80s Mariner Yamaha 40hp 2 stroke powerhead. Motor was stored for years but ran good prior. I comp tested it a year or so ago compression was excellent. I just fogged both cylinders the fired it on starter fluid. It fires right up sounds great. It prob needs fuel system rebuild or replacement. I have a video of it firing up. Sold as is for parts repair rebuild. I have the same 15" tiller motor this powerhead could be used on that motor to make it electric start and remote. Payment due within 24 hrs of purchase