Honda 190cc engine

Honda 190cc engine DEFAULT

Is it possible to put a 190cc motor on a 160cc mower, Honda HRT?

Can't believe I found this thread on page 2! Guess I never hit the email notification from this site!

Saxman, I appreciate your insight but to be honest if I had the knowledge and will to swap motors on the HRT it would be rational thinking to assume I tried everything else. Never did I say I didn't, correct?

I ended up finding a brand used (I said it!) HRX217HXA and what a machine it is! The very first time I cut my grass with it I hasn't mowed in 3weeks and with the height all the way up, I was cutting ~8" of grass off the top. Not only that but it rained the entire previous day and only stopped raining some time the night before when I was asleep. I cut at about 10am do no time for the lawn to dry. It was the epitome of the test I was looking for and on 100% mulch, there was barely a blade left to speak of! I was more than satisfied and actually very impressed with the cut quality in the given conditions.

I still miss my HRT though from time to time. It was a ber nimble mower that could be tossed about with ease. Not so with the HRX, it's much more substantial and has roughly 20lb or so more bulk to contend with.

Now I can cut my grass whenever I need to and need not worry about over cutting or stragglers left behind!


Honda Lawn Parts Blog

GC190The GC190 is one of the most popular small engines on the market for lawn and shop equipment, but even an engine as reliable as this Honda needs maintenance to keep performing year after year. This guide will walk you through the steps needed to keep your motor working.


  • Make sure the engine is off before you begin any repairs. If possible, wait at least a half hour to ensure the motor is completely cool to prevent burns from hot engine parts.
  • If the engine needs to be started, do so in an area with good ventilation to prevent carbon monoxide buildup.
  • To prevent gasoline ignition, only use non-flammable solvents for cleaning and keep sparks, flames and cigarettes away from the engine.

Maintenance Schedule

Before each use: Check the engine oil level and air filter

First month or 5 hours: Change the oil

Every three months or 25 hours: Clean the air filter. More frequent cleanings may be needed when used in dusty areas.

Every 6 months or 50 hours: Change the oil. If the engine is always under heavy load or used in high temperatures, change the oil every 25 hours.

Every year or 100 hours: Check the spark plug, clean the spark arrester and have the idle speed, fuel tank, fuel filter and valve clearance checked by a service center.

Every 250 hours or two years: Have a service center check the fuel tube and combustion chamber.


This engine is made to use fresh unleaded with an octane rating of at least 86 and a maximum of 10% ethanol (E10) or 5% methanol. Never fill the tank past the base of the filler neck. Move the engine at least 10 feet (3 meters) away from the refueling location before starting to prevent vapor ignition.


Engine oil should be certified API SJ or later. 10W-30 is recommended, but 5W-30 can also be used at most temperatures, and SAE 30 above 50°F (10°C.)

To check the oil, remove the oil filler cap/dipstick, wipe it clean, and reinsert it in the hole without screwing it in. Check the level on the marks on the dipstick.

To change the oil, place a container below the engine, then remove the filler cap/dipstick, followed by the drain plug, directly below and to the left of the oil fill hole. Once the oil has drained, reinstall the drain plug and add oil until it comes up to the edge of the oil fill hole. Reinstall the filler cap/dipstick.

Air Cleaner

To access the filter, press the latch tabs on the side of the cover and tilt the cover up to remove.

To clean the filter, tap it against a hard surface to loosen the dirt. Wipe away any dirt on the air cleaner body before reinstalling the filter.

Spark Plug

To remove the spark plug, unplug the spark plug wire, then unscrew the plug using a plug wrench.

The spark plug gap should be set to 0.028-0.031 inches (0.70-0.80 mm.) Replace the plug if the electrode is worn, the insulator is cracked, the washer is damaged or the plug head is fouled.

To install the plug, screw it into the engine by hand. Once it’s tight, use the wrench to turn it another 1/8-1/4 turn if the plug is used, or 1/2 turn if the plug is new. Reattach the spark plug wire.

Spark Arrester

Not all GC190 engines have a spark arrester, but one can be installed if it is needed to comply with local fire laws.

To access the arrester, remove the three 6mm bolts holding the muffler protector over the muffler. Remove the protector, then take out the 4mm screw keeping the arrester in the muffler.

Clean the arrester with a wire brush, removing any carbon buildup. The arrester should be replaced if it has any cracks or holes.

Reinstall in reverse order.


Always clean the motor before storage. Never use a hose or pressure washer to clean the engine, as this can force water inside the crankcase.

To prevent oxidation, treat the fuel with a gas stabilizer and fill the fuel tank completely to reduce contact with air. Untreated gasoline should not be used if it is over 30 days old.

