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quisp@bigfoot.com wrote:
> > Hi Folks, > > Well, Im still on the ground. After a ridiculus amount of jetting changes Ive > discovered that my PTO side is hot (1300 EGTs) and my mag side is rich. What > could it be? AN AIR LEAK INTO THE pto CYLINDER? Theres some slight oil seepage > out of the PTO side by the bearing also by the cylinder to case joint. > > Mikuni VM32, Stock Cuyuna exhaust. EGT probe on PTO side. 1300 EGTs. If I > jet up, it bogs down and starts 4 strokin but the PTO egts are still up at > 1250. I am as rich as can go and still run (both main and needle). > > Help me!!! I have found a nice rope to hang myself with in the corner of the > hangar (so as not to disturb the others who are FLYING!). > > A very frustrated Jorge. first off, I would certainly repair the engine. You mentioned at least two things that would cause me to pull it down, replace bearings possibly, crank seals for sure, possibly rings, and reassemble with proper timing. It is hard to diagnose trouble when the seals are leaking and the case gasket has failed. Or perhaps we already did !! Also, where is the EGT probe ? I have seen it in the muffler, past the joining area of the Y-pipe, etc. All wrong locations. You have raised the fuel to air mixture and it is running rich, so dont do that. The air leaks will affect the closest cylinder and screw it up and no ammount of jetting can chanhge that problem without screwing up the NON-leaking cylinder. Replace the seals and base gaskets, and check the probe location, and then come back with questions,,,, and most 430s I have seen ran with high EGT readings even after all the above were in great shape,,,, -- Mark Smith Tri-State Kite Sales http://www.trikite.com 1121 N Locust St Mt Vernon, IN 47620 mailto:mark@trikite.com |
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