM-78H’s ~$720 premium worth it?
List prices are $3,900 for the FM-78 and $4,620 for the FM-78H, about $720 apart. Per inch of cut that is about $56/inch versus $66/inch. The premium buys hydraulic travel and the ability to keep the tractor off fences and soft banks. It does not buy more cut width, more warranty years, or a different blade set.
Swipe sideways to see all columns
| Spec | FM-78 | FM-78H | Edge |
|---|---|---|---|
| List price | $3,900 | $4,620 | FM-78 |
| Price / inch of cut | $56 | $66 | FM-78 |
| Machine weight | 710 lb | 804 lb | FM-78 |
| Rear remotes required | 0 | 1 | FM-78 |
| Warranty | 2 years | 2 years | Tie |
The H pays for itself when edge passes dominate your hours: every time you would otherwise back up, re-angle, or leave a strip against a fence, hydraulic shift is the product. On open hayfield and pasture circuits, the FM-78 is the cleaner buy.
Woodmaxx FM-78 strengths and tradeoffs
30–65 PTO HP tractors clearing open pastures and fields where width beats offset.
Pros
- Big step up in acres-per-hour vs 55″ machines
- Hammer or Y-blade configuration
- Factory-direct pricing vs dealer-mark brands
Cons
- Needs real utility horsepower and lift capacity
- No side shift for tight orchard rows
Woodmaxx FM-78H strengths and tradeoffs
Utility-tractor owners who want wide coverage and offset control in one deck.
Pros
- Width plus hydraulic offset in one implement
- Built for heavier grass and brush workloads
- 2-year parts warranty
Cons
- Premium over FM-78 for the H package
- Requires rear remotes and adequate ballast
Does hydraulic side shift cause the FM-78H problems GTT owners reported?
Some of them, yes. Green Tractor Talk’s May 2023 78H owner had a first-use failure from factory belts set too tight. The October 2023 post is worse for the H specifically: rusty slide rod on arrival, hydraulic slide rebuilt within a year, metal-to-metal tensioner pivot seized and ate belts. Woodmaxx resolved the hardware. That owner still wished they had bought a brush hog.
Those reports are not a reason to skip the H if fence lines are the job, and they are not a reason to buy the H for open pasture. The premium is about $720 and one rear remote. Hitch copy also splits: intro language says Category 1 and 2; the detailed footer says Category 1 only. This catalog lists both SKUs as Cat 1. Confirm pins and lift for 804 lb before you treat the H as Cat 2.
Owner signal
What owners report about FM-78 vs FM-78H
Woodmaxx FM-78
Themes paraphrased from Woodmaxx-published owner reviews and adjacent FM-78 ownership comments (retrieved 2026-08-07). Not a scientific sample.
- Cleaner finish than a rotary cutter. Owners commonly say the FM-78 leaves a cleaner, more even result than older brush hogs on field edges and grass.
- Chest-high grass and weeds. Hammer setups get praise for waist- to chest-high grass and mixed field growth when paced carefully.
- Wide-path efficiency. The 70″ cut is valued for fewer passes on open ground versus 55″ machines.
- Build perception. Buyers repeatedly call the deck beefy and well built relative to cheaper import alternatives they cross-shopped.
- No hydraulic reach. Fixed-offset simplicity is fine for open work, but fence and orchard buyers often reconsider the FM-78H.
Woodmaxx FM-78H
Themes paraphrased from Green Tractor Talk (May–Oct 2023), TractorByNet (2019), and Woodmaxx product-page reviews (retrieved 2026-08-14). Not a scientific sample.
- Factory belt tension on first use. A GTT owner of the 78H reported a first-use failure from belts set too tight at the factory. Woodmaxx sent parts after some back-and-forth; the owner had already bought bearings and belts. They still said they would buy it again.
- Hydraulic slide and rust on arrival. Another GTT owner (Oct 2023) said the slide rod arrived rusty, the hydraulic slide fell apart within a year, and the metal-to-metal tensioner pivot seized and ate belts. Woodmaxx resolved the issues promptly. That owner still wished they had bought a brush hog instead.
- L3901 and L4802 pairings. Woodmaxx-page reviews describe the 70″ H as workable on Kubota L3901 and L4802 when lift and one remote are sorted. One L3901 owner said it used less HP than a 5-foot rotary and would not go larger.
- Locust and pasture cleanup. A June 2026 Woodmaxx-page review from a 60-acre horse and cattle place said bristly locust stayed down 1 to 2 years after flail passes, versus growing back by the next cut with a rotary.
- Skids, grass piles, and winter ballast. GTT notes include lifting the deck on turns so skids do not rip turf, and dumping built-up grass. On TractorByNet (2019), one owner left the FM-78H on the tractor all winter as FEL counterweight.
Final call
FM-78 vs FM-78H: which should you buy?
Choose the FM-78 when open pastures and fields are the job. You keep the same 70″ cut, the same 30-65 HP band, and the same 2-year warranty for $3,900, with 0 remotes required and 710 lb of machine weight on the hitch.
Choose the FM-78H when perimeter work is frequent enough that hydraulic travel beats tractor choreography. You pay $4,620, carry 804 lb, and need 1 rear remote. Side shift geometry is the product: Hydraulic side shift: shifted left 36″L/43″R; shifted right 22.5″L/57″R. Requires rear hydraulic remotes.
Woodmaxx FM-78 vs FM-78H FAQ
How much does hydraulic side shift add on the Woodmaxx FM-78H?+
About $720 at list price ($4,620 vs $3,900). Machine weight rises by about 94 lb (804 lb vs 710 lb), and shipping weight rises by about 100 lb (1000 lb vs 900 lb). The FM-78H also requires 1 rear hydraulic remote.
Is the FM-78H worth it for open pastures?+
Usually not. Both models share a 70″ cut and 30-65 PTO HP range. On open fields the fixed-offset FM-78 saves about $720 and skips the rear-remote requirement. Pay for the H when fence lines, orchard rows, or pond edges are a regular part of the job.
What is the side shift geometry on FM-78 vs FM-78H?+
The FM-78 is fixed: Fixed offset from PTO center: extends 46″ right / 33″ left. Not hydraulic. The FM-78H is hydraulic: Hydraulic side shift: shifted left 36″L/43″R; shifted right 22.5″L/57″R. Requires rear hydraulic remotes.
Do FM-78 and FM-78H use the same blades and rotor?+
Yes. Both offer hammer or Y-blade options (22 hammers at about 1.85 lb each, or 44 Y-blades). Both list a 5″ rotor at about 2,160 RPM and 95 mph tip speed. The H suffix adds hydraulic offset, not a different cutting system.
What tractor HP and hitch do FM-78 and FM-78H need?+
Both list 30-65 PTO HP and Category 1. Confirm three-point lift for the FM-78’s 710 lb machine weight (or 804 lb on the H) plus front ballast. The FM-78H needs 1 rear remote; the FM-78 lists 0.
Woodmaxx FM-78 vs FM-78H: which should I buy?+
Buy the FM-78 for open pasture and field work when you want the same 70″ cut without paying for hydraulics. Buy the FM-78H when offset reach matters and you already have a rear remote, accepting about $720 more and roughly 94 lb more machine weight.