This document is an instruction manual for a 212cc gasoline engine, specifically the 210F(D)S model, manufactured by CERTIFIED. It provides comprehensive information on the engine's operation, maintenance, and safety.

Function Description:

The 212cc engine is a single-cylinder, 4-stroke, forced air-cooled, OHV25° gasoline engine designed to power various equipment, particularly snow blowers. It is capable of both electric and manual starting. The engine's primary function is to convert the chemical energy of gasoline into mechanical energy to drive machinery.

Important Technical Specifications:

Model: 210F(D)S
Type: Single cylinder, 4-Stroke, Forced Air Cooling, OHV25°
Net Power (kW/3600rpm): 4.4 kW
Net Torque (N·m/rpm): 12.5 N·m at 2500 rpm
Fuel Consumption (g/kW·h): <395
Oil Consumption (g/kW·h): <6.8
Oil Capacity (L): 0.6 L (20 fl.oz)
Gas Oil Capacity (L): 2.5 L
Speed Fluctuating Ratio: <10%
Noise: <70 dBA
Bore x Stroke (mm): 70 x 55 mm
Displacement (cc): 212 cc
Compression Ratio: 8.5:1
Lubricating Mode: Splash
Starting Mode: Recoil start (manual) / Electric starting (120V)
P.T.O shaft rotation: Anti-clockwise (from P.T.O. side)
Valve Clearance: Input valve: 0.10–0.15 mm (cold), Output valve: 0.15–0.20 mm (cold)
Spark Plug Clearance: 0.7–0.8 mm (0.028–0.031 in)
Igniting Mode: Transistorized magneto Ignition
Air Cleaner: No filter (as listed in specifications, though typically engines have some form of air filtration)

Usage Features:

The engine incorporates several controls for safe and efficient operation:

Engine Switch: Enables and disables the ignition system. It must be in the "IN-ON" position for the engine to run and "OUT-OFF" to stop.
Knob Fuel Switch: Controls the fuel flow between the fuel tank and the carburetor. It should be in the "ON" position for operation and "OFF" when not in use to prevent flooding and leakage.
Choke Lever: Used for starting the engine. The "CLOSE" position enriches the fuel mixture for cold starts, while "OPEN" provides the correct mixture for operation and warm restarts.
Priming Pump: Supplies additional fuel to the carburetor in low temperatures, recommended to be pressed no more than three times for cold starts. Not needed for hot starts.
Recoil Starter Grip: For manual starting, pull briskly after feeling resistance.
Starter Motor (Electric Start): For electric starting, plug into a 120V electrical source and press the starter button. The manual warns against running the electric starter for more than 10 times at 5-second intervals, with 5 seconds off, to prevent damage.
Operating Temperature: Recommended for use in snow blowers between -30°C to 4.4°C. Operation outside this range may affect starting and normal function.

Maintenance Features:

The manual emphasizes the importance of regular maintenance for safe, economical, and trouble-free operation, as well as to reduce air pollution.

Pre-operation Checks: Before each use, inspect for oil or gasoline leaks, remove dirt/debris, check for damage, ensure shields/covers are in place, and tighten nuts/bolts/screws. Crucially, check engine oil and fuel levels.
Maintenance Schedule: A detailed schedule is provided, with intervals for various tasks:
- Engine Oil: Check level (each use), Change (every month or 20 Hrs). Recommended oil is SAE 5W-30 or 0W-30/40, API SERVICE Category SF or higher.
- Sediment Cup: Clean (every 3 months or 50 Hrs).
- Spark Plug: Check-Clean (every 3 months or 50 Hrs), Replace (every 6 months or 100 Hrs). Recommended spark plug is F7RTC or equivalents, with a gap of 0.028-0.031 in (0.70-0.80 mm).
- Spark Arrester (optional parts): Clean (every 6 months or 100 Hrs).
- Valve Clearance: Check-Adjust (every year or 150 Hrs).
- Fuel Tank and Strainer: Clean (every year or 150 Hrs).
- Combustion Chamber: Clean (After every 150 Hrs).
- Fuel Line: Check (Every 2 years, replace if necessary).
Refueling: Use unleaded gasoline with a pump octane rating of 87 or higher. Ethanol gasoline can also be used. Avoid stale or contaminated fuel. Refuel outdoors in a well-ventilated area with the engine stopped and cooled. Do not overfill.
Oil Change Procedure: Drain used oil when warm, then refill to the outer edge of the oil filler hole with recommended oil.
Storage Preparation:
- Cleaning: Clean exterior surfaces after the engine cools. Avoid using a garden hose or pressure washer directly on the engine to prevent water ingress.
- Fuel Management:
  - Fuel Stabilizer: Add stabilizer to a full tank of fresh gasoline and run the engine for 10 minutes to circulate the treated fuel.
  - Draining Fuel: Alternatively, drain the fuel tank and carburetor completely by removing the carburetor drain bolt and fuel tube.
- Engine Internal Protection: Remove spark plugs, pour 5-10 cc of clean engine oil into the cylinder, pull the starter rope several times to distribute the oil, then reinstall spark plugs. Pull the starter rope slowly until resistance is felt to close valves.
- Battery Maintenance (for electric start): Recharge the battery monthly during storage.
- Storage Environment: Store in a well-ventilated area, away from flames, sparks, and high humidity. Cover with a nonporous cover after cooling.
Emission Control: The engine's design aims to reduce carbon monoxide, nitrogen oxides, and hydrocarbons. Tampering with the emission control system is prohibited.
Replacement Parts: Use genuine parts for maintenance to ensure proper emission control and performance.

The manual also includes a troubleshooting guide for common issues like the engine not starting or lacking power, providing possible causes and corrections. Wiring diagrams for the 120V electric starter and general circuit are also included.

CERTIFIED 212cc - Stopping the Engine; Maintenance Overview; Importance of Regular Maintenance; Maintenance Safety Guidelines