gazzer04 Posted February 8, 2015 Share Posted February 8, 2015 Has anyone had the problem of spark plugs stopping working ? The 1st one was only 2 hrs old,having warmed the engine up for a couple of mins it just died, looked at everything as not getting a spark then Colin lent me a used plug and it worked perfectly!! Bought a couple of iridium plugs and had no problem on last 2 flights totalling a couple of hours. Today warmed up engine for 3-4 mins got hooked in, re-started but not getting full power on run with wing overhead so aborted take off. Tried to re-start but no joy. Back at base put in a new plug and it fired up 1st pull and would give full power!! Any ideas on how a plug could get knackered after just 2 hrs flying? Thanks Gary Quote Link to comment Share on other sites More sharing options...
gazzer04 Posted February 8, 2015 Author Share Posted February 8, 2015 Should have said its a new V3 Parajet with the 190 Thor light pull start. Quote Link to comment Share on other sites More sharing options...
george1966 Posted February 8, 2015 Share Posted February 8, 2015 Hi I too am having issues, I took my v3 out today for its maiden flight. I had 3 short flights and had to land out twice with engine failure. I have not checked the plug but I hace emailed parajet. Email them yourself. Quote Link to comment Share on other sites More sharing options...
Guest Posted February 8, 2015 Share Posted February 8, 2015 Gary remind me mate... Is yours the one that was over primed that Clive Mason had a look at and sorted for you? Cant remember... If so is this a new issue? Hope your well mate. SW Quote Link to comment Share on other sites More sharing options...
willygofar Posted February 8, 2015 Share Posted February 8, 2015 Do you have any photographs of the spark plug, have you tested the plug to determine the cause of the defect, are we correct no spark? Any electrode and/or tip erosion prior to the stoppage? What should the gap be, and what is it post stoppage? Quote Link to comment Share on other sites More sharing options...
gazzer04 Posted February 8, 2015 Author Share Posted February 8, 2015 Gap looks same as new one but have noticed carbon build up around the plug lead end. Plug also looks fairly black but thought this may be due to flooding after it stopped and I tried starting again Quote Link to comment Share on other sites More sharing options...
notch Posted February 9, 2015 Share Posted February 9, 2015 It's very likely that your plug is "fouled", this is due to a mixture that is too rich at one part of the rev range. If your motor won't make full rpm, this sounds like your problem... -N Quote Link to comment Share on other sites More sharing options...
ptwizz Posted February 9, 2015 Share Posted February 9, 2015 Handy guide: Quote Link to comment Share on other sites More sharing options...
george1966 Posted February 9, 2015 Share Posted February 9, 2015 Parajet rang me 1st thing after sending an email last night. They have talked me through a carb adjustment so going to give this ago. There after service is good so let's hope the v3 will behave a little better next time out as I don't really like landing out. Quote Link to comment Share on other sites More sharing options...
gazzer04 Posted February 9, 2015 Author Share Posted February 9, 2015 Hi Simon Same issue I think although the instance you talk of is not the one, RAF Colin lent me a plug and it worked ok, have been up twice more since then with the new plug with no real problems. PS. Reserve ? Quote Link to comment Share on other sites More sharing options...
notch Posted February 11, 2015 Share Posted February 11, 2015 If it keeps on happening you can try a "hotter" plug. Reduce the plug number by one i.e. a BR10S becomes a BR9S. Quote Link to comment Share on other sites More sharing options...
gazzer04 Posted February 12, 2015 Author Share Posted February 12, 2015 Going to try some different 2stroke oil the one I have been using is a few years old, not that it should make any difference it's been fine in my strimmer. Thanks for comments. Gaz Quote Link to comment Share on other sites More sharing options...
gazzer04 Posted February 12, 2015 Author Share Posted February 12, 2015 George 1966 how did you get on after talking to Parajet? Quote Link to comment Share on other sites More sharing options...
george1966 Posted February 15, 2015 Share Posted February 15, 2015 Gaz they advised me to adjust my low jet on the carb, I went to the field today and put everything together, started the motor then it stopped. To cut a long story short we found the plug had failed just completely broke down which I found very bizarre. So off to halfords for a new plug, all seems well now, I went for a short flight and the motor behaved itself, although I am a bit twitchy as I cant understand why or what killed the plug. Quote Link to comment Share on other sites More sharing options...
Guest Posted February 16, 2015 Share Posted February 16, 2015 When you say 'completely broke down' do you mean physically ? SW Quote Link to comment Share on other sites More sharing options...
gazzer04 Posted February 16, 2015 Author Share Posted February 16, 2015 George I had noticed that there was quite a bit of oil on the prop so thinking it could be the 2stroke oil, I bought some new 2stroke oil and fuel cleaned the old plug (glass bead blasted it) put it back in and ran the engine up for 5 mins to clear out the carb, still got a bit of oil on prop, cleaned it off ran again for 5 mins and didn't notice any more oil on it. Hopefully this may have cured it. It was too misty for a fly but will try on next good day. Gaz Quote Link to comment Share on other sites More sharing options...
george1966 Posted February 16, 2015 Share Posted February 16, 2015 Good luck, I am hopeful its now sorted my end too. I went for a quick blast although pretty misty, I wanted to see how it was and it seemed much better. A little carb adjustment seems to have sorted it. I just have to get used to the power as it has more than my old parajet. Quote Link to comment Share on other sites More sharing options...
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