wallboy Posted June 16, 2014 Share Posted June 16, 2014 I have a Simonini Mini 2 Plus with a Walbo WB37C carb and it wont run full revs as it boggs down after half throttle. If anyone else has this engine, how is your carb set up and what oil ratio are you running? The manual says 3% but 150ml per 5L seems quite a lot. Quote Link to comment Share on other sites More sharing options...
pete_b Posted June 16, 2014 Share Posted June 16, 2014 2 percent from new fully synthetic. Start and warm the engine then with someone helping you run the motor full throttle and adjust the high jet IN until it starts to lose revs (note the position) OUT till it loses revs (note the position) now adjust it so it is mid way between these points and that should be right. Pete Quote Link to comment Share on other sites More sharing options...
wallboy Posted June 16, 2014 Author Share Posted June 16, 2014 I have just tied this and the stupid thing still wont rev properly, full throttle does not sound smooth at all. I have also replaced all the fuel lines, the filter in the tank and removed the primer bulb incase that was starving it of fuel but still no luck. Quote Link to comment Share on other sites More sharing options...
pete_b Posted June 16, 2014 Share Posted June 16, 2014 Look at the plug, is it black Quote Link to comment Share on other sites More sharing options...
wallboy Posted June 16, 2014 Author Share Posted June 16, 2014 Look at the plug, is it black Yeah just a little Quote Link to comment Share on other sites More sharing options...
pete_b Posted June 16, 2014 Share Posted June 16, 2014 Adjust the low screw in 1/4 of a turn and try it again, if it is still the same turn in 1/4 turn again till it runs ok or bogs down on acceleration. if it does bog down open the low screw back up a little at a time until it picks up cleanly Quote Link to comment Share on other sites More sharing options...
wallboy Posted June 16, 2014 Author Share Posted June 16, 2014 Thanks for your help Pete. I will try it when I get a new plug and hopefully with a little luck it will be ok. Quote Link to comment Share on other sites More sharing options...
pete_b Posted June 16, 2014 Share Posted June 16, 2014 No probs Quote Link to comment Share on other sites More sharing options...
wallboy Posted June 17, 2014 Author Share Posted June 17, 2014 Well looks like I may have found the problem. A filthy diaphragm. Quote Link to comment Share on other sites More sharing options...
Guest Posted June 19, 2014 Share Posted June 19, 2014 Did a de-gunge sort this in the end? SW Quote Link to comment Share on other sites More sharing options...
wallboy Posted June 19, 2014 Author Share Posted June 19, 2014 Did a de-gunge sort this in the end? SW Nope still not running properly. I have opened a new thread about the problem now. Quote Link to comment Share on other sites More sharing options...
elan Posted August 12, 2021 Share Posted August 12, 2021 Does anyone have a good maintenance manual for a simonini mini 2 plus. The OEM manual stinks Quote Link to comment Share on other sites More sharing options...
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