93 J150GLETR

The butterflies are in synch but look to be just a few degrees away from opening completely at WOT. Motor is equipped with hotfoot. How do I make this slight adjustment? I've got the OMC manual, but either I've missed it or it doesn't say.

Also, I keep reading about a 'roller cover' that sometimes breaks off. Where is this located so I can check it? I've looked closely at parts diagrams and from what I can tell this particular motor may not have one anyway...

Motor is running strong, but I'm just trying to make sure it is dialed in completely and get it to full speed. Once this is done, I've got a little work to do on my setup and then it's all set!!! Credit due to the guys on this board who have helped me track down a couple of issues to get this far. You've saved me big $$$$ and a lot of time!!!

Thanks!!!