WoodMaxx FM-78 Y vs hammer: same power band, different blade order
FM-78 Y and hammer options share a 70-inch cut, 30–65 PTO hp range and $3,900 observed price. The choice therefore rests on the manufacturer’s vegetation guidance and the different blade assemblies and service procedure. A Y order does not create a lower-power 70-inch option.
By Acreage Equipment · Reviewed November 7, 2026 · Specification research, not a field test
WoodMaxx FM-78 · Y-blades: when to shortlist itConsider the 70-inch Y option for grass-focused work when 30–65 PTO hp is documented and the complete Y assembly, load and replacement-kit contents are confirmed.
WoodMaxx FM-78 · Hammer blades: when to shortlist itConsider the 70-inch hammer option when the maker’s small-sapling guidance matches the intended material and the 30–65 PTO band is met.
Exact official black/blade option observations on November 7, 2026. Base prices exclude uncalculated options, delivery, taxes and setup. Equal price does not establish equal lifetime cost. Open your saved comparison →
A tractor at 29.9 PTO hp is below the minimum for both; 30 meets both numeric minimums but still needs the remaining checks. Unlike FM-62, selecting Y-blades does not open a lower-power band on FM-78.
FM-78 Y: page directs Y-blades toward grasses. FM-78 hammer: page directs hammers toward saplings 1 inch or less.
Use this as manufacturer selection guidance, then ask about actual material and conditions. It does not prove a finish, efficiency or brush-capacity result.
Replacement quantities and assembly differ. The larger count of Y pieces is not evidence of more productive cutting; confirm center components and hardware in each kit.
FM-78 Y: manual describes reversible blades with its specified assembly order. FM-78 hammer: manual prescribes hammer orientation.
The maintenance procedures differ. Follow the delivered manual and matched-set requirements; no longer-life or lower-service-cost estimate is established.
FM-78 Y: black SKU FM-78-0007; $3,900 USD. FM-78 hammer: black SKU FM-78-0006; $3,900 USD.
These are separate offered configurations at equal observed base prices. The page forbids interchanging Y and hammer setups, so do not order one expecting a later blade-only conversion.
Consider the 70-inch Y option for grass-focused work when 30–65 PTO hp is documented and the complete Y assembly, load and replacement-kit contents are confirmed. It offers no observed price or published minimum-power saving over hammers.
WoodMaxx FM-78 · Hammer blades: when to shortlist it
Consider the 70-inch hammer option when the maker’s small-sapling guidance matches the intended material and the 30–65 PTO band is met. At the same observed price, confirm the specific vegetation and delivered assembly rather than buying by blade count.
Generic weight and dimensions are not blade-specific and conflict between current page/manual.
Parts tables reuse rotor labels while the page explicitly disallows Y/hammer interchangeability; do not infer a conversion.
Page spare-kit bolt length and manual parts length differ.
Exact official product configurations, current options and manufacturer-linked manuals were checked November 7, 2026. Source labels and unresolved revision differences are retained. These comparisons interpret published evidence and do not represent field tests or confirmed tractor pairings.
FOLLOW THE NUMBERS
Sources & documentation
Research record reviewed November 7, 2026. Confirm the current manual and the exact revision supplied with your machine.
