Hi guys I'm new on here. Using this as a last resort. My mb6 had a cracked valve so I replaced it. Everything went together, I've compression tested it and it's around the 150 mark on all of them bar one where that sits at around 130-140. It has compression, it has spark, it has fuel, I've set the timing as per timing marks for the bottom and top so timing isn't an issue but she doesn't want to start. I'm at the end of my tether now having spent the last two days problem solving. If anyone could she'd any light on me it would great. Many thanks. Treve