SawTroll
Information Collector
Yes Niko I did mean 220 lbs. Thanks! I will edit that. I will get you the numbers later today when I go to the shop.
This was the compression just after the first start, having burnt the assembly lube off.
View attachment 516820
My impression is that is perfectly normal on a healthy 621 - and I have seen much higher numbers posted. It also was one of the first models to have a Nikasil coated bore, as far as I know.
One of the reasons for the high compression likely is the domed piston.