Motoblock Neva MB-2: engine, operating instructions in PDF (download manual), gearbox diagram, price, owner reviews, tire pressure, speed, fuel consumption, technical characteristics,

Neva MB-2 walk-behind tractors are gaining great popularity among farmers, summer residents and gardeners - small agricultural equipment designed for cultivating various types of soil, from light and loamy soil in personal plots to virgin soil with rocky inclusions. When equipped with mounted and trailed mechanisms, the unit can perform the following work:

milling, loosening and leveling the soil;
harrowing and cultivation;
hilling and digging up root crops;
watering, spraying, pumping water;
crushing and mixing feed and fertilizers;
transportation of goods over short distances;
cleaning the area from debris and snow;
drilling the soil.

Agricultural equipment is produced by the St. Petersburg machine-building state enterprise "Red October". The company's activities are aimed at the mass production of multi-speed walk-behind tractors and walk-behind cultivators with domestic and imported engines from leading foreign companies Subaru, Honda, Briggs & Stratton and the modernization of attachments, which can increase productivity, facilitate the physical work of people and create maximum comfort when using the unit.

Modifications and engine range

Thanks to the search for technological and development solutions to update the range of equipment, the company has released several modifications of walk-behind tractors. The farmer can choose equipment of any power and performance, taking into account the country of origin.

The most common modules are:

Machine MB-2K-7.5. It has a Russian engine with a capacity of 7.5 liters. With. The weight of the unit is 98 kg. The tillage depth is 32 cm. It is characterized by simple controls and comfortable operation.
Module MB-2B-6.0. Equipped with an American 6 HP engine. With. with electric start, has 4 forward and 2 reverse speeds, weight - 98 kg.
MB-2B-6.5. It features a more robust design and a power of 6.5 liters. pp., has improved pneumatic wheels with axle extensions and weighs 94 kg. Tillage depth - 20 cm. Economical, comfortable model with high traction and resource characteristics.
Motoblock Neva MB-2B-6.5 PRO. Equipped with a 6.5 liter Briggs&Stratton petrol engine. With. Cultivation depth - 25 cm, weight - 89 kg. Number of gears: 4 forward and 2 reverse. Designed for long-term work over large areas.
Model MB-Compact-2B-6.5 RS. It is characterized by its low weight - up to 65 kg, shallow plowing depth - up to 20 cm, and is equipped with a wear-resistant 6.5 liter Briggs&Stratton engine. with., additional mechanisms for modifying the walk-behind tractor and the possibility of expanding functionality, also has 2 forward and 1 reverse gears.
MB-2C-6.0 PRO. Equipped with a Japanese EX17D power unit with a capacity of 5.7 liters. With.
MB-2S-7.0 PRO and MB-2S-7.5 PRO are heavy-duty walk-behind tractors with the latest Subaru EX21D carburetor engines with 7.0 and 7.5 hp. respectively. Used for professional work on large areas.

The design of MB-2 walk-behind tractors is arranged according to the scheme of a single-axle pedestrian-riding tractor.

Description of famous models

Among all models of Neva MB walk-behind tractors, several models are in significant demand. They are united by the ability to process up to 25 acres, as well as perform any agricultural operation. Popular models include:

MB-2K;
MB-2B;
MB-23;
MB-2N;
MB-2S.

The main difference between these modifications is the engine that is installed on them.

Technical characteristics of the Neva MB-2 walk-behind tractor

Travel speed at maximum power:
on the second - 6.1 km/h;
reverse speed - 1.4 km/h.
Movement speed when rearranging the V-belt drive belt:
on the second - 12 km/h;
reverse speed - 2.5 km/h.
Transport track:
with axle extensions - 565 mm.
Turning radius - 1.1 m.
Ground clearance - 145 mm.
Operating temperature - -5...+35°С.
The ignition system is electronic non-contact.
The spark plug for the ignition coil is A-11-1, A-17B.
Starting system: manual starter with pull cord.
The running system is wheels in a 2x2 pattern.
Tires - 4x10 model F-106.
Tire pressure is 1.8-2 kg/cm³.

