Replacing The Engine On The Tiller

What gives the replacement of the engine on the Tiller Neva MB1 or MB2?

Replacing The Engine On The Tiller

It is possible to replace the engine on the chiller not only with the model of the brand with which it was supplied, but also with another one, for example, of greater or vice versa of lower power. This raises the question. which engine to choose for the Tiller Neva? The first models of Neva tillers in the initial configuration were produced with a Russian manufacturer’s engine of the DM-1K type. At this time, the new Tilleri Neva can be supplied with engines of foreign production Robin-Subaru, BriggsStratton, Honda, etc.

Replacing the engine for the Neva Tiller with an imported one will make its service life longer, but such motors are much more expensive than domestic ones. Therefore, if you have to replace the engine on the Neva Tiller, you need to know that such motors are durable, wear-resistant, but also expensive. You need to know what alternative there is to Japanese-made products. It is also necessary to consider whether the replacement will be done by hand or at service stations.

HONDA engine advantages

  • High power, from 1.5 to 12 HP.
  • Have high performance.
  • The engines of this company are equipped with a splash lubrication system, which will significantly increase the engine resource.
  • They have forced air cooling, which will allow the engine to run longer. Thanks to this system, the engine does not overheat.
  • Starting the engine after a standstill is quick and easy thanks to the automatic decompressors. The system is started manually and the start time does not depend on weather conditions;
  • Honda engines are reliable and economical, meet environmental standards.

Engines for Tiller Neva

Tilleri Neva MB1 and MB2 are suitable for use in small areas of personal plots, summer cottages and even small farms. With fairly frequent use, sooner or later it will be necessary to replace the tiller engine. As the people say. nothing is eternal.

Robin Subaru engine advantages

  • Body strength and long service life. Advanced air purification system, forged steel crankshaft with bearings on both sides. The ignition coil is replaced by electronic ignition, and the casings made of cast iron increase the engine’s service life.
  • Very high reliability. Thanks to special cooling channels in the block and head, the oil does not overheat even under heavy loads. Also, the use of metal instead of plastic increases reliability.
  • Engines are assembled in Japan at a production site where a high degree of automation has been achieved, which allows the production of a huge number of parts.
  • Low oil consumption. Due to the vertically arranged cylinders, uniform lubrication of all rubbing parts occurs, which achieves a sufficiently large torque on the shaft. Special design of the oil intake ring and excellent crankcase ventilation minimizes oil consumption.
  • Reduced noise due to rigidly mounted crankshaft and specially shaped air filter, replacement of the piston and camshaft section.
  • Quick start. Large spool in the starter quickly overcomes resistance during start-up, and automatic compression reduction for the operator makes starting effort easier.
  • High environmental friendliness. Subaru engines are on a par with the European environmental requirements, which were introduced in 2002, and the Japanese exhaust gas requirements of 2003.
  • Compact and lightweight design. Although the motors are strongest for their size, they are small and lightweight. This has been achieved through modern computer technology. The minimum distances between units and assemblies are achieved due to modern housing materials.

Options for replacing the engine on the Neva MB 1 or MB2 tiller

There are many options for replacement, but the most common ones are:

  • Robin-Subaru engine installation;
  • Application of the Chinese engine for the Tiller Neva;
  • Replacement for a Honda engine.

The replacement option is chosen based on the price-quality ratio, maintainability, climatic factor and other nuances.

The advantages of Chinese engines

  • Relatively low cost.
  • Modern designs.
  • High reliability.
  • Versatile in their purposes.
  • Availability of spare parts.

Chinese tiller motors have gained a lot of popularity due to their advantages. Depending on their purpose, motors are completed with additional equipment (gearboxes, starters, and others). Only the latest equipment is used in the production of engines. After purchasing such an engine, you can immediately use it, without additional preparation. They are perfect for all types of tillers, even homemade ones.


  • High performance.
  • Power 1.5-12 HP.
  • Splash lubrication system, which increases the functions of the mechanism.
  • Forced air cooling system.
  • Installed automatic decompressors.
  • Full compliance with environmental requirements.

Which engine to choose


  • High strength;
  • Modern manufacturing technology;
  • Low cost;
  • Versatility;
  • Availability of spare parts.

Such devices have gained popularity because they are equipped with additional starters and gearboxes. These designs are suitable for all tillers and do not require re-equipment.


  • Differs in high environmental friendliness.
  • Complies with the requirements for permissible concentration of exhaust gases.
  • The device is lightweight and compact.
  • The smallest distance between engine components is achieved through the use of modern materials in the manufacture of the housing.
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How to change the engine on the Neva Tiller

The Neva MB1 and MB2 models were previously produced only with the Russian DM-1K engine. Now units are also produced with an imported Subaru engine, etc. First, you need to decide which engine is best suited for your tiller. If you install an imported motor, the cultivator will work much longer. But such designs are very expensive. Therefore, when replacing motor cultivator motors, you must first find out which devices are more durable, reliable and inexpensive. You need to decide what you can replace the Japanese-made systems with, and also choose who will install the mechanism: a car service specialist or the owner of a tiller.

