SOLO Aircraft Engine 2625 02 i View larger

SOLO® Aircraft Engine 2625 02 i

Description of construction

  •   Twin-cylinder inline two-stroke engine
  •   Liquid cooling
  •   Lubrication by fuel-oil mixture
  •   Electronic fuel injection
  •   Dual electronic high-voltage ignition
  •   Redundancy system
  •   Crankshaft layout for belt transmission
  •   AC generator

Operational data and limitations

Take-off-speed, power6,600 1/min. at a power of 50 kW (68 HP)
Max cont. speed, power6,600 1/min. at a power of 50 kW (68 HP)
Max rpm6,700 1/min
Cut off speed by CPU6,700 1/min.
Idle rpmapprox. 2,300 1/min
Max temp. cooling liquid115 °C (240°F) measured in the cylinder - head
Fuel consumptionMax. continous power approx. 6.47 US gal./hr. (24.5 l/hr.)
Engine Displacement625 ccm, cyl. bore 76 mm, stroke 69 mm
Compression Ratio9,5 : 1
Ignition UnitElectronic, two butterfly shutters, mapped
Ignition PlugsBOSCH W5 AC Gap at electrodes 0.5 mm
Direction of rotationClockwise, seen in direction of flight
Fuel2-Stroke mix, AVGAS 100LL, premium gas (min. 95 ROZ)
MixtureMixture ratio 1 : 50 , 2-stroke Castrol mineral oil or synthetic oil, or other oils with specification according to JASO FC oder FD
Dry Weightapprox. 24 kg without exhaust (according to airframe manufacturer)
Generator12 V, 500 W
Fuel injectionElectronic, two butterfly shutters, mapped
CoolantEngine coolant (Glysantin BASF G48), tab water (0-20°dh) in a mixture of 40:60 (27°C)


EASA AD 214-0269 (11.12.14) Change of the redundancy system

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Service manual all 2625

German version, ed- 5 (10.12.18)

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Service manual all 2625

English version, ed. 5 (10.12.18)

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TM 4600-3

Subjekt Change of the engine 2 625 02 from the version with carburettors to the version with electronic engine management for fuel injection and ignition. Change of the type to 2 625 02 i with new serial number consisting of the present number plus the number of the changed engine.

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TM 4600-5

Change of the redundancy system (12.12.14)

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TM 4600 – 6

SOLO 262502i with electronic fuel injection Subjekt Change of the ignition mapping

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Summary Fuel and Oil

Summary Fuel and Oil for SOLO Aircraft Engines

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TM 4600-8

a) Change of the material of the connecting strips from Aluminium to CFK-composite. b) Alternative use of a different throttle position sensor.

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TM 4600-9.pdf

Introduction of a new throttle body assembly for SOLO 262501i and SOLO 262502i

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Software ""

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Airworthiness Directive

Airworthiness Directive ATA 73 – Engine Fuel & Control – Fuel Injection System Control Unit – Modification / Software Update

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ECU firmware (V517R8)

ECU firmware update (V517R8)

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AD 2020-0056

Airworthiness Directive AD No.: 2020-0056 Issued: 13 March 2020

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SOLO 262502i with electronic fuel injection Subjekt: ECU-Firmware update.

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