Blown Gasket

11.01.10: In preparation for fitting the upgrade parts (ported & milled 14cc head and gx390 carb) I found upon removing the cylinder head that the gasket seal had failed. Not sure how long it’s been like this and possible oil leak into combustion chamber too as there’s a greasy, sooty (been running rich) residue inside the head chamber and on the valves as the failure section is very close to the oil channel. That could be normal though for running rich but I’m no expert.


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