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Had to replace the camshaft and exhaust valve rocker arm due to abnormal wear. The cam lobe was ground nearly completely off! Now I have a no start. The only service manual I've been able to find for this is the HS 500-700 edition. This manual shows a split head with 5 valves. Mine is 2 valves with a machined 1 piece head. The HS400 head looks the same. The problem is that neither of these give an accurate description of how to set up the timing after a cam replacement. I watched the video that is posted on this site but that is for the split (2 piece) head. I have attached a picture of how I lined up the timing marks. What have I done wrong? Timing gear, all marks to top. Crank (thru armature peep hole) is there. 3rd line, top center but it doesn't sound like I have decompression. In fact, my go round put me at least 2, maybe 3 links off (early) and I actually thought it was going to run. I could hear the motor pop but wouldn't fire and run. After I readjusted the chain I get no indication of any fire and sounds like no decompresion. ??