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Pap ros 125 owners 40:1 or 50:1 fuel mix ?


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Hi all,the guy I fly with has had his pap ros 125 for 2 years and his motor is always a little smokey ,I asked him what his fuel mix is and he said 40:1 ,I fly a pap top80 which is 50:1 ,and hardly smokes at all ,we both use the same castrol tts oil,on the pap website it does say 40:1 for the ros 125 ,but why ? parajet are all 50:1 ,was just wondering what ratio other pap 125 owners use ..thanks in advance :mrgreen:

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40-1 ....with fully synthetic for me....piston replaced with the new one at around 60hrs....(as a precaution)...although it did not look like there was anything wrong with the old one ?? now got around 120hrs on it and it sounds as sweet as...should I say that !!! :o

(I am not supertitious) YET

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