Currently, there are many different options for replacing the engine for the Neva cultivator, the most common of which are:

  • Subaru;
  • Honda;
  • Chinese-made devices.

A suitable option is chosen depending on climatic conditions, type of soil and other characteristics.

Consider the characteristics of an engine supplied by Robin Subaru. The motor housing is made of durable material, which determines its long service life. The crankshaft is made of steel, connected on both sides by bearings, and has a high-tech air purification system. An electronic ignition system replaces the coil, cast iron sleeves increase power. Subaru motors are highly durable. Even at heavy loads, the oil will not overheat, since special channels have been created for cooling the block and the head of the device.

At present, an increased degree of depreciation of devices has been achieved. The company produces a large number of spare parts for Subaru engines. The motor does not consume much oil. The cylinders are positioned vertically, due to which all contacting parts are well lubricated. This determines a large amount of shaft torque. The crankcase ventilation is improved, the oil intake ring has a special improved design. In Subaru, the camshaft and piston cross section have been replaced. The farmer will cope with minor breakdowns when the engine is running on his own, since Troubleshooting is not difficult.

In the Subaru system, the air filter has a special design. The crankshaft is rigidly fixed, due to this there is no noise during the operation of the motor. It features fast startup. The starter is equipped with an enlarged bobbin, which helps to quickly overcome resistance during starting. The driver does not have to work hard when starting the cultivator with the Subaru engine thanks to the automatic compression reduction.

Replacing the Tiller Neva MB-1 and MB-2 engine: which one to choose, prices

During long-term operation of the Neva Tiller, it may be necessary to change the engine in the event that it fails. Replacing the engine on the chiller can be carried out not only with a mechanism of the same brand from which it was made, but also with a motor having a higher or lower power. Consider how the installation of the Tiller Neva engine is carried out.

Changing the drive belt on the tiller in the cultivator

The drive belt transfers power from the engine to the wheels of the tiller or cultivator cutter. V-belt transmission reliably transfers forces from the engine, but over time the belt wears out, cracks and breaks appear on it.

The question arises of replacing it. This can be done at specialized service centers. This is the safest option, but it will be expensive. You can replace it yourself if you have ever repaired your car and you have the skills to handle the technique.

Remove the old drive belt

Where to begin? First, remove the plastic protective cover by unscrewing the fastening nuts. Then removes the drive belt by loosening the tension between the motor pulley and the gearbox.

Some models have special devices for tensioning and loosening the belt drive. But often in motor cultivators (tillers) there is no special mechanism. To loosen the belt tension, loosen the engine mounting nuts (four pieces) and move it to the right. Then remove the belt.

Installing a new drive belt

We install a new drive belt in the reverse order. Then we tighten the belt, taking into account its obligatory sagging by 10-12 mm. Be sure to check the alignment of the motor and gearbox pulleys. We tighten the engine mounting nuts diagonally.

When idle, the belt should rotate freely on the drive shaft, but not fly off it. To bring the belt drive into working condition, the clutch handle is squeezed, the cable rises up the pressure roller, pulling the belt.

The clutch turns on / off the transmission and transfers power from the engine to the gearbox of the cultivator, the clutch handle is located on the control handle.

If the clutch transmission is not squeezed out, the gear pulley should not rotate the cultivator cutters (lead), and when the clutch handle is depressed by 1/3, the cutters begin to rotate. The belt must not slip in working order.

The clutch cable is adjusted using special bolts. Rotating them to the left or to the right, we achieve the desired position of the pressure roller to tension the belt.

In some models of cultivators there is a V-belt transmission for backward movement, its installation and adjustment is carried out according to the same principle as the main gear.

V-belt markings

Belt length in mm, e.G. 1120 Belt cross-section ratio of size mm top to diameter. Marking A on the belt section 13×8 mm, B (B) 17×11 mm, C (B) 22×14 mm, C (B) 22×14 mm, D (D) 32×19 mm, E (D) 38×23.5 mm.

What engine can be put on the Tiller Neva

Experts often rely on products from Lifan, Robin-Subaru, Patriot and Honda to replace the standard engine. Among the advantages of these devices are endurance, durability, the ability to function in harsh climatic conditions and low fuel consumption. A review of tiller motors will help you make a choice for a quality replacement.

