Introducing The Polini Thor 250 Water Cooled Paramotor Engine

parajet thor 250

New for the 2013 season is yet another ground breaking engine design from Polini.     After having major success with the 200 Thor this year, Polini has designed an even better engine.  This new engine is 250cc’s and produces a whopping 36+ horsepower. The Polini Thor 250  is only .5 kgs heavier than the 200!    It will feature the same balanced crankshaft that creates a near vibration free experience just like the 200.

This new engine will be ideal for trike pilots, tandem pilots or even light weight aircraft.  We’ll have some Thor 250 equipped Parajets soon as well as a trike setup that will be ideal for this new engine.


Here are the specs –

Polini Engine 2 stroke monocylinder
Cooling Liquid cooled
Bore for stroke 72 x 60
Displacement 244 cm3
Cylinder Aluminum with Gilnisil coating
Compression ratio 11,5:1
Piston Two chromium plated rings mm 1
Intake Reed vale in the crankcase
Carburetor Polini PWK
Air filter Air box
Ignition Electronic and with battery charger possible
Battery charger prearrangement Output power 80 W at 5500 RPM
Spark plug hood 5k Ω resistance
Fuel type Lead free petrol with 2% synthetic oil
Gear reduction unit Helical teeth in oil bath with 2,8 reduction ratio
Starting Pull start with self winding cable FLASH STARTER (Electric starter optional)
Clutch Centrifugal in oil bath
Muffler Expansion with oval silencer
Engine weight 18 Kg (19kg with electric starter) without radiator
Propeller rotation Clockwise

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7 thoughts on “Introducing The Polini Thor 250 Water Cooled Paramotor Engine

  1. Dear Sir or Madam.
    I would like to mount the Thor 250 water cooled engine on my quicksilver gt400.
    Questions I have are.
    1. Would you recommend it.
    2. Do you have any prior experience with that adaptation.
    3. What is the TBO of the engine.
    4. What is the factory)price in U.S. Dollars. (Not including Shipping to U.S)
    Thank you for a response.
    Darren Stevenson

    • Hello Darren,

      While Europeans appear to have success with the Thor250, we have been reluctant to try it out ourselves. It fits a small niche in our sport, which we feel can be accommodating using engines with a better reputation for reliability and support.

      To that end, we decided early on to not carry the engine. You can get more info from if you are still interested.

  2. Hi Melvin!

    Thanks for reaching out! We’re not sure on the specs of the Pap – you will have to get in touch with one of their dealers.

    Sorry about that!

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