Yamaha has done its best to make the new motor an easy-starter, with an automatic decompression feature and a light-load manual starter with minimal end-play that makes the most of every pull. A new, larger handle is also easy to grip. Yamaha also fits these motors with its Prime Start feature (also used in the past on some Mercury motors built as a joint venture with Yamaha), an automatic enrichment circuit that replaces a choke. Prime Start delivers a richer mixture on cold starts and then gradually leans itself out as the motor warms up. here