3I 70CC B2 2-Cylinder engines with Starter
Including ESC （Electronic Speed Controller）
Parameter
| Type | 2 cycle piston valve type gasoline engine for airplane |
|---|---|
| Displacement (cc) | 70cc(4.27 cu.in) |
| Bore x Stroke (mm) | 1.53 in(39mm) x 1.18 in (30mm) |
| Recommended props | 22×10, 23×8, 23×10,24X8,24X9 |
| Maximum Output | 7.9HP/8600rpm |
| Power supply | 7.4V-14V |
- Carburetor : Walbro
- Ignition : 3I DC-CDI (Computer Controlled auto advance, electronic ignition system)
- SPARK PLUG: NGK CM6 Type
- Requires: Gasoline, 2-cycle oil, ignition battery & propeller
- speed rang : 1500-8600rpm
- Gasoline-Version : Pre-mixed Fuel, 25-40 (Gasoline):1 (recommended : 32:1 for real oil, or 40:1 for synthetic oil)
- Lubrication Oil : High quality fully synthetic 2 cylinder oil such as Motul 800 2T 100% synthetic racing motro oil , Red line two-stroke racing motor oil , Stihl Ultra high performance 2 cycle fully synthetic engine oil etc .
- Break in Propeller : 23X10 (Standard Two leafs prop)
- Cooling System : Air Cooled
- 3I Engine package Includes: electronic CDI ignition, muffler, spark plug, gaskets, bolts, throttle arm extension & manual.
Weight:
- Engine: 3.32 lb (1508g)
- 2XMuffler: 5.36 oz (152 g)
- Ignition Module: 5.1 oz (145 g)
- Total: Weight: 3.98 lb (1805 g)
Technical Data:
- Ignition Battery: 7.4V-14VNiCd or NiMH, 7.4V LiFe or 2S LiPo pack ( DO NOT use BEC, iBEC or uBEC)
- Gasoline/Oil Mix: (recommended : 32:1 for real oil, or 40:1 for synthetic oil)
- Replacement Spark Plug: NGK CM6 or equivalent
- Idle Speed: 1500 rpm/min
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Here’s an English review you could use:
> “This 3i 70 cc B2 twin-cylinder engine with starter delivers impressive performance right out of the box — smooth operation, solid build quality, and easy installation made it a standout for my project. A reliable choice for anyone looking for power and convenience in one package.”