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Polini Thor information for most models

The Thor models share a common design and many parts.  If you cannot find the info you need below or on the individual Thor model pages, check the Top 80 section for a wealth of info that is common to all Italian paramotors.

PARTS AVAILABILITY – an "*" after the item means we usually stock it.  We can get most other engine parts but it may take a week or more.  We are first a paragliding school and the rest of it we do when we have time.  Contact us to order.

General assembly instructions - It is CRITICAL when assembling the Thor engines that the manifold mounting nuts be properly torqued with blue threadlock if you do not want any leaks.

Assembly Video – This is for the Thor 130, other models similar.  If someone wants to send me $250, I'll publish a video of how to assemble other models.

Bearing condition

Bearing replacement

Break-in instructions

Carburetor* – The Thor 100 and 130 use the WG-8   The Thor 190 and 200 use the WB-37.  If your engine is not purring like a kitten in the mid-range, you need to perform the midrange modification on your carburetor.  The Thor 250 has a custom Polini carburetor (we do not stock this one).  It is more like the Bing which has a fuel bowl.

Choke control – This is needed for safety and convenience.

Clutch* – Information and servicing procedures.

Clutch Oil – Here is a list of the oils that can be safely used in the Thor redrive.

Coil secondary wire replacement – This is one of the most common points of failure in ignition systems.

Cylinder head gasket set and exhaust flange gasket* – contact us to order

Electrical troubleshooting – How to check the electrical system

Exhaust port oil leaks

Exhaust flange springs* – Use paraglider line to stretch the springs for replacement/removal.  Do not use Vise-Grips or pliers to stretch
     the springs because this will nick the tempered surface of the spring and weaken it.  Here is a video on how to properly do it.  A defective
     exhaust flange gasket cannot be fixed with RTV – replace the gasket.  Use PG line (best) or aircraft wire to secure the springs if they break.

Exhaust system installation – 1. Install springs first per above.  2. Install the buttonhead screw underneath carburetor first THEN 3. Install the
     buttonhead screw underneath the springs.  Use blue threadlock on screws and tighten 3-4 Nm (just snug, let the threadlock do its job).

Flash starter* – This starter has some major problems but they are largely fixable.

Flash starter Installation Manual – Here is the "how to" for installing the modified Flash starter insert into the original starter.

Fuel – This is from Polini.  See also the fuel oil specification page for more detailed information

Ignition coil – the black wire goes to ground, the blue wire goes to the kill switch

Kill Switch Problems – A low bidder made the wire used in the kill switch circuit.

Mounts, rubber* – Here is a way to quickly check them.  If you replace them with the heavy duty Viking mounts, do not make the mistake noted here.

Performance Issues, general – This is what to do if the engine will not start or, for example, dies at full throttle

Performance tuning – Most paramotors run poorly in the midrange, the range that we spend most of our time flying in.

Pulleys – see "Starter pulleys" below

Spark plug installation – this is the "how to".  For type of spark plug see 'SPECIFICATIONS" below


Springs, exhaust – see "Exhaust springs" above

Starter* – see "Flash Starter" above

Starter pulleys – The OEM Viadana pulleys will quickly wear out and fail.  Here is the solution...

Starter Replacement Cord – The strongest and longest lasting you can install on your engine.

Starting – Start your engine the first pull, every time.

Stress cracking of engine components – see "Mounts, rubber" above

Throttle cable – Cleaning, lubrication, modifications, and cruise control info.

Torque Values – Check the specific Thor manuals on this website for most torque values.  If you cannot find the correct value, check the the Top 80 specification page which has a thorough torque section.  Hit "page down" twice to see it.