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The advantages of Chinese engines

China-made tiller motors have become popular due to their advantages. Taking into account the purpose, the complete set of the motor includes additional units (gearbox, start, etc.). They are also distinguished by their affordable price. Neva car owners note:

  • Design that meets modern requirements;
  • Reliability;
  • Find parts quickly.

In addition, innovative equipment is used in the production of products. After purchasing a Chinese engine, you can immediately use it. no additional preparation is needed. They are suitable for any tiller, incl. And for self-made.


The devices of the Japanese brand are distinguished by a range of advantages. So, they are known for a long service life, resistance to wear and damage, and fuel consumption is minimal.

The advantages of motors from Honda also include:

  • Large selection of models with a capacity of 1.2-12 horsepower;
  • Equipped with an efficient splash lubrication system. Therefore, the terms of using engines on Neva tillers is increasing;
  • Reliability and efficiency;
  • Every Japanese engine has an automatic decompressor that guarantees the start of the device in any weather.

Even under high loads, the Honda engine does not overheat. This is possible thanks to the efficient forced air cooling system.


The valves of this well-known company became popular due to the valves located on top. Therefore, they are reliable. Another advantage is a large selection of models, which contributed to the fact that devices with the necessary parameters can fit on the Tiller Neva.

Lifan motors are not afraid of heavy loads. An air cooling system is responsible for the operation of each unit. To start a cold engine, it is equipped with a hand pump, which is required to pump fuel. Therefore, the Tiller Neva with such a "heart" can be used in any weather.

Among the other advantages are:

  • Availability;
  • High-tech;
  • Versatility;
  • Access to spare parts required for repair;
  • Correct center of gravity.

Lifan products are easy to self-service. If you observe the correct ratio when preparing fuel, then the engine’s life without repair is long.


The Patriot motor is one of the most popular among the owners of Neva tilers. Each Patriot product is compact and lightweight, while delivering superior engine power and endurance.

The brand’s strengths also include the environmental friendliness of Patriot engines. The production of engines takes place in compliance with existing standards and norms for the number and composition of emitted exhaust gases.

They are easy to install. The presence in the configuration of the necessary valves and nozzles contributes to the fact that even an inexperienced person can perform the installation of the engine in this matter.

The sharpening machine for chainsaws is a unit that will help you quickly and efficiently restore worn out.

Which is the best engine to choose for Tiller Neva

Necessary components

To assemble or disassemble the tiller engine, you need a flat, well-lit area where nothing will interfere with your work. They are looking for the same place for repairs. The installation kit for both imported and domestic tiller includes:

  • Injectors;
  • Block heads;
  • Radiators;
  • Carburetors.

Troubleshoot startup problems

Often the repair of a tiller engine is needed due to the fact that this engine does not start. If this problem occurs after winter storage, you might suspect:

  • Water contamination of fuel or oil;
  • Oxidation of electrical contacts;
  • Insulation damage;
  • Solid debris in the carburetor.

Even before the very first start-up, it is necessary to assess whether there is enough oil in the crankcase. With a lack of it, rapid destruction of the piston group is likely. Burrs in less than a second.

In this case, very serious repairs will be required, and sometimes even replacement of damaged parts. Sometimes instability in the functioning of the apparatus is provoked by leaving the lubricant composition for the winter. If this is the reason, for the first few moments after launch, clouds of white smoke will pour out of the exhaust pipe. Immediately after this, the power plant will stall.

Diesel Tillers also may not start due to lack of oil. Few models are equipped with systems that prevent the lubricant level from falling. Most people will have to monitor the health of the tiller on their own. It is also worth considering that failures occur due to the systematic use of inappropriate fuel. If the usual recommendations do not give much effect, you need to remove the candle and see if there are any oil stains.

Oil, especially carbon deposits, should be carefully cleaned. Then the candle must be dried. The cylinder is also required to dry. A very simple technique is used as "drying": repeated abrupt pulling of the starter cable. The question often arises: what to do if the tiller does not start, while it smokes black smoke.

This usually indicates that the engine is full of gasoline. It is also worth fearing damage to the piston group. If both assumptions turned out to be incorrect, you should contact the service center. Further attempts to fix the problem yourself may lead to an aggravation of the breakdown.

You can deal with such a problem if:

  • Pour out old fuel;
  • Thoroughly wash the petrol or diesel tank;
  • Clean the air filter;
  • Clean the fuel hose and jets with a compressed air jet;
  • Add fresh fuel;
  • After opening the fuel line, blow out the channel located in the fuel tank cap.

If the lubricant is clogged with fuel constantly, you need to look at the carburetor needle. It is likely that this very node has become a weak point. It is worth noting that sometimes the tiller’s motor also shoots at the muffler, and maybe even with a flame.