For long term storage, all fuel should be removed from the engine. Use a siphon pump to move gas in the fuel tank into a fuel can. To drain the carburetor, remove the drain screw at the base of the carburetor bowl, located behind the air cleaner.

The oil should be changed before storing, and 1-2 teaspoons (5-10 cc) of oil should be added to the inside of the engine through the spark plug hole. Once the oil has been added, pull the starter several times to spread it around the inside of the motor, then reinstall the plug.

Store the engine in a well-ventilated area to prevent the buildup of gasoline fumes. Covering the motor in a non-porous sheet can trap moisture, promoting rust.

Where to Get Parts and Accessories For Your Honda GC190

When you need parts for your Honda small engine, turn to We’re a certified Honda small equipment dealer, and we can ship anything you need to keep your GX190 running whether you’re in the U.S. or Canada. Start your search at our Honda engine section where you can compare applications, part numbers and factory diagrams so you can be sure you’re ordering the parts you need.

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Durability comes standard.

The GSV190 offers the best of two worlds. Higher durability, with features like a cast iron cylinder liner and three-piece oil control. And the benefits of a lightweight, compact, quiet OHC design. It's an excellent choice for demanding homeowner applications and commercial equipment alike.

Common Applications
  • Pressure washers
  • Lawn mowers
  • Commercial lawn and garden
  • Forestry equipment
  • Agricultural equipment
Fuel Efficient, High Output Operation
  • Compact combustion chamber, overhead cam design, and uniblock construction reduce fuel consumption Learn More
  • Powerful torque across a wide RPM range helps reduce engine speed drop from sudden load increases.
Compact and Lightweight
  • The lightest engines in their class
  • Overhead cam, overhead valve design
  • Tough resin overhead cam for durability and quietness
  • Uni-block construction
Quiet, Smooth Performance
  • Internal timing belt provides quiet operation Learn More
  • Valvetrain and gear noise is minimized
  • Precision engineered and machined components result in lower vibration
Proven Reliability
  • Cast iron cylinder liner
  • Dual element air cleaner for increased life
  • Ball bearing suported crankshaft
  • Dua-Lube System provides superior engine lubrication
  • 3 piece oil control ring for long life
  • Proven lifetime timing belt design Learn More
Easy to Use and Maintain
  • Auto Choke System available Learn More
  • Easy access oil drain and fill
  • Easily accessible spark plug
  • Proven lifetime timing belt design
Easy Starting
  • Horizontal cross-flow intake port to smooth the flow of fuel
  • Automatic mechanical decompression Learn More
  • Electronic ignition



Engine TypeAir-cooled 4-stroke OHC
Bore x Stroke2.7 x 2.0 in (69 x 50 mm)
Displacement11.4 cu in (187 cm3)
Net Power Output*5.1 HP (3.8 kW) @ 3,600 rpm
Net Torque8.3 lb-ft (11.3 Nm) @ 2,500 rpm
PTO Shaft RotationCounterclockwise (from PTO shaft side)
Compression Ratio8.5:1
CarburetorHorizontal type butterfly valve
Ignition SystemTransistorized magneto
Starting SystemRecoil
Lubrication SystemSplash
Governor SystemCentrifugal Mechanical
Air CleanerDual element
Oil Capacity0.58 US qt (0.55l)
Fuel Tank Capacity0.98 U.S. qts (0.93 liter)
FuelUnleaded 86 octane or higher
Dry Weight28.7 lb (13.0 kg)
WARNING: California Prop 65 Info


Length (min)14.6" (371mm)
Width (min)13.5" (343mm)
Height (min)13.8" (349mm)


Performance Curves

GSV190 Performance Curve

The SAE J1349 standard measures net horsepower with the manufacturer’s production muffler and air cleaner in place.Net horsepower more closely correlates with the power the operator will experience when using a Honda engine powered product.The power rating of the engines indicated in this document measures the net power output at 3600 rpm(7000 rpm for model GXH50, GXV50, GX25 and GX35) and net torque at 2500 rpm, as tested on a production engine. Mass production engines may vary from this value.Actual power output for the engine installed in the final machine will vary depending on numerous factors, including the operation speed of the engine in application, environmental conditions, maintenance and other variables.


General Applications

Internal Combustion Engine Products:

WARNING: This product can expose you to chemicals including soots, tars, and mineral oils, which are known to the State of California to cause cancer, and carbon monoxide, which is known to the State of California to cause birth defects or other reproductive harm.

For more information go to

Honda’s Auto Choke System This user-friendly system is truly automatic, eliminating any manual manipulation of levers.