Operating characteristics of the tillage unit:

number of cutters - up to 8;
cutter diameter - 36 cm;
processing depth - 20-32 cm;
maximum working width - 120 cm;
processing speed - up to 0.12 ha/h.

Carburetor

The float-type carburetor of the Neva KMB-5 walk-behind tractor ensures the preparation of the air-fuel mixture, has a vertical mixing chamber arrangement, and is attached with 2 screws to the pipe through gaskets and bolts to the board. Fuel from a fuel tank with a volume of 3.6 liters, when the tap is open, flows by gravity into the device through the connecting hose and fitting, then through the fuel valve into the float chamber, is sprayed, mixed with air in the mixing chamber and approaches the combustion chamber of the cylinder block.

If there is a problem in the power system, adjust the carburetor by turning the screw 1 and 3/4 turns.

Fuel consumption

Fuel consumption for a walk-behind tractor is 1-1.6 l/h.

Dimensions

Overall dimensions of equipment:

Length - 1640 mm;
Width:
with extensions - 850 mm;
with cultivator - 600 mm.
Height with wheels - 1200 mm.

Features of the internal combustion engine

Neva modifications are equipped as follows:

Neva MB-2K is equipped with a domestic DM-1K engine with a long service life and low price.
Neva MB-2B with an American Briggs&Stratton engine of varying power and performance.
Neva MB-2S with professional Japanese installations Robin Subaru or Honda.

The engine on the Neva walk-behind tractor is a 4-stroke, 1-cylinder carburetor with manual start from the starter and air cooling. To transmit rotation to the gearbox or attachment mechanism, a three-groove pulley is used. The operation of the motor is regulated using an air damper.

The devices have an overhead valve arrangement, a horizontal crankshaft position and high torque.

They are characterized by the following features:

hull strength;
modernized air purification system;
manufacturing a crankshaft from forged steel and installing it on bearings on 2 sides;
presence of electronic ignition;
production of sleeves from durable cast iron;
installation of special channels for cooling in the block and head;
use of metal parts instead of plastic;
quick start due to a large bobbin in the starter and reduced compression;
small size and weight.

The most popular are American Briggs & Stratton units. They are characterized by durability, wear resistance and great power. The main disadvantage of engines is their high cost.

Gearbox

The gearbox for the Neva MB-2 walk-behind tractor is a gear-chain device designed to change the rotation speed of the output shaft or cultivators and transmit rotational motion from the driven pulley to the wheels of the walk-behind tractor, changing the speed and direction of movement.

Its performance is ensured by the presence of oil fluid in the housing. Parts are lubricated by spraying oil during disassembly.

The kinematic diagram of the device is simple: a chain and 2 sprockets - upper and lower. The lower, or driven, sprocket is located on the working shaft, due to which the system starts to move. The gear ratio increases the force on the cutters and ensures maximum penetration into the ground.

The transmission serves as a transmitter of energy from the engine to the wheels.

Owner reviews - what they say on the forums

It is important to know what their owners think about MB1 walk-behind tractors. Since this type of equipment is available in several modifications, let's look at reviews for each of them, taken from farming forums.

Oleg - Yaroslavl, RF

"Hello! About a month ago I bought a walk-behind tractor MB1-N MultiAGRO (GP200). I have a small plot, but I’ve been choosing a walk-behind tractor for a long time and still couldn’t decide. There were several criteria for selection. I wanted to buy something reliable, of course. This model suited me both in price and in the availability of spare parts. It was easy to deliver the walk-behind tractor to the site. Now I’m very happy with the purchase, it works flawlessly, now we’ll see how it behaves in winter and spring.”

Sergey - Nikolaev, Ukraine

“I was thinking about what to buy, an MK-200 or an MB-1 with a Briggs Straton engine, which has a headlight. A friend recommended MB1. In general, I bought this beast and I can say that I am satisfied with everything. I don't regret choosing him. It’s powerful, works reliably, I worked on it in the summer and went on vacation with peace of mind. He returned, continued his work without any problems, and dug up the potatoes. Now I've hidden it in the garage until winter. In winter, I plan to clear the snow from the yard on it, and at the same time I’ll check whether it’s convenient to work on it in the evening.”

