This engine will run at a maximum of 3600 RPM.
NorthStar e420 EFI Horizontal OHV Engine with Electric Start, 420cc, 1in. x 3.48in. Shaft

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- OHV overhead valve design
- CDI ignition system with electric start and recoil backup
- Bolt circle: 5in. and 6.5in.
- Mounting base: 7.7in.L x 3.38in.W (approx.)
- Cast-iron cylinder sleeve reduces bore wear to extend engine life and reduce emissions and oil consumption
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Description
Key Specs
Reviews
Q & A
Accessories
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Product Summary
Replacement compatibility may vary based on engine shaft, mounting plate, dimensions, and other specifications. Always verify specifications prior to purchase. Please see product manual for additional information.
What's Included
- (1) e420 EFI Horizontal OHV Engine (1) Sparkplug wrench
Downloads

Features + Benefits

- OHV overhead valve design
- CDI ignition system with electric start and recoil backup
- Bolt circle: 5in. and 6.5in.
- Mounting base: 7.7in.L x 3.38in.W (approx.)
- Cast-iron cylinder sleeve reduces bore wear to extend engine life and reduce emissions and oil consumption
- Easy-to-install model for small engine needs
- EFI carburetor allows for fuel efficiency and easy starting in all weather conditions
- Heavy-duty 6.2L metal fuel tank
- LED illuminated push-button start
- USDA forestry approved
- Spark Arrestor
- Forged-steel crankshaft for superior strength in high-torque PTO applications
- Dual ball bearings reduce friction and wear, delivering smooth operation and longer life
- Internal oil splash enhancement system delivers extra lubrication
- Sound pressure balanced muffler
- Black aluminum alloy cylinder head cover
- All-metal camshaft
- Upgraded deep-groove ball bearing
- Low oil shutdown turns engine off if it runs low on oil, preventing serious damage or failure
- Pleated paper air filter and foam pre-cleaner for superior protection from harmful debris
Key Specs
| Attribute | Specification |
|---|---|
item# | 114656 |
Brand | NorthStar |
Manufacturer's Warranty | 5 year limited warranty |
Ship Weight | 94.4 LB |
Engine Displacement | 420 cc |
Engine Type | OHV |
Shaft Diameter | 1 in |
Shaft Diameter Metric | 25.4 mm |
Shaft Length | 3.48 in |
Shaft Length Metric | 88.5 mm |
Start Type | Electric and Recoil |
Shaft Keyway | 2 13/64 in |
Net Torque | 25 ft-lbs. |
Crankshaft | SAE J609 EXT 4 Straight Keyed Shaft Dia.: 25.4mm (1 In.) |
Cylinders (qty.) | 1 |
Cylinder Bore | 3.54in. |
Net Power Output | 9.8 HP |
Compression Ratio | 8.5:1 |
Fuel Tank | Yes |
Fuel Tank Capacity | 6.55 qt |
| Attribute | Specification |
|---|---|
Oil Capacity | 1.16 qt |
Low Oil Shutdown | Yes |
Low Oil Alert | Yes |
Shaft Rotation (From PTO Shaft Side) | Counter Clockwise |
Governor System | Yes |
Ignition System | CDI |
Carburetor | EFI |
Lubrication System | Splash |
Bearing Type | Ball |
Auto Compression Release | Yes |
Cooling System | Air |
Bore | 3.54 in |
Stroke | 2.6 in |
Air Cleaner Type | Foam + paper |
Throttle Control | Adjustable |
Charging System Amps | 3 |
Muffler Included | Yes |
Bolt Circle | 5 and 6.5 in in |
Mounting Base Length | 7.7 in |
Mounting Base Width | 3.38 in |
Reviews
Questions & Answers
Questions
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· 2 years ago
what is the RPM on this. i am replacing a Honda GX270 (270cc) engine which rotates at 3,600 RPM
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NorthstarExpert12· 2 years ago
Helpful?
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Josh· 2 years ago
all standard ope engines have a max rpm of 3600 rpms.
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kelvinm· 2 years ago
3600 rpm, when you can get it to run.
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· 6 months ago
Engine Oil Capacity?
1 answer-
NorthstarExpert12· 6 months ago
This engine has a 1.16 quart oil capacity.
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· 7 months ago
