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I put new bearings in when I rebuilt it after buying it from someone. I have the copper head gasket on there and I doubled checked the o-ring on the back plate when I took it apart again after replacing the rod. I though it might have been the bottom carb o-ring since it was messed up when I...

Hello everyone, I have an S-Maxx with a 3.3 that I recently rebuilt and it was running great untill I broke a rod. I took the engine apart and the sleeve and piston looked good. So I ordered new rod and pin and rebuilt it. Now it starts up, but it's wide open even though the carb is fully...