The most likely reason is incomplete fuel combustion. She is provoked by:

  • Gaps in the ignition system;
  • Excessively saturated fuel mixture;
  • Unjustified heating of this mixture.
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Searching for even minor contaminants is of paramount importance. If everything is clean, you need to inspect the contacts of the ignition wires. Next, check the stability of the electrodes, measure the distances between them using a special probe.

Functional failures

Quite often, among the malfunctions of the tiller engine, its unstable action appears. If the engine at idle runs in jerks, and when you try to add gas it stops altogether, the reason is rooted in a lack of fuel. Clean the screens of the fuel tank, carburetor and pipe valve. And when problems arise even at idle speed, it is advisable to check the centrifugal regulator. Traction often sticks there.

Suppose the tiller is simply slowing down without jerking. In many cases, this is due to the use of incorrectly tuned, unsuitable or simply badly worn motors. But replacing the power plant is not always wise. Installing a better quality spark plug can help. It is also worth assuming the appearance of malfunctions in the operation of the carburetor float in the high-voltage wire.

In all these situations, there is no particular need to carry out major repairs. High-quality troubleshooting is very important. It is pointless to try to increase the compression in all modern engines, anyway the decompressor will not allow you to do this.

How does it work?

To understand breakdowns and fix them, it is important to understand how everything works in a normal situation. For the sake of simplicity, let’s dwell only on models with an internal combustion engine. Previously, there were two-stroke tillers, but now they are increasingly superseded by four-stroke counterparts. Diesel devices are also gaining popularity. As for the transmission, it can be done in three different versions.

The traditional approach is to use a gear transmission. Despite a decent level of reliability, this device takes up a lot of space. Power transmission takes place using either a cone or a cylinder. Light tillers are mainly equipped with a worm gear transmission. A typical operating principle of a tiller regulator contains:

  • A device that monitors the number of revolutions;
  • The rod connecting this device to the throttle valve;
  • Spring.

The control unit operates on the basis of a pneumatic or mechanical connection. "Pneumatics" means the presence of a kind of wing that responds to the speed of the air flow. Centrifugal options involve placing a special camshaft inside the crankcase. It is complemented by small weights and an easy-to-move stem. The pull is made from wire, and the spring sensitivity determines how accurately the speed values ​​will be maintained.

The role of the gas distribution mechanism is to supply a mixture of fuel and air to the cylinder. But the same device also provides exhaust gas removal. A decompressor is used to influence the compression ratio. Gasoline engines are necessarily equipped with carburetors responsible for preparing the fuel-air mixture. Regardless of the type of fuel, the starting device plays an important role.

Tiller engine repair

  • How does it work?
  • Necessary components
  • Troubleshoot startup problems
  • Functional failures
  • Replacement and adjustment
  • Tips

Tillery are generally reliable and stable devices. But with active use, they still break down periodically. Even elaborate motors can be malfunctioning.

Replacement and adjustment

Quite often, unfortunately, it becomes necessary to completely change the motor on the tiller. When choosing a replacement device, it is recommended to give preference to products from well-known companies. Traditional prejudices about the products of Chinese factories have long since become irrelevant. To avoid overpaying funds, you need to carefully analyze how productive the power plant should be. Buying too powerful a unit is simply irrational.

Even if there is no talk of a complete replacement, it is important to know how to adjust the engine of agricultural machinery. It is advisable to start disassembly only after flushing the engine and removing oil from it. The lubricant is poured out only when the engine is warmed up after a short operation. Then it’s time to remove the fuel tank. Sequentially remove:

  • Fuel supply hose;
  • Air filter;
  • Screen covering the cylinder.

Then remove the crankshaft pulley. Following the pulley, it is required to remove the fan, reflectors, and insulating flywheel casings. Unscrew the cover, removing the rings and coupling housings. When the washer is removed, you can press out the flywheel using a wooden block.

Now, having dealt with the flywheel, remove the cylinder cover, camshaft and pusher. Once the connecting rod is accessed, remove the oil spray and locknut. Having repaired and replaced damaged parts, assemble the engine in the reverse order. You should familiarize yourself with the diagram in advance, then there will be no errors.

Replacement of damaged valves for a gasoline tiller occurs after removal:

  • Gasoline tank;
  • The head of the cylinder block;
  • Carburetor;
  • Silencer;
  • Boxes.

Installation on an elastic band is advisable if a Chinese motor is installed on domestic tillers. Rubber cushions are often used as a platform. Parts of the front shock absorber from a classic car are suitable as them. Along with the need to rearrange individual parts of the tiller engine, many people have a need to install an electric starter themselves. This starter will have to be correctly connected to the battery.

The crown is attached only to the removed flywheels. Pre-remove all interfering parts of the motor. To remove the flywheel, in many cases a special key is indispensable. A generator and its magnets are placed in the flywheel assembly. When the battery terminals and contacts are aligned, test run the tiller.