Just another thought ...... how long ago were they done ?

https://cimg8.ibsrv.net/gimg/www.off...8f02713a85.jpg
I couldn't get a good picture and laying the valve on the table it didn't rock. I have 4 short seasons and about 45 hours on it. He did put stainless intake valves in it this time i just didn't want it to happen again.

Cant really tell anything by that picture but if the engine was built 4 years ago and you only have 45 hours on it I was wondering if the fuel is old and turning to glue and holding the intakes open ? I have seen it more times lately than I can count. Or if the fuel is getting bad enough it can cause detonation which will also affect the valves.

Just thinking out loud :)

BillK you obviously dont know what you`re talking about .
I filled up with bad gas (basically laquer) and 5 minutes later my intake valve didnt intake so much anymore but when i posted the pic I was told bad gas doesnt do that , Im wrong and its something else .. just a coincidence.lol

https://cimg5.ibsrv.net/gimg/www.off...9e11b4c778.jpg