mojacarflyer Posted December 25, 2008 Share Posted December 25, 2008 can anybody help,i have a pap top 80 paramotor,when i rev the motor up to full power(9700 rpm) after about 20-30 seconds the power slowly starts to drop off down to about 5500rpm, it ticks over ok, when i give it full revs again the same thing keeps happening, i have cleaned fuel tank and put fresh fuel in, changed primerbulb and fuel lines, new spark plug,checked read valves,removed and cleaned all of carburetta and jets,changed filters and diafram, still the same problem,i have been told it may be a coil breakdown,has anybody had this problem, if so, what is the solution, any help is apreciated,thanks chris.... Quote Link to comment Share on other sites More sharing options...
pete_b Posted December 25, 2008 Share Posted December 25, 2008 Did you definitely clean the very very fine gauze filter just inside the fuel inlet in the carb? You really need to pick it out very carefully with a pin. Pete b Quote Link to comment Share on other sites More sharing options...
gordon_dunn Posted December 25, 2008 Share Posted December 25, 2008 Also, check the metering valve- sometimes during the priming procedure these can get stuck in, and need to be released/cleaned. Sometimes a bit of dirt or debris can effect these. GD Quote Link to comment Share on other sites More sharing options...
dantheman Posted December 25, 2008 Share Posted December 25, 2008 I screwed up my internal carb settings and got similair results by having the meter lever set to low, bending it up just one mm at a time should increase the fuel flow assuming it's a starvation problem (too lean), only takes a few mins to try. Quote Link to comment Share on other sites More sharing options...
mojacarflyer Posted December 27, 2008 Author Share Posted December 27, 2008 thanks for your reply, yes i have cleaned out the guaze filter every time i have removed and cleaned the carb, thanks chris Quote Link to comment Share on other sites More sharing options...
pete_b Posted December 27, 2008 Share Posted December 27, 2008 thanks for your reply, yes i have cleaned out the guaze filter every time i have removed and cleaned the carb, thanks chris Double check that you have not got any kinks in the fuel line to restrict flow. The air vent to the tank is clear. There are no air bubbles in the fuel line going in to the carb(at high rpm) If all the above are 110% ok then Start it up and run flat out at what ever rpm it runs to then hit the kill switch and stop the motor keeping the throttle fully open. Take the plug out and check the colour? If it is running lean then check the metering valve. If it is NOT running lean then check Coil ? get a replacement to try Exhaust blocked (cut end off and check) or borrow one to try Pete b Quote Link to comment Share on other sites More sharing options...
mojacarflyer Posted December 29, 2008 Author Share Posted December 29, 2008 thanks lads for your sugestions,i will try all the above over the next few days,(new year comitments and all) i will let you know how i get on, chris.... Quote Link to comment Share on other sites More sharing options...
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