This flow-chart section is gold. It guides you through:
The 162FMJ engine is a masterpiece of utilitarian engineering. It is not sophisticated, but it is precise. Every bolt has a torque. Every gap has a tolerance. Every oil change interval has a reason.
The 162FMJ Engine Service Manual is not a suggestion; it is the difference between an engine that runs for 50,000 miles and one that throws a rod at 10,000. Whether you are tuning a pit bike, restoring a farm ATV, or building a generator, invest one hour to download, read, and bookmark the manual.
Your engine will reward you with a lifetime of steady, thumping reliability. Don’t guess—torque it by the book.
Further Reading:
Disclaimer: Always refer to the specific manual for your engine's serial number. Variations exist between manufacturers.
The 162FMJ (often referred to as a CG150 derivative) is a ubiquitous 149cc–150cc, 4-stroke, air-cooled, single-cylinder engine widely used in Chinese motorcycles, pit bikes, ATVs, and small utility vehicles. Known for its vertical orientation (offering better cooling and power) and reliable pushrod design, it is a popular, cost-effective engine.
This service manual guide covers the essential technical specifications, maintenance, and repair procedures derived from typical 162FMJ documentation. I. Technical Specifications (162FMJ / CG150)
Engine Type: Single-cylinder, 4-stroke, Air-cooled, Vertical, Pushrod. Displacement: 149.4 cm³ – 150cc. Bore x Stroke:
Compression Ratio: 9.0:1 or 9.2:1 (depends on manufacturer). Max Power: Approximately Max Torque:
Lubrication: Pressure/Splash lubrication (Internal & External Rotor Pump). Oil Capacity: (typical). Starter: Electric and Kick Starter. Gearbox: 5-Speed Manual (1-N-2-3-4-5). Carburetor: PZ27. II. Essential Maintenance Schedule
Regular maintenance is crucial for the longevity of pushrod engines.
Engine Oil: Change every 1,000–2,000 km (initially, then every 2,000-3,000 km thereafter). Use 15W/40-SE or 10W-40 4T motorcycle oil. Valve Clearance: Check/adjust every 2,000–3,000 km.
Spark Plug: Inspect/clean every 3,000 km (Type: D8TC or NGK D8RTC). 162fmj Engine Service Manual
Air Filter: Clean every 1,000 km, replace as needed (Foam type). Oil Strainer/Filter: Clean during each oil change. III. Service Procedures and Adjustments 1. Valve Clearance Adjustment (Crucial) Clearance Spec: Method: Ensure the engine is cold.
Remove the valve covers and the ignition timing plug on the left cover.
Rotate the flywheel counterclockwise to "T" (Top Dead Center) on the compression stroke. Both rockers should have play.
Use a feeler gauge to measure; adjust using a 9mm wrench and screwdriver until slight drag is felt. 2. Engine Oil Change
Run the engine for 2–3 minutes to warm the oil, then shut it off.
Remove the filler cap, then remove the drain plug (usually located at the bottom right).
Clean the oil strainer screen and spring to remove metal debris.
Reinstall the strainer, spring, and plug (torque gently, do not overtighten). of 10W-40 4T motorcycle oil. 3. Carburetor Adjustment (PZ27) Idle Speed:
Idle Mixture Screw: Turn clockwise until closed (do not force), then turn back 1.5–2.5 turns. IV. Trouble Shooting Guide
Engine Overheating: Inspect cooling fins, check for lean fuel mixture (white spark plug), or improper oil level.
Excessive Noise (Tappets): Valve clearance is too loose. Re-adjust.
No Power / Hard Starting: Valve clearance is too tight. Check compression and spark plug.
Clutch Slippage: Check clutch cable tension (10–20mm free play). If adjusted correctly, replace friction plates. V. Key Tips for 162FMJ Service This flow-chart section is gold
TDC Position: Ensure you are at top dead center compression stroke, not exhaust stroke, or the valves will be too tight, causing damage.
Gaskets: Always replace paper gaskets during major disassembly (cylinder head, clutch cover) to avoid oil leaks.
Bolts: Tighten engine cover bolts in a cross-pattern to avoid cracking the aluminum.
Disclaimer: Specifications and maintenance procedures can vary slightly depending on the specific manufacturer of the bike (e.g., Zongshen, Lifan, Shineray). Always verify with the provided manual for your specific vehicle.