Mikhail - Khmelnitsky, Ukraine

"Good day. I bought myself a MB1 B MultiAGRO (RS950). I immediately liked the way he maneuvers. It maintains its balance well and does not tip to the side. I plowed 5 acres and also mowed the grass. Of course, you can’t compare it with the previous unit, it was some kind of 90, completely old. By the way, regarding additional equipment: the mower fits perfectly, it is also adjustable in height, it mows with a bang. I recommend this walk-behind tractor to everyone, it’s good equipment!”

You can also help other readers of our site with your reviews on this model, if you are the owner of this walk-behind tractor model, you can leave a review about it, or ask any question you are interested in about this model below in the comments.

Options and attachments

The use of mounted and trailed equipment allows you to expand the functionality of the walk-behind tractor. The following attachments are installed on the Neva MB-2 module:

plows;
hillers;
potato diggers;
seeders;
lugs;
mowers Zarya and Neva;
rotary brushes.

The hiller for the Neva walk-behind tractor processes areas with plants to a depth of 80-120 mm and a width of 250-430 mm.

The walk-behind pump for irrigation has the following parameters:

productivity - 12 m³/h;
suction depth - 5 m;
water supply height - 30 m.

A snow blower is an attachment for removing snow. The productivity of such a unit reaches 250 m³/h, and the working width is 700 mm. When using a blade shovel, the working width is adjusted to 1000 mm.

As trailed implements, a transport trolley is used for the Neva walk-behind tractor with a load capacity of 150-250 kg.

Hitch

A hitch is a device with which attachments are attached to a walk-behind tractor. Its use makes it easier to work with a plow, hiller and other tools, and ensures a reliable connection.

The devices are U-shaped and can withstand heavy loads.

Milling cutters

The complete set of the walk-behind tractor includes additional cutters in the amount of 6-8 pieces to increase the soil coverage width in 1 pass.

The number of installed cutters depends on the engine power and the purpose of the module.

DIY lug wheels

Today, the best option would be to use one of several options:

Made from old disks. In this case, it is enough to take standard, previously used car wheels as a base. You also need to find a working supported axle and weld steel plates to the edge. The size should optimally fit the disks. This is due to the fact that in the future a lug is attached to them. The connection is made using bolts, and the edges of the plates should not come into contact with the rim in any way. The main structural element is the grouser plates. The optimal solution would be to make them from old corners. To do this, it is enough to cut the required parts with a grinder, and then weld them to the rim at intervals of every 15 cm.
Made from a cylinder. The method does not entail any difficulties. It is enough to find a used gas cylinder and cut out circles with a diameter of 30 cm and a width of 6 cm from it. Further actions are carried out according to the principle of the first option.

Everyone has the right to choose the most optimal option for themselves, based on the presence of certain elements.

Operating instructions for walk-behind tractors Neva MB-2

According to the operating instructions, before turning on the walk-behind tractor, it is necessary to carry out preparatory work:

check all components and fastening connections for tightness and reliability;
familiarize yourself with the safety measures described in the manual;
check the engine oil level;
fill the fuel tank with pure gasoline AI-95 or AI-92;
re-preserve the walk-behind tractor;
check the presence of oil in the gearbox;
inspect the tires.

Run-in

Running in is an important stage in the operation of any equipment. If the process is carried out incorrectly and the walk-behind tractor is not properly maintained, its service life is reduced and the mechanisms become faulty.

Running in is carried out in light mode for 30 hours to grind in all parts.

The depth of soil cultivation reaches no more than 10 cm. Experts recommend carrying out this process without loads.

After break-in, you must perform the following steps:

make the first oil change;
check the strength of fastening connections;
adjust the belt for the walk-behind tractor;
check the operation of the left wheel release;
remove additional restrictive gaskets between the carburetor outlet flange and the pipe flange.

