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Honda Vertical OHV Engine — 389cc, GXV Series, 1in. x 3.11in. Shaft, Model# GXV390RT1DA23

Item# 44366
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Honda Vertical OHV Engine — 389cc, GXV Series, 1in. x 3.11in. Shaft, Model# GXV390RT1DA23

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Only $769.99
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  • Overhead valve design offers, cooler, fuel-efficient operation and cast iron cylinder sleeve provides longer service life
  • Vertical shaft engine provides easy maintenance features and electronic ignition
  • Common applications include commercial turf equipment, lawn tractors and riding mowers
  • Same as item number 44367 except this engine has a spin on oil filter.
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Product Summary

The Honda Vertical OHV Engine has been an industry standard for reliability and durability to thousands of people, on thousands of applications. Overhead valve design offers, cooler, fuel-efficient operation and cast iron cylinder sleeve provides longer service life. Vertical shaft engine provides easy maintenance features and electronic ignition. Common applications include commercial turf equipment, lawn tractors and riding mowers.

What's Included
  •  (1) Engine

Features + Benefits

  • Overhead valve design offers, cooler, fuel-efficient operation and cast iron cylinder sleeve provides longer service life
  • Vertical shaft engine provides easy maintenance features and electronic ignition
  • Common applications include commercial turf equipment, lawn tractors and riding mowers
  • Same as item number 44367 except this engine has a spin on oil filter.
Key Specs
Item# 44366
Brand Honda Engines
Manufacturer's Warranty 3 year limited warranty
Ship Weight 90.0 lbs
Engine Displacement (cc) 389
Start Type Recoil
Application Commercial turf equipment, lawn tractor, riding mower
Engine Type GXV series OHV commercial-duty
Net Power Output (HP) 10.2 (7.6 kW) at 3,600 RPM
Net Torque (lbs./ft.) 17.8 (24.2 Nm) at 2,500 RPM
Shaft Output Vertical
Crankshaft D type vertical
Shaft Diameter (in.) 1
Shaft Length (in.) 3.11
Shaft Keyway (in.) 1/4
Shaft End Tapped (Diameter (in.)/Threads per inch) 7/16–20, UNF2B TAP
Shaft Rotation (From PTO Shaft Side) Counterclockwise
Bearing Type Ball bearing
Cylinders (qty.) 1
Cylinder Bore Cast iron
Bore x Stroke (in.) 3 29/64 x 2 1/2
Compression Ratio 7.7:1
Cooling System Air cooled
Air Cleaner Type Dual element
Fuel Tank Not included
Fuel Type Gasoline
Fuel Filter Yes
Oil Capacity (qt.) 1.2
Lubrication System Pressure/splash
Low Oil Alert Oil level switch
Low Oil Shutdown Oil level switch
Ignition System Transistorized magneto
Governor System Centrifugal mechanical
Carburetor Float
Throttle Control Remote (rod)
Choke Control Remote (rod)
Max. RPM 3,600
Muffler Included Yes
Auto Compression Release Yes
Bolt Circle (in.) 10
Dimensions L x W x H (in.) 17 x 15 x 15 7/8
EPA/CARB Approval (California Air Resource Board) Yes

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Replacement Parts
Call To Order: 1-800-657-0516

Mon - Fri 7:00 AM - 6:00 PM (Central)
Sat 7:00 AM - 3:00 PM (Central)