Would this run e10, e15, e30, e85 ethanol?
1 answer-
NorthstarExpert12· 7 months ago
This engine will not run E15, E30 or E85 ethanol. The fuel used should not contain more than 10% ethanol.
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· 10 months ago
Could this work for a air compressor
1 answer-
NorthstarExpert12· 10 months ago
This engine can be used to power an air compressor. Its horsepower, torque, shaft configuration, and commercial-grade build quality suit the demands of both small portable and heavy-duty compressor pumps. Just be sure to set up the correct pulley ratio, confirm shaft and rotation compatibility, and utilize proper throttle/unloader control for safe operation.
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· 11 months ago
Is this engine equipped with reverse
1 answer-
NorthstarExpert12· 11 months ago
This engine only rotates counter clockwise as seen from the PTO shaft.
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· a year ago
How many amps does it charge at?
1 answer-
NorthstarExpert12· a year ago
The charging system is rated at 3 amps.
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· a year ago
could this motor be installed to a go-cart with a wire throttle ?
1 answer-
NorthstarExpert12· a year ago
This engine does come with an option for a throttle cable.
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Anonymous· a year ago
Where can I buy parts for my e420 efi. Looking for a new throttle control with start stop button.
1 answer-
NorthstarExpert12· a year ago
For assistance with identifying part numbers, please contact our NorthStar Department by calling 1.800.270.0810.
Parts for this engine will be available through our sister company, Jacks Small Engines. Please visit www.JacksSmallEngines.com for pricing and availability.
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· a year ago
Does the stated specification width of 14.57in for the e420 include the length of the shaft sticking out, or is that additional?
1 answer-
NorthstarExpert11· a year ago
The overall dimensions including the shaft are 20.28" L x 14.57" W x 18.31" H.
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· a year ago
is it possible to get remote stop start throttle controls for this engine ?
1 answer-
NorthstarExpert12· a year ago
At this time, we do not offer a remote stop/start throttle control for this engine.
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Warranty
Manufacturer's Warranty
5 year limited warranty
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Item # 114656
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Specifications
420 cc
688 cc
688 cc
688 cc
OHV
GX Series OHV V-twin Commercial-duty
GX Series OHV V-twin Commercial-duty
GX Series OHV V-twin Commercial-duty
1 in
1 in
1 in
1 in
25.4 mm
-
-
-
3.48 in
2.9 in
2.9 in
2.9 in
88.5 mm
-
-
-
Electric and Recoil
Electric
Electric
Electric
2 13/64 in
0.25 in
0.25 in
0.25 in
25 ft-lbs.
35.6 ft-lbs.
35.6 ft-lbs.
35.6 ft-lbs.
SAE J609 EXT 4 Straight Keyed Shaft Dia.: 25.4mm (1 In.)
Q-type
Q-type
Q-type
1
2
2
2
3.54in.
Integrated
Integrated
Integrated
9.8 HP
20.8 HP
20.8 HP
20.8 HP
8.5:1
9.3:1
9.3:1
9.3:1
Yes
No
No
No
6.55 qt
-
-
-
1.16 qt
2 qt
2 qt
2 qt
Yes
-
-
-
Yes
Yes
No
Yes
Counter Clockwise
Counter Clockwise
Counter Clockwise
Counter Clockwise
Yes
Mechanical
Mechanical
Mechanical
CDI
Electonic, Digital CDI W/variable Ignition Timing
Electonic, Digital CDI W/variable Ignition Timing
Electonic, Digital CDI W/variable Ignition Timing
EFI
2-barrel, Fuel Cut Solenoid, Inner Vent
2-barrel, Fuel Cut Solenoid, Inner Vent
2-barrel, Fuel Cut Solenoid, Inner Vent
Splash
Full Pressure
Full Pressure
Full Pressure
Ball
-
-
-
Yes
-
-
-
Air
Air
Air
Air
3.54 in
3.1 in
3.1 in
3.1 in
2.6 in
2.8 in
2.8 in
2.8 in
Foam + paper
Dual Element
Dual Element
Dual Element
Adjustable
Remote
Manual
Remote
3
20
17
3
Yes
No
No
No
5 and 6.5 in in
-
-
-
7.7 in
-
-
-
3.38 in
-
-
-
-
5.25 in
5.25 in
5.25 in
-
Remote
Manual
Remote






