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Strictly prohibited to block the piston/crankshaft by tool. Use propeller hub clamping.
Use only 3W mufflers and 3W ignitions for proper operation.
Read manual before use. Ensure proper setup for safe operation and warranty.
The manufacturer is not responsible for damage or injury from product usage.
Mount engine on a quadrilateral motor box for good airflow and stiffness.
Ensure tension-free mounting on a flat surface to avoid crank case distortion.
Avoid direct mounting with spacers or on wide formers to prevent distortion.
Ensure adequate air intake and exhaust for cooling cylinder and muffler.
Deflecting air (baffling) is recommended for optimal cooling of cylinders.
Use a thermo element to monitor CHT. Optimum range 180-220℃, max 270℃.
Spark plug color indicates temp; low temps cause carbon buildup and damage.
Install an air scoop for rear carburetors; seal fuselage interior for fuel proofing.
Avoid placing ignition module in path of hot air to prevent malfunction.
Red cable is positive. Timing set at factory. Ensure sensor/magnet coordination.
Use a flexible support bracket at the canister's center of gravity for mounting.
Install compartments and holes for airflow over canisters and exit through fuselage.
Use only approved propeller brands and sizes for your engine.
Ensure blades match in length/shape and check for flatness.
Drill propellers with a drill press from the rear. Use a drill guide for accuracy.
Balancing your propeller is critical for engine health; always keep it balanced.
All persons must stay behind the line of the rotating propeller when the engine is running.
Set highspeed needle H and low speed needle L to 1 turn as starting points.
Use metal or carbon fiber pushrods for consistent RPM, especially at idle.
Use ashless 2-stroke oil, 32-1 or 30-1 mixture, and high octane unleaded fuel.
Break-in on test stand for 1 hour, avoid full throttle. Alternative: 2000-2500 RPM for 4 hours.
Use synthetic oil and high octane fuel; full break-in is 12-20 hours.
Maintain 4" separation between ignition system and receiver/battery/switch.
Protect cables, remove cap by hand, use 3W switches.
Use quality throttle servo, correct fuel tank filling and line modification.
Follow manual, use authorized parts, avoid fuel splash, secure aircraft.
Avoid imbalance, drilling errors, loose bolts; use rubber stick for starting.
Never tune running engine. Ensure proper muffler/ignition systems.
Warranty is void if unauthorized modifications are made to the engine.
Check propeller bolts, spinner, damage, and throttle position.
Verify batteries, servos, ignition switch, linkages, wheels, wing, canopy.
At least one person must hold the model securely during engine starting.
Use rubber stick, check batteries/ignition/transmitter, anchor plane.
Choke, ignition, initial pop, choke adjustment, re-ignite, start, warm-up.
Avoid abruptly opening the throttle due to high power and torque.
Use tachometer; tune high needle for max power, then richen slightly.
Check idle stability; adjust low needle if RPM drops.
Verify smooth throttle transition. Optimal tuning has slight richness on cold start.
If engine is flooded, remove spark plug and drain fuel from crankshaft housing.
Check low needle leaness, carburetor cleanliness, or ignition for this issue.
Check propeller balance, ignition timing, leaks, spark plug, and motor mount rigidity.
Check carb settings, propeller size, muffler, overheating, timing, and fuel mix.
Cylinder capacity for 55Xi and 55Xi CS models.
Power output in HP and kW for 55Xi and 55Xi CS models.
Bore diameter for 55Xi and 55Xi CS models.
Stroke length for 55Xi and 55Xi CS models.
Operating speed range in RPM for the engines.
Weight of the engines, including ignition.
Crankshaft configuration: 3 Ball bearings.
Connection rod type: Needle bearings on both ends.
Recommended fuel mixture: 1:50 / 2% Mix, full synthetic oil, high octane fuel.
IIS Ignition voltage requirement: 6.0 V - 8.4 V.
Recommended 2-bladed propeller sizes.
Recommended 3-bladed propeller sizes.
Diagram showing the mounting bolt pattern and dimensions for engine installation.
36 month or 1200 operating hours warranty for defective parts from material/manufacturing.
Warranty excludes defects from misuse, mishandling, unsuitable parts, or unskilled repairs.
Warranty claims require presentation of the repair order and purchase certificate.
Guarantee is valid only with the official shop receipt and presentation of this document.
Warranty is void if unauthorized modifications are made to the engine.
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