Check the adjustment screws on every rocker arm to (be sure) see if there all in the same position. Rotate the engine & see that none 'bottom out' etc.
If this is the same assembly that this engine ran with before; the adjustment will be about right for "start up".
After It's running you can 'dial in' the correct adjustment which is zero + what ever the manual says with the engine hot, running.
This is one of those few times where "about right" is okay.
Good luck.
