Yes, went through all the strokes and noted the valve positions, and they didn't match up to what they should be. Very difficult unit to strip down, so it is due to exit out the door any day now. I for one wasn't going to risk wasting more money on parts for such a rubbish unit. When the importer knows very little about the product, that rings alarm bells to me. They did say that there were several production changes within the same model, which tells me that it was a ''lets try this part and see if things improve'' type of assembly line. Cheap Ebay gen sets are good things to avoid at all costs. No parts, no build quality, no service backup, you are on your own with them.