The engine starts easily whether cold or hot and is ready to use immediately. Once the engine is up and running, the Auto Choke automatically returns to an optimal operating position.

All engines

Honda’s automatic mechanical decompression system is designed to give you quicker, easier starts.

This system, which is connected to the camshaft, reduces compression by opening the exhaust valve slightly when the engine is being started.  This reduces the amount of force needed to start the engine and improves starting performance.

The system disengages automatically after the engine starts to prevent any power loss during normal operation.

Mini 4-Stroke Series

In addition to the milder operating noise of 4-Stroke engines in general, the Mini 4-Stroke’s belt-driven OHC design further reduces unpleasant mechanical noise.   Its lighter piston and other moving parts help keep vibration to a comfortable level.

SAE J1939 CAN Bus (Controller Area Network) communication functionality provides ECU (Electronic Control Unit) connectivity with less wiring. It enables a variety of complicated electronic controls to be linked to improve operability.

GC series, GS series

A truly innovative combination of a compact combustion chamber, overhead cam configuration and uniblock construction significantly reduces fuel and oil consumption as compared to conventional side-valve engines.

Honda’s simple design has made the GC and GS Series lighter and more compact than any engine in their class. Plus, simple construction has minimized the number of parts, making the engine more reliable and easier to operate.

SAE J1939 CAN Bus (Controller Area Network) communication functionality provides ECU (Electronic Control Unit) connectivity with less wiring. It enables a variety of complicated electronic controls to be linked to improve operability.

Honda Cycloflow™ technology enhances the air-fuel mixture and makes it easier to start the engine and idle smoothly while making it more resilient to poor quality fuel.

New V-shaped valves and a pent-roof combustion chamber enable air in cylinder to flow more smoothly and maximizes the mixing of fuel. The longer stroke design also enhances turbulence in the cylinder, helping the mixture of air and fuel.

Drive-By-Wire unlike conventional models, has no throttle cable. An ECU controls a throttle motor via an electrical signal. Ideal throttle control is possible, from conventional type user-operated throttle control, to a variety of automatic control by the ECU.

Electronic Fuel Injection (EFI), which detects the state of the engine using sensors supplies the optimum amount of fuel to the engine according to its working conditions. EFI Improves fuel economy, reduces exhaust gas, and achieves excellent usability and easy maintenance.

Electronic Fuel Injection eliminates the need for a manual choke, making starting simple. In addition, starting is improved as the fuel is sealed within the injector and fuel hose reducing fuel deterioration, and making smooth engine startup possible even after long-term storage.

iGX Series

The electronic governor minimizes governor droop.  This increases available power.

For most normal engines, available power is decreased when the engine is approaching wide open throttle.

The iGX’s advanced electronic governor eliminates this by electronically controlling the throttle to achieve a higher effective power output.

Engine diagnosis utilizes Dr. H. software, linked via USB to tablet or PC for quick repairs.

The new integrated Fuel-Off position on the engine control allows the user to stop the flow of fuel to the engine when pressure washing is complete.

How does it work - With the engine running and the switch placed in the Fuel-Off position, the fuel flow to the carburetor is stopped. The engine will continue to run until the majority of fuel remaining in the carburetor is consumed and the engine shuts down.

Using the Fuel Off feature when shutting your pressure washer down helps prevent sticky carburetor buildup which makes for cleaner storage and easier future starting.

Mini 4-Stroke Series

The innovative design of Honda’s Mini 4-Stroke engines allows them to be used and stored in any position for full 360° usability. Upright, sideways, even upside down – the Mini 4-Strokes will still run great.

An exclusive Honda rotary-slinger lubrication system keeps oil in a completely misted state and circulates it using pressure fluctuations generated by the movement of the piston.

Built-in passages effectively return the circulated oil to the oil reservoir from every part of the engine.  An oil return port positioned in the center of the reservoir prevents oil from accidentally flowing into the combustion chamber.

Mini 4-Stroke Series

Efficient 4-Stroke technology not only offers superior fuel economy, it also requires no mixing of oil in the engine’s fuel supply.  This substantially reduces both oil consumption and the emission of unburned oil in the exhaust.

The results include better all-around environmental performance and operating costs that actually decrease the more the engine is used!

V-twin Series

Honda’s hemispherical combustion chamber was inspired by our proven racing technology.  It offers the highest V-Twin compression ratio on the market.

The power is transmitted through forged-steel connecting rods and a forged-steel crankshaft, supported by a full-pressure lubrication system.

  • 9.3:1 compression ratio generates tremendous power.
  • Excellent combustion efficiency.
  • Allows a radial configuration to create high volumetric efficiency.
  • Places the spark plug near the center of the chamber for optimal flame travel.