However, accessing specific service manuals can sometimes be challenging without the correct sources or permissions. Here are some general steps and resources you might find helpful in obtaining or accessing the service manual for your 162FMJ engine:
If you have any more details about the application of the 162FMJ engine or your specific needs, I might be able to offer more targeted advice.
The 162FMJ is a widely utilized 150cc single-cylinder, air-cooled, 4-stroke engine. Often referred to as the CG150 or CGT150, it is based on the legacy Honda CG architecture and is frequently manufactured by brands like Zongshen, Lifan, and Shineray for motorcycles, dirt bikes, and ATVs. Core Specifications & Technical Data
Standard service manuals for the 162FMJ highlight several critical technical parameters: Displacement: Approximately 149.4cc – 149.5cc.
Engine Architecture: Single-cylinder, OHV (Overhead Valve), canted at 15 degrees. Bore and Stroke: 62.0mm x 49.5mm.
Compression Ratio: Typically 9.0:1 to 9.6:1, though some performance variants reach 10.3:1.
Maximum Power: 8.2kW to 10kW (approx. 11–13.6 PS) at 8500–9500 RPM. Ignition Type: CDI (Capacitor Discharge Ignition).
Clutch & Gearbox: Manual wet multi-plate clutch with a 5-speed constant mesh transmission (1-N-2-3-4-5). Service & Maintenance Schedule
Following the Honda CG150 Titan Service Manual guidelines is standard practice for this engine model. Further Reading:
Oil Capacity & Grade: Uses roughly 1100mL of 15W/40-SE or 10W-40 4-stroke engine oil.
Oil Change Procedure: Drain from the left-side bottom plug; clean the reusable oil screen located behind the large cap on the right bottom.
Valve Clearance: Intake and exhaust valves should be set to 0.05mm to 0.08mm (cold).
Idle Speed: Standard setting is 1400 ± 100 RPM or 1500 ± 150 RPM. Spark Plug: Typically uses a D8TC plug. Primary Components & Assemblies
Manuals generally divide the engine into specific functional groups for troubleshooting: Service manual part engine For CG-125/150
The 162FMJ engine is a staple in the world of 150cc motorcycles, pit bikes, and light utility vehicles. Often manufactured by brands like Zongshen, Lifan, and Shineray, this air-cooled, four-stroke, single-cylinder engine is prized for its simple overhead valve (OHV) design and remarkable durability.
This service manual guide outlines the essential specifications, maintenance schedules, and adjustment procedures required to keep a 162FMJ engine running at peak performance. 1. 162FMJ Engine Specifications
Understanding the core technical data is the first step in proper service. While variants exist, most standard 162FMJ engines follow these parameters: Type: 4-Stroke, Single-Cylinder, Air-Cooled, OHV. Displacement: ~149.4cc. Bore x Stroke: 62.0 mm x 49.5 mm. Compression Ratio: 9.0:1 (suitable for 92+ octane fuel). Max Power: ~8.5 kW @ 8,500 RPM (approx. 11.4 hp). Max Torque: ~10.5 Nm @ 7,500 RPM. Ignition: CDI (Capacitor Discharge Ignition). Transmission: 5-speed manual (usually 1-N-2-3-4-5). Spark Plug: D8TC or equivalent (Gap: 0.6–0.7 mm). 2. Maintenance Schedule
Regular service intervals are critical for preventing premature wear on air-cooled engines, which run hotter than liquid-cooled counterparts. Action Required Every 500 km Check and adjust drive chain tension; lubricate. Every 1,000 km
Oil Change: Drain and refill (more often in dusty/severe conditions). Every 1,500 km Inspect and clean air filter (replace if paper-type). Every 3,000 km Valve Clearance Check: Inspect and adjust tappets. Every 5,000 km Inspect/replace spark plug and check fuel lines. 3. Lubrication & Oil Change
The 162FMJ uses a wet sump lubrication system. Because it lacks a traditional external oil filter in most versions (often using only an internal mesh screen), frequent oil changes are vital to remove contaminants. 162FMJ Motorcycle Engines - High Performance & Durability
Many backyard mechanics argue, “It’s just a Honda clone; use a CG200 manual.” While the 162FMJ is derived from the Honda CG engine architecture, the Chinese manufacturing tolerances, bolt grades, and oil passage designs differ significantly.
Detailed diagrams of the OHV rocker arm assembly. This section shows you how to remove carbon deposits from the combustion chamber without damaging the 62mm bore cylinder walls.