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New Engine ran well and now is un-driveable


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I don't think it is them, fresh engine and it cleans up as fuel runs out / air is forced into the carbs. If I can't figure it out I'll pull the head and check them out. Pistons look clean through the intake and exhaust though

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15 hours ago, jst854 said:

Stock jugs Eric Gorr woods port. I haven't reached out to him regarding jetting as it was running well, thought I had it pretty close until whatever this is happened

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I'd start there & see how far off you are if@ all

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Yeah slides are the same height, carbs synced. Compression is good. 125ish on both sides.
It runs well the 1st few seconds after I start it then it starts smoking a lot and is real boggy, won't idle, but won't die if you keep on the throttle will rev about 60-70% of the way out. If I shut off the fuel it runs well for a few seconds before it runs dry. Leads me to believe it is rich but I went from it running well with a 154 main and 50 pilot and now I have a 148 and 48 in it. Elevation and temperature no real difference between running well and this now

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Not sure, not very familiar with these carbs. I can pull the choke out and see through the passage on the side of the carb, besides that no. I take it just unscrew the choke and pull the whole thing out?

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