Engine GGP ride-on mower GGP WBE170 Model: WBE0704 For ride-on mower: - EL63M with manual start. Can replace your Briggs and Stratton engine with left exhaust. For ride-on mowers before 2009, you need to change the throttle cable reference 184000254/0. Old reference: WBE0704Sold with exhaust. We also recommend the elbow to divert gases under the plastic carter. reference 18738201/0. Don't hesitate to contact us for any information.