WoodMaxx FM-78H vs FH-EFGC155: wider reach or a narrower hammer mower
A wider tractor changes this decision. FM-78H provides a 70-inch cut and documented Category 1/2 mounting, subject to the required Category 2 bushings; FH-EFGC155 cuts 60 inches and specifies Category 1. The WoodMaxx also needs a tractor hydraulic circuit for its installed side shift. Measure the route and decide how the mower must sit behind the tractor before choosing the larger package.
By Acreage Equipment · Reviewed November 8, 2026 · Specification research, not a field test
Consider FM-78H for a wider track and a planned hydraulic connectionShortlist FM-78H when the 70-inch swath or documented Category 2 mounting solves a real requirement, and varying lateral position is useful.
Consider FH-EFGC155 where access favors the 60-inch packageShortlist the base EFGC155 when its 67-inch stated body, 60-inch cut and Category 1 mounting suit the route and tractor.
Prices shown on the product cards retain their original check dates. Prices were not refreshed for this comparison, and no purchase-cost ranking is made. Request current itemized quotes for the exact configuration, shaft, setup and delivery. Open your saved comparison →
The differences that matter.
01
Seventy inches of cut also needs more access space
FM-78H cuts 70 inches and its page lists 80 inches overall width. FH-EFGC155 cuts 60 inches with a 67-inch overall width. WoodMaxx’s manual has a differently labeled 78 × 35 × 35-inch product-dimension row, so the outer envelope still needs confirmation.
For a wider tractor track or broader mowing lane, FM-78H supplies a real swath increase to investigate. For narrow gates, turns or orchard rows, EFGC155’s smaller stated body may be the useful constraint. Neither cut width alone proves tire coverage at every offset.
The current FM-series manual permits FM-78H on Category 1 or 2, with a Category 2 bushing set required. FH-EFGC155 specifies Category 1. WoodMaxx’s lower page text still says Category 1 only, despite broader Category 1/2 text elsewhere.
An owner with Category 2 linkage has a documented reason to investigate the FM-78H package, but should have the dealer resolve the conflicting page text and supply the correct bushings. Do not assume ordinary Category 2 mounting establishes Category 2 quick-hitch compatibility.
Hydraulic placement needs a complete tractor-side plan
FM-78H includes hydraulic side shift and requires rear remotes. Its manual gives shifted-left extents of 36 inches left and 43 right from center, and shifted-right extents of 22.5 left and 57 right. FH-EFGC155’s base manual lists two mounting positions, at 35.25 or 39.5 inches right of center; its optional hydraulic kit is excluded here.
Choose FM-78H when changing lateral placement is needed during work and a suitable rear circuit can be provided. Confirm flow, pressure, valve type and couplers, which the reviewed WoodMaxx specifications do not settle. Neither set of extents is a verified cutting-edge distance beyond the tractor tire.
The smaller mower starts lower, but its documents disagree
FM-78H’s manual specifies 30–65 PTO hp for both offered blade styles; this comparison retains the hammer configuration. FH-EFGC155’s current page specifies 25–65 PTO hp, while its manual uses PTO power for gear tractors and engine power for hydrostatic tractors at the 25-hp minimum and separately states an 80-PTO-hp maximum.
Between 25 and 30 PTO hp, EFGC155’s current page offers a reason to ask further questions; it does not resolve the manual conflict. At higher power, the equal page ceilings do not make the widths, hydraulic requirements or rear loads interchangeable.
FM-78H has 22 individual hammers and a 3/4 to 3-3/4-inch height range; WoodMaxx says the hammer and Y configurations are not interchangeable. FH-EFGC155 lists 24 hammers and a 0–6-inch height range, and its page offers grass-blade substitution.
If future work may shift between brush and grass or require taller stubble, ask what parts and setup that change entails on EFGC155. Order FM-78H with the intended rotor from the start. More hammers on the narrower mower do not establish a better finish or greater productivity.
The larger package has unresolved operating-load figures
FM-78H’s manual lists 968 lb product weight, while its page gives 804 lb mower-only plus a 39 lb shaft and 1,000 lb shipping. FH-EFGC155’s page gives 741 lb product and 789 lb crated, versus 720 lb and 755 lb in its manual. Complete hammer-specific operating masses remain unverified.
The wider hydraulic machine warrants a full lift, ballast and axle-load review with the actual assembly. Do not choose a favorable figure from either source conflict or use a crate weight as the rear operating load.
Consider FM-78H for a wider track and a planned hydraulic connection
Shortlist FM-78H when the 70-inch swath or documented Category 2 mounting solves a real requirement, and varying lateral position is useful. Confirm the full hydraulic connection, bushings, 30–65 PTO-hp band and complete hammer assembly before accepting a quote.
Consider FH-EFGC155 where access favors the 60-inch package
Shortlist the base EFGC155 when its 67-inch stated body, 60-inch cut and Category 1 mounting suit the route and tractor. Decide whether its fixed mounting positions are sufficient, resolve the power and load conflicts, and specify any grass-blade or hydraulic changes separately.
FM-78H’s Category 1/2 current manual requires a Category 2 bushing set, while lower page text says Category 1 only. Its claimed 18-inch total offset is not reconciled with the published endpoint extents. The hose-end thread and supplied couplers do not establish hydraulic flow, pressure or valve requirements.
FH-EFGC155’s current 25–65 PTO-hp page, manual transmission footnote and 80-PTO-hp paragraph do not establish a single consistent band. Additional Information also mixes a 65-hp gearbox with a generic 50-hp tractor statement. FM-78H’s 30–65 PTO range applies to both listed blade styles but does not make the rotors interchangeable.
FM-78H product, mower-only and freight labels differ, and its manual/page outer dimensions are not aligned. EFGC155 page/manual product and crate weights also differ. No complete installed hammer load is verified for either machine.
EFGC155’s main specifications/manual describe three belts and a Series 5 shear-bolt shaft, while Additional Information says two belts and Series 4. Its base record excludes the optional hydraulic kit. WoodMaxx includes a slip-clutch shaft; its open-rear-gate discharge wording conflicts with the manual instruction to secure the gate and guards for operation.
Official product pages and current manual links were reviewed on November 8, 2026. WoodMaxx references use FM-series Rev C, September 22, 2026. Betstco’s currently linked FH-EFGC manual is marked Revision 12-12-17, despite its 2025 upload path.
FOLLOW THE NUMBERS
Sources & documentation
Research record reviewed November 8, 2026. Confirm the current manual and the exact revision supplied with your machine.