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Honda Vertical OHV Engine — 389cc, GXV Series, 1in. x 3.11in. Shaft, Model# GXV390RT1DA23 The price is $769.99.
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Hide Similarities
Engine Displacement (cc)
160 187 163 389 337
Start Type
Recoil Recoil Recoil Recoil Electric w/recoil backup
Application Walk-behind mower, chipper/vac Billy Goat lawn vac, commercial mower Walk-behind mower Commercial turf equipment, lawn tractor, riding mower Commerical turf equipment, lawn tractor, riding mower
Engine Type GCV series OHC commercial-duty GSV series OHC GXV series OHV commercial-duty GXV series OHV commercial-duty GXV series OHV commercial-duty
Net Power Output (HP) 4.4 (3.3 kW) at 3,600 RPM 5.1 (3.8 kW) at 3,600 RPM 4.3 (3.2 kW) at 3,600 RPM 10.2 (7.6 kW) at 3,600 RPM 8.9 (6.6 kW) at 3,600 RPM
Net Torque (lbs./ft.) 6.9 (9.4 Nm) at 2,500 RPM 8.3 (11.3 Nm) at 2,500 RPM 7.1 (9.6 Nm) at 2,500 RPM 17.8 (24.2 Nm) at 2,500 RPM 15.9 (21.6 Nm) at 2,500 RPM
Shaft Output
Vertical Vertical Vertical Vertical Vertical
Crankshaft N1 type N1 type - D type vertical -
Shaft Diameter (in.) 7/8 7/8 7/8 1 1
Shaft Length (in.) 3 5/32 3 5/32 3 3/16 3.11 3.11
Shaft Keyway (in.)
3/16 3/16 - 1/4 1/4
Shaft End Tapped (Diameter (in.)/Threads per inch) 3/8–24 3/8–24 3/8–24 7/16–20, UNF2B TAP 7/16–20
Shaft Rotation (From PTO Shaft Side) Counterclockwise Counterclockwise Counterclockwise Counterclockwise Counterclockwise
Bearing Type - Ball - Ball bearing -
Cylinders (qty.)
1 1 1 1 1
Cylinder Bore
Aluminum alloy Cast iron Cast iron Cast iron Cast iron
Bore x Stroke (in.)
2.5 x 2.0 2.7 x 2.0 2.7 x 1.8 3 29/64 x 2 1/2 3.2 x 2.5
Compression Ratio
8.5:1 8.5:1 8.0:1 7.7:1 7.7:1
Cooling System
Air cooled Air cooled Air cooled Air cooled Air cooled
Air Cleaner Type
Dry (paper) type Dual element Dual element Dual element Dual element
Fuel Tank Yes Yes Yes Not included Yes
Fuel Type Gasoline Gasoline Gasoline Gasoline Gasoline
Fuel Tank Capacity (qt.)
0.98 0.98 1.9 - 2.2
Fuel Pump - Yes - - -
Fuel Filter
- Yes - Yes Mesh fuel filter
Oil Capacity (qt.)
0.58 0.58 0.69 1.2 1.2
Lubrication System
Forced splash Forced splash Forced splash Pressure/splash Pressure/splash
Low Oil Alert
- - - Oil level switch No
Low Oil Shutdown - - - Oil level switch -
Ignition System
Electronic Electronic Electronic Transistorized magneto Electronic
Governor System
Centrifugal mechanical Centrifugal mechanical Centrifugal mechanical Centrifugal mechanical Centrifugal mechanical
Carburetor
Float Horizontal butterfly valve Float Float Float
Throttle Control
Remote (wire) Remote Manual Remote (rod) Remote (wire)
Choke Control
Remote (wire) Remote (wire) Remote (wire) Remote (rod) Remote (wire)
Max. RPM
3,600 3,600 3,600 3,600 3,600
Charging System Amps - - - - 3
Muffler Included
Yes Yes Yes Yes Yes
Flywheel Brake Yes Yes Yes - -
Auto Compression Release - Yes Yes Yes -
Bolt Circle (in.)
8 1/2 8 1/2 8 10 10
Dimensions L x W x H (in.)
14 3/8 x 13 x 13 13/16 14 3/5 x 13 1/2 x 13 4/5 16 5/16 x 14 1/8 x 13 7/8 17 x 15 x 15 7/8 17 x 15 x 15 7/8
EPA/CARB Approval (California Air Resource Board)
Yes Yes Yes Yes Yes