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.
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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
Reviews
Q & A
Accessories
Warranty
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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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· 6 months ago
Explain the model number please.
1 answer-
ProductExpert29· 6 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
163 cc
747 cc
725 cc
V-twin OHV
Vertical OHV Gas
Vertical Gas
Vertical Gas
1 in
-
1-1/8 in
1 in
3.15 in
-
3.35 in
3.16 in
Gasoline
-
Gasoline
Natural Gas
Electric
Pull
Electric
Recoil
0.25 in
-
3.827 in
-
Vertical
-
Hardened
Hardened
2
-
2
2
Cast Iron
-
Cast Iron
Cast Iron
25 HP
-
25 HP
21 HP
No
-
-
-
2 qt
-
2 qt
2 qt
No
-
Yes
No
No
-
-
No
3,300
-
3,600
3,600
No
No
-
-
Counter Clockwise
-
Counter Clockwise
Counter Clockwise
Mechanical
-
Variable Speed
Mechanical
Electronic
-
Electronic
-
Yes
-
Smart Choke
Evap/carb
Full Pressure
-
Full Pressure
Pressure
Ball
-
Parent Material
Parent Material
Yes
-
-
-
Air
-
Air
Air
3.12 in
-
3.3 in
3.3 in
2.89 in
-
2.7 in
2.6 in
Single Element
-
Single Element
Single Element
Automatic
-
Remote
Remote
Remote
-
Remote
Remote
Yes
-
-
Yes
16
-
15
15
No
-
No
No
91.0000 lb
-
lb
92.0000 lb
19.12 x 18.0 x 15.5 in
-
20.5 x 16.2 x 19.9 in
18.8 x 17.5 x 17.0 in
-
-
55.3 ft-lbs.
40.7 ft-lbs.
-
-
3.356 in
-
-
-
9.1:1
9.1:1
-
-
7.656 in
10 in
-
-
5.736 in
10 in
-
-
7.656 in
10 in
-
-
-
2 qt
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