how many hours are on those, solid roller ?

Yes, solid roller. Don’t know the hours. I did rebuild the engines last winter but didn’t change the rockers because they looked fine.

now I will change all and want to know if Jesel pro steel is the way to go or if you guys have some other input?

thankful for the help I can get from you guys that may have input.

The Mohawk is a lightened version. Not really the right application in an endurance application such as a boat. They're meant for drag cars that run for a minute or two, see 7500rpm, and get shut off. I'd move to a solid body. Jesel or T&D. Both excellent companies.
. Should you decide to part with the current set, minus 1, please let me know.

Aluminum has a much shorter cycle life than steel. if one went others may not be far behind. Crower makes a nice set of stainless shaft rockers.

Just curious, what wall thickness push rod are you running

I have 31 of those rockers sitting in a box in my garage. I went to the Jesel Steel series and am very happy I did. I sleep better after breaking an aluminum one.

Someone else mentioned it but there is a certain limit on turns on the adjusters.

Also, I'll recommend the LSM torque wrench - great product with a preset torque reading. Makes rocket replacement REALLY EASY even for a dumbass like me....

T&D steel shaft mount... can't beat them!!

I would send the whole set back to Jesel for rebuild and inspection... then ask them what they suggest.
My experience with them in the past has been stellar... with fantastic customer service.

If it were mine, I would have the strongest rockers available on there.

Nothing to do with your failure, but 320 cc heads on 615” motors with 14-71’s? Seems kinda small. What do they make for power?

I had T&D Studded Rockers on My Big Blower Motors. Never a Problem, They Made around 975HP with 1071s for your reference.