Review and specifications of the outboard motor Zongshen 9.9

In the world of budget water-motor technology, Chinese manufacturers have long ceased to be synonymous with low quality, becoming serious competitors for eminent brands. Zongshen 9.9 outboard motor It is a prime example of how affordable prices can be combined with reasonable reliability for recreational fishing and recreation, often chosen by owners of small PVC boats and light aluminum “kazak”, which do not require high speed, but critical economy.

Many users confuse 9.9 and 9.8 hp models, believing that they are the same, but Zongshen has its own nuances in labeling and design. In this review, we will examine in detail what lies beneath the plastic casing, whether to trust this “Chinese” and how to extend the life of the engine, which is often called the popular choice. technical specifications It will help you make a good decision before buying.

It is worth noting that the market is full of modifications, so it is important to distinguish between original builds and outright fakes that copy the design. Zongshen It is positioning its 9.9-horsepower engines as a universal solution, but is this really true in practice?

Specifications and engine design

At the heart of the unit is a two-stroke single-cylinder internal combustion engine, and despite its simplicity, engineers have managed to achieve decent performance at a relatively low weight. Workload The cylinder is usually about 169 cubic centimeters, which is standard for a class of 9-10 hp This provides enough traction to exit the planing of a small boat with one to two passengers.

The ignition system here is electronic (CDI), which saves the owner from the need to constantly monitor the condition of the candles and gaps in the interrupter, as it was on the old engines with magdinos. carburetor in the basic configuration, as a rule, membrane type, which allows the motor to work at different angles of inclination, although it requires a high-quality mixture.

Cooling is done by forced off-shore water through an integrated pump, which is an efficient system, but it imposes certain cleanliness requirements. Transmission has three positions: neutral, front and reverse, switching is carried out manually through a ramper or cable traction (depending on the configuration).

• 🚤 Engine type: Two-stroke, single-cylinder with forced air cooling (for cylinder) and water (for head).
• ⚙️ Start system: Manual (traction starter), there are modifications with an electric starter, but they are rare in this class.
• 🛢️ Mixing: Float carburetor, requires the preparation of a gasoline oil mixture.
• ⚓ Transmission ratio: Standard for class 2.08:1, which provides a balance between thrust and speed.

⚠️ Warning: Unlike the four-stroke engine, this engine requires strict adherence to the ratios of mixing gasoline and oil, and the use of pure gasoline is guaranteed to disable the piston group in a few minutes of operation.

Fuel consumption and environmental aspects

One of the main issues that would-be buyers are concerned about is the appetite of the engine, and the two-stroke design means that some of the fuel mixture is simply released into the atmosphere through the exhaust window without completely burning. fuel For the Zongshen 9.9, it's about 2.5 to 3 liters per hour at full speed, and for the low speeds used for trolling, the consumption drops to 1 to 1.5 liters.

This makes the engine quite economical for long exits, if you do not abuse the maximum gas, but it is worth considering that the actual flow depends on the propeller, the weight of the boat and the condition of the bottom. Environmental friendliness Two-strokes are traditionally lower than four-stroke counterparts, due to the presence of oil in the exhaust and unburned hydrocarbons.

For fishermen who spend a lot of time in trolling mode, stability at low revs is an important aspect. Here, the Zongshen 9.9 performs well, but requires a good idling setting. If the screw is chosen incorrectly, the engine can stall or operate unstable.

In reality, when loading the boat with equipment and passengers, mix-up It could go up 15-20%.

Reliability of construction and materials

When it comes to Chinese technology, the word "reliability" is a skeptic, but Zongshen is a large industrial concern that produces engines not only for boats, but also for motorcycles and generators. Carter. The engine is made of aluminum alloy, which provides good heat sink and protection against corrosion, provided proper painting and care.

The plastic casing is made of a high impact material that holds impacts well, but can become brittle in the cold, and the interior is dense enough to make it difficult to access some of the sites for maintenance without removing the lid. Exhaust system It is implemented through the lower unit, which reduces the noise level characteristic of two-strokes.

The low-end models often save on metal thickness or corrosion-resistant coating. The Zongshen 9.9 uses a standard scheme, but owners are advised to regularly check for lubrication in the gearbox and the condition of the osteoils. The propeller It is usually aluminum, a three-bladed one that bends when hitting a stone, protecting lower unit from more serious damage.

Preparation and breaking in

Proper running is the foundation of a long life for any engine, and the Zongshen 9.9 is no exception. Many beginners make the mistake of giving full gas immediately after purchase, which leads to overheating and bullying of the piston group. break-in It takes about 10 hours or two full tanks of the mixture.

In the first hour of operation, it is recommended to operate the engine at speeds below 50% of the maximum. Do not keep the gas handle in one position for too long - periodically change the modes of operation, giving the engine "breathe". Fuel mixture It must be prepared immediately before refueling using quality oil for two-stroke engines labeled TC-W3.

After each foray into the water, especially if you have been fishing in salt water or contaminated water, the motor should be washed with fresh water, which will help prevent corrosion of the cooling system and external elements, and remember to drain the water from the pump after the fishing trip, if you plan to store the engine for a long time.

⚠️ Warning: Never keep a full tank of gasoline indoors, fuel vapors can create an explosive situation, and the gasoline itself loses its properties over time and clogs the carburetor.

Typical malfunctions and methods of their elimination

Like any other appliance, the Zongshen 9.9 can be a hassle, especially if you don't follow maintenance rules. The most common problem is launch problems. spark-plug Native candles are often recommended to be replaced with better-quality analogues (such as NGK) after the first 10 hours of operation.

The second common problem is that the water cooling system fails, and the pump wing is made of rubber, and over time it wears out or tans, and if you notice that the control stream has become weaker or has disappeared, you need to immediately shut down the engine, otherwise you need to turn off the engine immediately. overheating secured.

And the owners are also facing a leak in the diewood oil oil oils, and this is manifested by the appearance of an emulsion in the gearbox, and replacing the oil oil oils requires special tenants and skills, so you should trust the service center to do this. carburetor can be clogged with dirt from the tank, so the installation of an additional fuel filter fine cleaning will not be superfluous.

To diagnose malfunctions, it is useful to have a simple set of tools and a spare candle on hand. The ability to quickly remove and clean a carburetor or replace a fuel hose in the field can save your fishing.

Comparison with competitors and final conclusions

In the 9.9 hp market, Zongshen competes with brands such as Hidea, Sea-Pro, Tohatsu and Yamaha. Compared to the Japanese originals (Tohatsu/Mercury), the Chinese engine loses in resource and build quality, but wins in price almost twice. Hidea 9.8 They are a direct clone, and often they are assembled in the same factories, differing only by nameplates.

Compared to Sea-Pro, Zongshen is often a little easier to maintain due to more affordable parts. However, if you need a technique for commercial use or frequent long-distance hikes, it is better to consider more expensive ones. four-stroke options or brands from the top three of the world ranking.

On the dry side, the Zongshen 9.9 is a great choice for a summer dweller, amateur fisherman or hunter who needs an inexpensive, lightweight and maintainable motor. It does not require you to have an engineering education to maintain, but it will require love and regular attention.

⚠️ Note: When buying, pay attention to the production date. Motors that are stored in a warehouse for a long time without canning can have problems with rubber carburetor seals, which dry up over time.

Frequently Asked Questions (FAQ)