2008 excalibur 343 runs rough, ideas to check?

[8urchvy]

Just an update. No compression in #3 cylinder, dealer pulled head and found "mushroomed" valve (going to have a look today)... Not exactly sure what they're describing but sending head to machine shop to be repaired... Estimate around $1500 parts and labor total... Of course most of that is labor...
Everything else checked out fine.. Cylinder and piston fine, and all other cylinders in good shape with excellent compression.

Thanks for the update. This is helpful to know. I’m going to have to pull the head on my boat. I’m 90% sure it’s the same issue.

Send a pic if you can.

[8urchvy]

Also, at 1,100 hours, maybe do both heads. They already have it apart.