GerardTC Posted May 12, 2019 Share Posted May 12, 2019 (edited) Hi there, I am new to this forum, although I've been reading you for quite some time. I am experiencing some issues with my Polini Thor 200. When flying between 5100 and 5400 rpm the thrust is never constant. This only happens at this rpm range, so it's very annoying keeping level flight. I guess the carburetor (PWK) has something to do with it. Any of you have experienced this issue with your paramotor? Thanks in advance and sorry for my English. Edited May 12, 2019 by GerardTC Quote Link to comment Share on other sites More sharing options...
admin (Simon W) Posted May 14, 2019 Share Posted May 14, 2019 Hi Gerard, The Thor 200 has to be the single most unreliable engine that I know to exist. I would highly recommend that you fit a temperature gauge if you have not already done so as they tend also to run hot. There are a couple of people who know loads about these engines and can most likely help. @MOSS has a repaid centre near Lambourn. He is on holiday at the moment but fire him a message and I am sure he will reply when home. Welcome to the Paramotor Club!! SW Quote Link to comment Share on other sites More sharing options...
GerardTC Posted May 14, 2019 Author Share Posted May 14, 2019 Hi Simon! Thanks for your reply. I have a temp gauge and I constantly watch it to avoid over heating. In level flight (despite the problem with rpm) I get around 170-190 ºC. At higher rpm I never let it go over 230ºC. Quote Link to comment Share on other sites More sharing options...
coolhand Posted May 14, 2019 Share Posted May 14, 2019 13 hours ago, admin (Simon W) said: Hi Gerard, The Thor 200 has to be the single most unreliable engine that I know to exist. I would highly recommend that you fit a temperature gauge if you have not already done so as they tend also to run hot. There are a couple of people who know loads about these engines and can most likely help. @MOSS has a repaid centre near Lambourn. He is on holiday at the moment but fire him a message and I am sure he will reply when home. Welcome to the Paramotor Club!! SW I would have to disagree with the statement "single most unreliable engine"! Is it flawless, No, are there some specific issues (flash starter) Yes. However I fly one, and many friends do also with great performance and reliability. It comes down to, on time maintenance and some TLC. Quote Link to comment Share on other sites More sharing options...
GerardTC Posted May 14, 2019 Author Share Posted May 14, 2019 Hi there, Today I changed the pilot and main jets. Previous combination was 48-142 and the new one is 45-140, more appropriate to the altitude and temperature I use to fly (300-700m, 15-25ºC) However there's still more margin of adjustment by tightening or loosening the air screw. Can someone tell me how it works? Counter clockwise makes the mixture leaner? Thanks in advance! Quote Link to comment Share on other sites More sharing options...
admin (Simon W) Posted May 15, 2019 Share Posted May 15, 2019 'Fragile' may have been a better word to use. SW 1 Quote Link to comment Share on other sites More sharing options...
Mark Morgan Posted June 5, 2019 Share Posted June 5, 2019 5000 rpm area is not jetting.. either needle taper or Clip position.. Try also fitting the New HF kit with new carb, cowl, head. reduces the head temp by 100c We have them in stock at sussex paramotors Quote Link to comment Share on other sites More sharing options...
GerardTC Posted June 6, 2019 Author Share Posted June 6, 2019 (edited) Thanks for your answer @Mark Morgan I didn't find much information about the High Flow Kit for the Thor 200. Some questions if you don't mind: Which carburetor does it mount? Does it leak fuel if not positioned vertically? Is it difficult to set (adjustments with mixture, idle, jets...)? The PWK is a nightmare... Is the claimed temperature drop real? On my Thor 200 the spark temp ranges between 180 and 200ºC. Up to +230ºC at max RPM. Is it easy to install with some mechanical knowledge and the right tools? Thanks in advance! Edited June 6, 2019 by GerardTC misspelling Quote Link to comment Share on other sites More sharing options...
Mark Morgan Posted June 7, 2019 Share Posted June 7, 2019 HF200 comes with PWK and easy to tune, like anything easy when you know how.. All PWK carb have a breather so will leak if you do not drain it. Saying that my 250 never leaks. PWK is a much better carb than the Walbro for tuning. I think it's a very easy job. it's just a new head, cowl, carb etc.. not rocket science.. But if your a monkey with tools then it might be worth getting someone to do it for you.. Quote Link to comment Share on other sites More sharing options...
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