This means increased engine efficiency and more power to your application.

V-Twin Series

The lubrication system uses a high capacity pump with discrete chambers.  This facilitates consistent oil delivery.

The high output oil pump offers numerous benefits:

  • Twice the capacity of the previous model
  • Redesigned pump cover and sealing system ensure engine reliability
  • Full pressure lubrication to the flywheel, PTO, and connecting-rod bearings

The result?

  • Reduced friction
  • Extended engine life
  • Less mechanical engine noise
V-twin Series

The idea of integrating the cylinder & head into one unit is radical. Radically smart. It eliminates the head gasket, head bolts, and allows for more airflow and better cooling.

Speaking of cooling, improved cooling means better combustion management. Cooling is also improved by each of the lightweight aluminum pushrods being housed in a separate tube to achieve enhanced airflow.

When you put it all together (with fewer parts) you get an engine with reduced emissions and greater-than-ever durability.

iGX Series

Honda iGX engines feature an integrated ECU (electronic control unit) with a self-tuning regulator (STR) governor system.

The innovative ECU monitors and controls engine functions including Throttle, Choke, Ignition Timing, and Oil Alert.  On some models, it also offers programmable governor and throttle modes for unprecedented flexibility.  A diagnostic LED helps with trouble shooting.  Stepper motors precisely control throttle and choke position.

This allows the engine to communicate with the machine it is powering.

  • Operation is automated
  • Control becomes surer, faster and easier.
  • Enables drive-by-wire remote control operation of the engine, regulating functions such as starting, throttle, ignition timing and diagnostics.
  • Engine speed can be programmed and varied based on the equipment application's load and speed requirement.
  • Easier for inexperienced users to operate
  • Easily maintained - Ideal for rental applications

Control panel mounted LED indicator informs the user about potential problems using 10 different trouble codes. The indicator is designed to stop the engine, or alert the operator of potential issues, helping to protect and extend engine life.

GC series, GS series

Honda’s GC and GS engines use the world’s first small engine internal timing belt, designed to last the lifetime of the engine.

Small engine timing belts are usually external and are subject to wear caused by dirt.  Honda’s internal timing belt runs in oil, eliminating the need for conventional drive gears. 

This design:

  • Improves lubrication,
  • Reduces the weight of the engine, and
  • Provides quieter operation.
GX series, V-twin series, iGX series

Honda’s Oil Alert system helps to prevent engine seizure due to a low oil condition.

The system consists of an oil level sensor inside the crankcase.  When the oil reaches a level that is too low for safe operation, the engine warns you or stops automatically. 

Honda’s All-New GCV pressure washer engines offer an overhead valve (OHV) layout. The OHV design, new V-shaped valves and a pent-roof shape of combustion chamber enable air in cylinder to flow more smoothly increasing combustion efficiency, allowing for higher compression ratios and greater power output.

The OHV layout, with enhanced valve positioning and combustion chamber, the new GCV170 pumps out an increase in torque of 18 percent and a nine percent horsepower gain over the GCV160; GCV200: also showed a strong increase in torque of 13 percent and 10 percent horsepower gain over the GCV190

STR Governor (Self Tuning Regulator) minimizes engine droop seen with traditional mechanical governor systems by electronically regulating the throttle opening to maintain constant, stable engine speed even under changing load conditions, resulting in exceptional performance and enhanced user satisfaction.

GX240-390, V-Twin series, iGX series

Honda’s Variable Timing Digital CDI ignition allows optimal ignition timing based on engine speed. The result:

  • Excellent starting,
  • High power output,
  • Reduced fuel consumption, and
  • Outstanding emissions performance.

An engine rev limiter is also incorporated to prevent over-revving.

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2021 © American Honda Motor Co., Inc. All information contained herein applies to U.S. products only.

How To Rebuild a Lawn Mower Engine ( Honda GCV160, GCV170, GCV190, GCV200)

Honda Undertaking Full Model Change of GCV Series of General Purpose Engines

While the current GCV Series consists of two models, the GCV160 and GCV190, the all-new GCV Series will offer three models: GCV145 (145 cm3), GCV170 (166 cm3) and GCV200 (201 cm3). Without compromising its excellent fuel economy, the all-new GCV Series realizes class-topping*3 power output and torque by improving combustion technologies through various measures including a change in the combustion chamber design. At the same time, Honda pursued usability as a power unit for power products designed for household use, which includes improvement of startability and a reduction of vibration.

