yamaha ox66 225 issues

[SkunkBoat]

Any progress? Always interested in any knowledge I can gain about OX66s.

You don't get buzzers or alarms...your buzzer works?

Could this be related to temperature? You say it runs great for a while...is it always good cold?
Maybe electronics acting up when hot?
Maybe an electrical connection?

Try a can of electronics freeze spray on various parts when it acts up.
(a can of "computer dust cleaner" will work in a pinch, its pretty cold).

What is the output of the regulator? greater than 12.8V?