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Commercial Turf Series V-Twin, 25.0 GHP Vertical Engine

Item specifics

New: A brand-new, unused, unopened, undamaged item in its original packaging (where packaging is applicable). Packaging should be the same as what is found in a retail store, unless the item is handmade or was packaged by the manufacturer in non-retail packaging, such as an unprinted box or plastic bag. See the seller's listing for full details. See all condition definitions- opens in a new window or tab ... Read moreabout the condition
Engine Series: B&S Commercial Series
Bore: 3.12 Inches Cylinders: 2
Stroke: 2.89 Inches Engine Type: 4-Cycle OHV
Compression Ratio: 8.5 Horsepower: 25 HP
Starting System: 12-Volt Key Start Model:


Crankshaft Direction: Vertical Country/Region of Manufacture: United States


Cooling System: Air
Ignition System: Electronic Spark Oil Capacity: 64 oz
Lubrication: Pressurized Carburetor: Float
Oil Filter: Yes Dry Weight: 84 Lbs
Fuel Type: Gas CC: 724 CCs

Briggs & Stratton

Cylinder Bore Type: Cast Iron


odel# 44T977-0009-G1 - 1" x 3-5/32" Crankshaft 7/16-20 Keyway Replaces Engine Model # 44T877-0001-G1

  • For Zero Turn Mowers and Tractors

Briggs & Stratton Commercial Turf 24HP* Twin Cylinder Air-Cooled 4-Cycle Gas Engine

  • Commercial-power engine rated in accordance with SAE J1995

90 V-Twin Overhead Valve (OHV) Technology

  • Balanced, lower-vibration enigeering for smoother power output
  • Increased fuel economy while running cooler and reduced emmisions

Full-Pressure Lubrication w/ Spin-On Oil Filter

  • Keeps the oil cleaner from debris that can damage internal engine parts

Dura-Bore Cast Iron Cylinder Sleeve

  • Assures long engine life and improved oil control

Float-Style Carburetor & Integral Fuel Pump

  • Dependable design for easy connection your existing fuel tank

5-Step Debris Management System

  • High-volume cooling fan helps the engine breath freely

Integrated Cyclonic Air Cleaner

  • Provides superior engine protection in high debris applications

Chrome-Plated Exhaust Valves & Super-Finished Crank Pin Bearing

  • Reduces wear to maximize engine life

Magnetron Electronic Ignition

  • Maintenance-free design, plus larger ignition coil for easy dependable starting

Also Includes:

  • 12V Gear-Drive Electric Starter & 16A Regulated Charger System

No Muffler Included

2-Year Consumer Warranty

Engine Specifications

SKU 44T977-0009-G1

Technical Specifications

Model Series 44T9
Displacement 724
Oil Capacity 64 oz (1.9 l)
Valve Configuration OHV
Flywheel Torque 130 lb/ft (176.0 Nm)
Governor Arm Torque 100 lb/in (11.5 Nm)
Carb Mount 100 lb/in (11.5 Nm)
Plug Gap 0.03 in (0.75 mm)
Intake Valve .004-.006 in (.10-.15 mm)
Exhaust Valve .004-.006 in (.10-.15 mm)
Idle Speed 1750
Air Gap .008-.012 in (.20-.30 mm)
Flywheel Puller Part 19203
Flywheel Holder Part 19433
Connecting Rod Torque 130 lb/in (15.0 Nm)
Sump Torque 325 lb/in (37.0 Nm)
Head Torque 300 lb/in (34.0 Nm)

Alternator Specifications

Alternator 592830
Type 10/13/16 amp reg
Testing RPM 3600
AC Volts 20vac, 25vac, 30vac
DC Amps 2-10adc, 2-13adc,2-16adc


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