Briggs & Stratton 44T977‑0009‑G1- a 25 HP (724 cc) vertical OHV V‑twin commercial turf engine with a 1.00 in. × 3‑5/32 in. crankshaft, cyclonic air cleaner, full‑pressure lubrication, Magnetron® Electronic Ignition for maintenance‑free, easy starting, and remote throttle control.
Briggs & Stratton Vertical OHV V-Twin Engine, 25HP, 724cc, 1in. x 3 5/32in. Shaft, Model# 44T977-0009-G1

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Shipping:
Factory shippedHeavy/large item. Lift gate service available.
Store Pickup:
Not available - online only
- Model# 44T977-0009-G1; Genuine 724cc Briggs & Stratton 2-cylinder engine with 25 HP rating and 1in. dia. x 3 5/32in. L vertical shaft
- OHV technology optimized performance that delivers longer engine life and improved fuel economy
- Magnetron® Electronic Ignition System ensures maintenance-free, easy starting
- Dura-Bore™ cast iron cylinder sleeve adds integrity and durability that withstands wear and abuse while providing improved oil control
- Designed for use with riding lawn mowers
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Description
Key Specs
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Product Summary
What's Included
- (1) Engine
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Features + Benefits
- Model# 44T977-0009-G1; Genuine 724cc Briggs & Stratton 2-cylinder engine with 25 HP rating and 1in. dia. x 3 5/32in. L vertical shaft
- OHV technology optimized performance that delivers longer engine life and improved fuel economy
- Magnetron® Electronic Ignition System ensures maintenance-free, easy starting
- Dura-Bore™ cast iron cylinder sleeve adds integrity and durability that withstands wear and abuse while providing improved oil control
- Designed for use with riding lawn mowers
- Integrated cyclonic air cleaner provides advanced protection against airborne debris entering the engine
- Mechanical Governor controls the engine speed to deliver more usable power under heavy usage
- Full pressure lubrication with oil filter Is similar to an automotive engine that continuously delivers oil under pressure to critical engine components for maximum lubrication and long engine life
- Optional Electronic Fuel Management System provides significantly improved starting for ride-on mowers
- Float feed carburetor optimized fuel delivery for improved startability and superior performance
- Higher torque provides more power resulting in improved equipment productivity
- High oil fill tube allows for easier maintenance
- Twin cylinder V-Twin engine design provides better balance and allows for increased power
- Buyer protection package provides 2-year limited consumer and commercial warranty
- Not for sale in CA
Key Specs
| Attribute | Specification |
|---|---|
item# | 75055 |
Brand | Briggs & Stratton |
Manufacturer's Warranty | 24 months parts/24months labor |
Ship Weight | 151.0 LB |
Engine Displacement | 724 cc |
Engine Type | V-twin OHV |
Shaft Diameter | 1 in |
Shaft Length | 3.15 in |
Fuel Type | Gasoline |
Start Type | Electric |
Shaft Keyway | 0.25 in |
Crankshaft | Vertical |
Cylinders (qty.) | 2 |
Cylinder Bore | Cast Iron |
Net Power Output | 25 HP |
Fuel Tank | No |
Oil Capacity | 2 qt |
Low Oil Shutdown | No |
Low Oil Alert | No |
Max. RPM | 3,300 |
| Attribute | Specification |
|---|---|
CARB Approved | No |
Shaft Rotation (From PTO Shaft Side) | Counter Clockwise |
Governor System | Mechanical |
Ignition System | Electronic |
Carburetor | Yes |
Lubrication System | Full Pressure |
Bearing Type | Ball |
Auto Compression Release | Yes |
Cooling System | Air |
Bore | 3.12 in |
Stroke | 2.89 in |
Air Cleaner Type | Single Element |
Choke Control | Automatic |
Throttle Control | Remote |
Fuel Filter | Yes |
Charging System Amps | 16 |
Muffler Included | No |
Product Weight | 91.0000 lb |
Dimensions L x W x H (in.) | 19.12 x 18.0 x 15.5 in |
Reviews
Questions & Answers
Questions
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· 8 months ago
Explain the model number please.
1 answer-
ProductExpert29· 8 months ago
Helpful?
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· 2 years ago
is this engine a 6 pin?
1 answer-
ProductExpert6· 2 years ago
The engine would be a 6 pin.
Helpful?
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· 3 years ago
what does this require for a muffler?
1 answer-
ProductExpert6· 3 years ago
Currently, we do not carry a muffler for this engine.
Helpful?
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· 5 years ago
what is the difference between #44T977-0009-G1 and #44T977-0015-G1 are they the same other than HP.
1 answer-
ProductExpert11· 5 years ago
Both units are similar in the basic design and horizontal shaft. The 44T977-0009-G1 would include features such as the mechanical starter and plain bearing/ DU (self lubricating metal polymer bearing) non flange mount. The model 44T977-0015-G1 would include plain bearing flange mounting and electric start for 12 or 24-volt gear drive.
Helpful?
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· 7 years ago
What does the G-1 stand for after the engine number?
1 answer-
ProductExpert6· 7 years ago
The G1 is the code for this model engine. The G1 would indicate the color of the blower housing on this engine.
Helpful?
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Accessories We Recommend
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Warranty
Manufacturer's Warranty
24 months parts/24months labor
Extend Your Warranty Coverage with a Northern Protection Plan (NPP)
Repair Plan — 1 Year
A Northern Protection Plan is available after adding the product to your shopping cart.
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Specifications
724 cc
724 cc
570 cc
163 cc
V-twin OHV
Professional Series OHV
Vanguard Twin
OHV
1 in
1-1/8 in
1 in
7/8 in
3.15 in
4.29 in
3.18 in
3.15 in
Gasoline
Gasoline
Gasoline
Gasoline
Electric
Electric
Recoil
Recoil
0.25 in
0.25 in
-
0.18 in
Vertical
Vertical
Vertical
Vertical
2
2
2
1
Cast Iron
Cast Iron
Cast Iron
Aluminum
25 HP
25 HP
18 HP
-
No
No
No
Yes
2 qt
2 qt
1.5 qt
0.5 qt
No
No
No
No
No
No
No
No
3,300
3,400
3,600
3,100
No
No
No
No
Counter Clockwise
Counter Clockwise
Counter Clockwise
Counter Clockwise
Mechanical
Mechanical
Mechanical
Mechanical
Electronic
Electronic
Electronic
Magnetron
Yes
Yes
Float
Bowl Type
Full Pressure
Full Pressure
Full Pressure
Splash
Ball
Ball
-
Plain
Yes
Yes
Yes
No
Air
Air
Air
Air
3.12 in
3.12 in
2.83 in
2.69 in
2.89 in
2.89 in
2.76 in
1.75 in
Single Element
Single Element
Dual Element
Single Element
Automatic
Automatic
-
-
Remote
Remote
-
-
Yes
Yes
Yes
No
16
16
9
-
No
No
No
Yes
91.0000 lb
87.0000 lb
87.0000 lb
23.0000 lb
19.12 x 18.0 x 15.5 in
16.0 x 19.0 x 18.0 in
22.25 x 19.62 x 19.62 in
13.4 x 10.25 x 9.95 in
-
-
-
1.09 qt
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