GX390 Head/engine

[ukminch]

Hi all,

 

So the saga continues, got engine up and running nicely and had about 10 hours use before it stopped, dropped a valve and bent pushrod, but on closer inspection the hole where the valve guide goes in is now oval. I presume this means a new cylinder head?

 

Any ideas as to why this has happened?

 

Anybody got a spare head or indeed engine they want to sell?

 

R