Moreover, the Kumamoto Factory, where the all-new GCV Series engines will be produced, adopted an automated assembly line for GCV engines that utilizes know-how Honda has amassed through the production of motorcycles, which makes possible high-efficiency and high-quality engine production.

Furthermore, the all-new GCV Series engines also will be installed to Honda push-mowers which will go on sale in Australia, North America, Japan and other areas.


Engine honda 190cc



Legendary Reliability. Advanced Performance

  • 100 cc – 389 cc
  • Powerful OHV design
  • Lower noise levels, vibration, and better fuel economy
  • Horizontal or vertical crankshaft

Learn More



Raising the bar. On everything.

  • 688 cc
  • Pressurized and filtered lubrication
  • High output performance
  • Superior fuel economy
  • Proven reliability.
  • Horizontal or vertical crankshaft

Learn More



Taking intelligence to a whole new level.

  • 389 cc
  • Advanced technology for multi function, high performance
  • Integrated ECU
  • Horizontal crankshaft only

Learn More

iGX v-twin



  • 688 cc – 779 cc
  • Electronic Fuel Injection
  • Drive-By-Wire Control
  • STR (Self Tuning Regulator) Governor
  • Horizontal or Vertical crankshaft

Learn More



Legendary Reliability Advanced Performance

  • 160 - 187cc
  • Lightweight, compact, quiet OHC design
  • Optimal power for residential applications

Learn More

GCV200 Pressure Washer



  • 166 - 201cc
  • Peak performance for pressure washer applications

Learn More



The best of both worlds.

  • 187cc
  • High durability
  • Lightweight, compact, quiet OHC design

Learn More

Mini 4


Meet the world’s lightest OHC engine.

  • 25-50cc
  • Full 360° operation
  • Use & store in any position

Learn More

Mini 4



  • Lithium-ion Battery
  • 2kW Class Brushless DC Motor
  • Integrated or Separated Motor

Learn More

Superior Quality



Find out why Honda Engines should be your choice.

Learn More

  • We use cookies to improve your experience on this site and show you personalized advertising. To find out more, read our cookie policy.

2021 © American Honda Motor Co., Inc. All information contained herein applies to U.S. products only.

190cc Honda Trail 70 First Ride! 19HP Restomod Honda CT70 Build

Honda GCV200 Engine - Specifications

The all-new Honda GCV200 engine, a powerful addition to the Honda GC Series, is designed specifically for premium, residential power equipment applications such as the newly redesigned HRX Series lawn mowers. The GCV200 delivers more power and more torque—10 percent more as compared to the GCV190 engine it replaces. Innovative Honda design features, including an improved combustion chamber shape, advanced auto choke design, and easier fuel and oil filling, make the GCV200 engine convenient to use and operate. The new engine is more streamlined and more compact than other engines in the same class, while the configuration of the Honda GCV200 incorporates the CycloFlow design, which strengthens turbulence in the cylinder and provides more stable combustion. The result is greater resistance to lower quality fuel and ease of starting, along with a smoother idle. 

Engine Model


Engine Type

Air-cooled 4-stroke single cylinder gasoline engine (OHV)

Bore x Stroke (mm)

1/66 x 59

Total Displacement (cm3)


Maximum Power Output* (kW[PS]/rpm)

4.2 [5.7] / 3,600

Maximum Torque (N▪m[kgf▪m]/rpm)

12.7[1.30] / 2,500

Rated Output (kW[PS]/rpm)

2.8[3.8] / 3,000

Compression Ratio



Horizontal type butterfly valve

Ignition System

Transistorized magneto

Starting System


Speed Control System


Choke Types

Manual and Automatic

Lubrication System

Forced spray

Spark Plug


Governor System

Centrifugal flyweight type

Air Cleaner

Dry (paper filter)

Length x Width x Height** (inches)

16.34 x 12.99 x 14.13

Engine Oil Reserve Capacity (L)


Fuel Tank Capacity (L)



Automotive grade unleaded gasoline

Fuel Consumption (L/hour) at continuous rated output at 3,600 rpm


Dry Weight (lbs.)


*The SAE J1349 standard measures net horsepower with the manufacturer’s production muffler and air cleaner in place. Net horsepower more closely correlates with the power the operator will experience when using a Honda engine powered product. The power rating of the engines indicated in this document measures the net power output at 3600 rpm (7000 rpm for model GXH50, GXV50, GX25 and GX35) and net torque at 2500 rpm, as tested on a production engine. Mass production engines may vary from this value. Actual power output for the engine installed in the final machine will vary depending on numerous factors, including the operation speed of the engine in application, environmental conditions, maintenance and other variables.

**Total height varies depending on model type; the height indicated here is based on the N3 type crankshaft.

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