Here's an engine manual.
http://www.smallenginesuppliers.com...seh_Cast-Iron_Engines_Service_Information.pdf
There's a member in here called GT_80 and he was talking about setting the timing on a HH120 over a month ago. He said the problem ended up being the carb but he got the engine running great. I can't speak for him but he would be a good one to ask if he has time to help.
http://www.smallenginesuppliers.com...seh_Cast-Iron_Engines_Service_Information.pdf
There's a member in here called GT_80 and he was talking about setting the timing on a HH120 over a month ago. He said the problem ended up being the carb but he got the engine running great. I can't speak for him but he would be a good one to ask if he has time to help.
