That's not to bad of an oil leak for about five hours use I;ve had oil run down the side of the mower from the same leak in less than 30min of run time. The dipstick Oil Filler Tube never seem to seal right on the briggs I've worked on and use,the plastic tube seems to warp over time and not seat right. I pull it all off clean it and put a new o'ring on and plenty of Three Bond to seal it...If oil weep out of crankcase gasket seem excessive I will pull the motor and re torque crankcase bolts ...As grumpy has said a Briggs engine is no Honda oil and fuel weeps seem to be the norm from the working on them I've done.. Hope that may help all the best in working it out.
Last edited by chris125; 27/12/14 11:27 PM.