B&S excessive oil use.

[Coffield]

Well it's all back together now.
I mowed for about 90 minutes and the oil leave is down to the add mark??

Anyone got any more ideas.
New head gaskets, crankcase vent.

 

[bertsmobile1]

have you had a real good look underneath the engine ?
If it burned 4 oz of oil in 90 minutes you would be leaving a smoke trail that would do James Bond proud.