Ulterra Maintenance

Just curious to see what type of maintenance folks do, if any; on Ulterra & Ultrex MK's. Mainly wondering if the power head O-rings should be replaced to make sure the seal is good. My motor is a 2011 and just want to try and avoid more costly preventable problems.

On the Ulterra, I follow the factory recommendations. I use a water based silicone on the shaft and belt. I use marine grade grease on the locking pins.

I do not tempt fate by opening up the power head. If it isn't broke, don't fix it.