Hello all in need of a little advice

[westman]

This sounds a bit harsh, but it can happen.When they fitted the air filter some kind of small metal or other particle found its way into the inside of the air filter / air intake and was sucked into the cylinder when the engine was started.I had a similar problem a few years back,an apprentice servicing an engine lost a tiny washer from his top pocket.He started the moter after the service and discovered it had developed a mysterious rattle.I ended up stipping the engine and found the remains of the washer embeded in the piston .