Have a 24hp B&S and the last time I started it up, it was not running right. Long story short, when I removed one of the valve covers, it was missing the exhaust valve push rod. I removed that thinking that I could see better into the crankcase but could not see. Looks like I will be tearing down the motor to find the missing push rod. I am wondering if I can leave the motor mounted to the frame and break to motor apart, leaving the sump section mounted to the frame. Anyone have any ideas? I have rebuilt smaller 3.5 - 5hp motors long ago in the past but nothing this size. Thanks for any help on this or other resources.