OS901 Series Hydrostatic SP Overseeder
OS901 Series Hydrostatic SP Overseeder
  • OS901 Series Hydrostatic SP Overseeder
  • OS901 Ser. New Blade Design
  • OS901 Ser. Foot Pedal
  • OS901 No Thread, No Bolt Foldable Handles
  • Self-Propelled Hydrostatic Drive
  • Auto Drop System
  • Elevated Seed Box
  • OS901 Infinite Heavy-Duty Depth Adjustment
  • Dual Belts
  • Floating Cutting Head
OS901 Series Hydrostatic SP Overseeder

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Renovation Equipment Line-Up

OS901 Series Hydrostatic SP Overseeder

Self-propelled Overseeder

Model #:

  • OS901SPS (Subaru) / OS901SPH (Honda)


  • Self-propelled hydrostatic drive
  • New low-thatch long life blade
  • New foot pedal actuation increases comfort, extends blade life
  • Auto Drop™ system conserves seed
  • Elevated seed box
  • Infinite depth adjustment
  • Intuitive, best in class controls - easy for everyone
See more features


  • Engine: Subaru EX270 (0S901SPS); Honda GX270  (0S901SPH)
  • Depth Adjustment: .125” with up to .5” adj. for blade wear
  • Reel: 11 Fixed Blades - 22" wide
  • Productivity: @3.0MPH 29,040 ft2/hour 0.67 acre/hr
  • Seed box: 30 lbs
See more specs
Contact your local dealer for more information

Billy Goat’s self-propelled overseeder reduces fatigue associated with pushing and features intuitive forward and reverse operator controls. New to the unit is a blade design that reduces thatch and improves blade life due to its sharpened leading edge and attack angle combined with a new foot actuated height adjust that raises and lowers the reel effortlessly, providing more blade depth. The unit is 22” wide with an exclusive 11-blade slicing reel that floats along contours of yards increasing seed to soil contact and improving germination rates. The unit comes standard with a 30 lb. seed box that is generously elevated above the turf to eliminate any clogging that may occur from moisture. (Pictured with optional seed box cover.) Billy Goat’s exclusive Auto Drop™ system automatically starts and stops seed drop with bale engagement and disengagement conserving seed and preventing end-of-run seed piling. Infinite depth adjustment of the slicer blades promotes longer blade life vs. presets and seed settings are found on board for operator convenience. When it’s time to rejuvenate your yard, Clean Up with Billy Goat!

  • OS901 Ser. New Blade Design
    OS901 Ser. New Blade Design

    New blade design improves slicing, reduces thatch pick-up and extends blade life.

  • OS901 Ser. Foot Pedal
    OS901 Ser. Foot Pedal

    New foot actuated height adjust raises and lowers the reel effortlessly and provides more blade depth. Conversion kit available for prior model, part no. 351611.

  • OS901 No Thread, No Bolt Foldable Handles
    OS901 No Thread, No Bolt Foldable Handles

    Great for storage, transport and long life.

  • Self-Propelled Hydrostatic Drive
    Self-Propelled Hydrostatic Drive

    With intuitive forward & reverse drive controls eliminate pushing to reduce fatigue. Simple auto release switch for transport in off position.

  • Auto Drop System
    Auto Drop System

    Automatically starts and stops seed drop with reel engagement and disengagement, conserving valuable seed.

  • Elevated Seed Box
    Elevated Seed Box

    Prevents moisture from clogging the seed drop and provides excellent visibility. Axle driven seed agitator eliminates belts and tire-on-tire systems.

  • OS901 Infinite Heavy-Duty Depth Adjustment
    OS901 Infinite Heavy-Duty Depth Adjustment

    Save on blade wear when compared to preset adjustments that may promote premature flail wear.

  • Dual Belts
    Dual Belts

    Increases life and efficiency.

  • Floating Cutting Head
    Floating Cutting Head

    With an exclusively designed 22” slicing reel floats with contours of yards, increasing seed to soil contact and improving germination rates.

  • OS901 Warranty
    OS901 Warranty

    3-year Honda and 5-year Subaru engine; 1-year machine

Engine: Subaru EX270 (0S901SPS); Honda GX270 (0S901SPH)
Verti-cutting Depth (variable): .125” with up to .5” adj. for blade wear
Reel: 11 Fixed Blades - 22" wide
Productivity: @3.0MPH 29,040 ft2/hour 0.67 acre/hr 
Weight: 314 lbs (0S901SPS); 323 lbs (0S901SPH)
Length: 58.38"
Width: 30.75"
  • Clear Seed Box Cover
    Clear Seed Box Cover

    Part #: 351617

    Convenient visibility to seed level at all times.

  • Chariot

    Part #: 351601

    Reduces operator fatigue

    Installation Instructions

  • Foot Pedal Retro Kit
    Foot Pedal Retro Kit

    Part #: 351611

    Simple retro kit for OS900 series

    Installation Instructions

  • What type of lawn preparation is necessary prior to overseeding?

    First, mow your lawn at the lowest setting on your mower. For best results, power rake to remove thatch from the lawn. If you plan on fertilizing your lawn, do so with a broadcast or drop spreader prior to overseeding. It is important not to water prior to seeding.

  • How can I get the best results from overseeding?

    Always overseed in two passes at ½ the application rate for your selected seed at right angles or in a crisscross pattern. (Drop rate settings are under the seed box lid. A Scotts cross-reference is provided for your benefit.) Water heavily immediately, then lightly for 10 –14 days, keeping soil moist. After germination, water less often to promote root growth.

  • When is the best time to overseed?

    It is best to overseed in the autumn when weed seed has difficulty germinating. Warm days and cool nights with frequent watering will produce the best results. Generally speaking, you want to overseed when no less than three weeks to the date of first freeze occurs.

  • I’m confused, should I power rake or aerate?

    Power raking and aerating are not substitutes for each other though lawns do experience some common benefits. Power raking removes excess organic debris from the lawn. Aerating is meant to reduce soil compaction and improve grass root development.

  • What is thatch?

    Thatch is a layer of semi-decomposed grass and other organic material that accumulates above the soil faster than it can be absorbed. Thatch build-up is a normal occurrence and is not necessarily harmful to the lawn until it gets too thick. Poor mulching mower performance can be a big contributor to thatch build-up.

  • Why should I worry about thatch?

    Thatch forms a barrier between soil and the water, nutrients, and air required for a healthy lawn. It may also serve as a perfect breeding ground for damaging lawn diseases.

  • How do I get the best results from the power rake?


    Soil should be moist, but not too wet. If the soil is too wet the grass could pull away. Best results are achieved when working in two directions. Adjust the depth of the flails under the machine so that they make contact with and remove thatch. The flails should not make contact with the soil. Rake up thatch immediately or use the Billy Goat KV or MV vacuum to make quick work of cleanup.


  • How can I tell if I need to power rake?

    If thatch is more than ½ thick, you should consider power raking. Take a core sample of grass and soil from your lawn. Measure the organic material sitting on the surface of the soil. It should not exceed ½”. Check several areas of your lawn, as build-up can be irregular.

  • When should I power rake?

    For cool season grasses, power raking is recommended in early fall or spring. Warm season grasses are better power raked in late spring to early summer. Because power raking does damage some healthy grass, it is important to power rake with enough growing season left for your lawn to recover. At least 30 days of growing season should be available following power raking for successful results.

Product Feedback

  • I love your products! After four weeks and a complete renovation using Billy Goat's OS901 series Overseeder, a lush envious lawn emerged, along with a very pleased customer!
    » Read More

    Justin S., Quality Control, Stephen Hillenmeyer Landscape Services; Lexington, KY