Excessive oil in intakes? Low power problem

[batkins761]

I saw some oil dripping, slowly, out of my air intake. I pulled the baffle and there was oil on the surface and some slight pooling on the carb intakes. <br /><br />This is a Yammy ProV150 ('89) with oil injection,<br />and the oil looked like just oil, not oil/gas mix.<br /><br />It appears to be most pronounces at the lowest of the three carbs.<br /><br />Is this a problem? I checked the reed valves recently and they seemed fine.<br /><br />I'm still looking for a power problem I've been having. It starts readily and usually idles smoothly when cold. After a short run idle is rough and it often stalls.<br /><br />When running at speed it is sometimes low power, some times ok. Sometimes when at WOT and experiencing low power it will surge forward and I'll see about a 600-1000 increase in RPM. <br /><br />It needs decarbing, probably a carb overhaul, and maybe a fuel pump (I replaced one that was cracked last year, but didn't service/replace the other one).<br /><br />I checked with a induction LED and all cyclinders had spark during the rough idle. I didn't try to arc the wires or pull them, just check the LED. Is that enough? Have I rulled out the spark?<br /><br />I have replaced the spark plugs before, and will again after the decarb, but that didn't solve the problem. I have heard people having problems with NGK plugs, even new. Is that still the case? Is there a another brand for the ProV150 (wants NGK B8HS-10s at 0.040)? My book doesn't show a cross reference for that motor.<br /><br />Thanks!<br />Brian Atkins