Roger10378 wrote:
Another problem with small engines is that the valve seats wear enough that the valves don't seat anymore. Did you check the gap before you disassembled?
While excess clearance on valve adjuster may indicate worn valve seats, it does not mean that the valve is not sealing.
Compression test and leak down test are the gold standard for checking engine combustion chamber seal.
Excessive valve stem to valve guide clearance will result in high oil consumption but if the valves are sealing, the engine will run.
