HEAVY engine vibration

[sen2two]

Originally Posted by classicauto

whats the story on the plugs?

Seen new plugs foul almost instantly from being gobbed with vaseline/assembly lube after the first start up. I'd toss a fresh set in and just see what happens.

thats was my first guess also. no luck... Its using B9ES plugs also, wich are plugs for jet skis. And are EXTREMELY hard to foul out. Thats the reason i use them for start up... I also use them in my personal car year round.