I bought this Sanli with a Honda engine and on inspection found the rocker for the exhaust valve sitting on the bottom of the valve housing. Somehow the push rod guide had been broken as you can see in the photo. I was told the mower had not done much work and after setting the valves I was able to get it to start before I realised the guide was broken. I thought that would be an easy fix but I'm having trouble undoing the bolts that hold it on. A socket won't reach and a ring spanner doesn't fit cleanly because of the engine walls. I thought of a tube spanner but my experience of those is that they are usually pretty weak and I think it would warp before undoing the nuts. There are lots of people here who take engines apart and would know how to do this and I'd appreciate your advice. It's probably easy when you know how, I hope. The alternative is to cut out a new guide and fit it over the existing broken one.[Linked Image]