Dear ALl;

Thanks to all the folks.....I managed to strip the engine apart and look at the internals, gave the egine a good wash, and put everything back. Honestly, I do not know how long it was ran before, but I could not see many scratches inside. I tried to fire up with a new OS F plug, and an APC 13X8 on Coolpower 5% fuel. It starts, runs, but need the HSN to be turned to about 1 1/4 turn (default is 2 1/2) to get full power. After which when I try to idle (default 4 turns in at the LSN) it will die. A guy told me that the piston ring needs to be changed because the compression is no good. Is this true?