:( My husband is trying to change the oil on a 15.5 briggs & stratton (riding mower) - he cannot find anywhere where it tells him how much oil needs to be replaced, and he does not want to put too much in. Can someone please help? :)

Does it not have a dipstick? Perhaps your engine is shown in this chart/? http://www.briggsandstratton.com/maint_repair/routine_maintenance/changing_oil/oil_capacity_chart.pdf


Morrowrj