This is the new upgraded rear induction version engine.

PERFORMANCE:
Output Power: 3.7HP at 8500rpm
Idle Speed: 1600 rpm
Static Thrust: 8.5kg at 100 meters altitude; 7.5kg at 1800 meters
Recommended prop size: 18x8, 18x10, 19x8, 20x8
Type of the sparking plug: NGK CM6
Exhaust Amount : 30.5cc
Bore and Stroke: 36mm×30mm
Compression Ratio: 7.6:1
Ratio of lubricating capacity: 30:1
Carburetor: Tillotson

Weight: Main Engine - 910g Exhaust pipe - 60g Ignition - 120g

Spare part codes:

Requirements
Fuel: 2C Regular Gas mixed 30:1 (petroleum based for break in, synthetic thereafter)
Propeller: 18x8, 18x10, 19x8, 20x8；
Ignition Battery:4.8 to 6.0 Volts >=1200Mah
Replacement Spark plug: NGK CM6 or equivalent
Gap: 0.018" to 0.020"
Installation torque:7 to 8 ft-lbs.

Includes:
1 x Engine with accessories.
1 x English/Chinese manual.

Please explain:
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