Cultivation

When operating a walk-behind tractor with a cultivator, you must adhere to the following algorithm:

Place the equipment in a horizontal position and check the steering.
Adjust the tillage limiter to the desired depth.
Carry out cultivation with the carburetor throttle valve half closed.
When working in low temperatures, if the walk-behind tractor does not start, use the following method:
Fill the engine with oil with a temperature of + 50…60°C;
warm up the carburetor pipe and the system itself by placing a rag soaked in hot water on them.

Another modern horizontal shaft cultivator

The specific manufacturer of the cultivator does not play any role. They will all have a copy of the Honda engine, and all such cultivators are either made in China or from Chinese components.

And since this is a standardized production, it will be easy to select an engine for such a cultivator:

You need to measure the shaft diameter on the old engine . There will be either 19.05 or 20 mm, most likely 19.05 mm.
Follow the link and see an engine up to 8 hp with a similar shaft diameter (19.05 or 20 mm).
If you previously had an engine with a 19.05 mm shaft, but you want to buy an engine with a 20 mm shaft, then you can simply bore the old pulley to 20 mm.

Answers to common questions:

Will the new engine fit on the same mounts? Yes
I used to have a 3-5 hp engine, can I install the same one? Engines of 3, 4 and 5 hp exist in nature, but are non-standard. And therefore they will cost more than the widely used 6.5 horsepower engines. Better take 6.5 hp.

Advantages and disadvantages

Advantages of MB-2 walk-behind tractors:

simple operation and maintenance;
increased efficiency and service life;
operation at low ambient temperatures;
choosing the optimal speed;
wide range of mounted implements;
reliability and strength of components;
convenient transportation;
economical fuel consumption.

Disadvantages of MB-2 modules:

Light-weight models have little pressure on the ground, so they work poorly.
Heavy equipment weighs 98 kg, making it difficult to operate.
Unstable on uneven surfaces, possible tipping over.

Motoblock Neva (with foreign engine)

Previously, Neva walk-behind tractors were equipped with Russian engines, but about 10 years ago the Red October plant switched entirely to foreign engines - Lifan, Subaru, Briggs & Stratton, Kasei.

To replace a modern engine on a Neva walk-behind tractor you need:

If you had an engine with a 19.05 mm shaft, and you want to take a new one with a 20 mm shaft or vice versa, then:

Take a new engine with the required shaft
Buy a new pulley to fit the shaft size of the new engine (pulley 19.05 mm, pulley 20 mm)

Also, buying a new pulley is a good option if it is not possible to measure the shaft diameter on the old engine.

Answers to common questions:

Will the mounts from the old engine work? Yes, they will fit
My engine was weak, I want to install a more powerful one. If you want a simple option without modifications, then it is best to take the Lifan 170F-T (8 l) - this is the most powerful Lifan engine with a 20 mm shaft.
I had a weak engine, I want to install a much more powerful engine (13 hp, for example). In this case, in addition to buying a new pulley, you will also have to redo the engine seat. The task is not very simple, and the gearbox will receive loads for which it was not designed.

Modern walk-behind tractors with belt drive

In order to select an engine for a modern walk-behind tractor with a chain drive, you need:

Measure the shaft diameter on an old engine (it will be either 19.05 or 20 mm, less often - 25 mm on 9 horsepower engines)
Select a new motor with the same shaft size as the old motor

If you had an engine with a 19.05 mm shaft, and you want to take a new one with a 20 mm shaft or vice versa, then:

Take a new engine with the required shaft
Buy a new pulley to fit the shaft size of the new engine (pulley 19.05 mm, pulley 20 mm)

Also, buying a new pulley is a good option if it is not possible to measure the shaft diameter on the old engine.

Answers to common questions:

Will the mounts from the old engine work? Yes, they will fit
My engine was weak, I want to install a more powerful one. If you want a simple option without modifications, then it is best to take the Lifan 170F-T (8 l) - this is the most powerful Lifan engine with a 20 mm shaft.
I had a weak engine, I want to install a much more powerful engine (13 hp, for example). In this case, in addition to buying a new pulley, you will also have to redo the engine seat. The task is not very simple, and the gearbox will receive loads for which it was not designed.