bignos Posted October 3, 2009 Share Posted October 3, 2009 The 'Bargain' that i have bought from that website with all the quality merchandise (ebay), is smoking excessively, black oil is dripping from the exhaust. Its a two stroke so it cant be the rings, over fuelling? i just dont have a clue, any ideas?? posting.php?mode=post&f=4# Quote Link to comment Share on other sites More sharing options...
alan_k Posted October 3, 2009 Share Posted October 3, 2009 Firstly what fuel mix are you using Alan Quote Link to comment Share on other sites More sharing options...
bignos Posted October 3, 2009 Author Share Posted October 3, 2009 250ml synthetic oil to 10 litres (may have measured over slightly) Quote Link to comment Share on other sites More sharing options...
fanman Posted October 3, 2009 Share Posted October 3, 2009 Trying to remember what type of motor you are talking about, was it a Simo? We have been running a FB Simo for over 40 hours now at 60:1 and are contemplating going to 65:1 as it is so throttled back it still shows signs of fouling. You are currently planning 40:1 and imply that you also add a bit 'for wife and kids'. No wonder it smkokes and chucks out oil. By the way, PAP says to run a Ros at 40:1, we run them at 50:1. PAP say to run a Top80 at 50:1, we run them at 65:1. Diego Cecceto, the Top80 designer runs his even leaner on oil than that. If a leaner mix doesn't resolve the issue then I'd be looking at too low reseat pressure in the carb (assuming its a diaphragm carb). Does it tend to run rich? Quote Link to comment Share on other sites More sharing options...
bignos Posted October 3, 2009 Author Share Posted October 3, 2009 its an MZ34 engine and i have only just picked it up, so am unsure about how it runs as of yet, its just churning out black oil, should it be black? ps, my walkerjet needs a magneto but they will not respond to my order?! so i had to buy something to fly around in until i get the bits!! Quote Link to comment Share on other sites More sharing options...
Phil_P Posted October 3, 2009 Share Posted October 3, 2009 The 'black oil' is just uncombusted two stroke oil mixed with sooty carbon deposits. If you had run a two stroke motorbike in the seventies, you'd be used to it Don't worry about it. More important is the state of the plug. Phil Quote Link to comment Share on other sites More sharing options...
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