I have a Yamaha S250 TXRU 1996 that starts but goes dead within 5 sec. Replaced primer bulb because it would not stay pumped up. New one didn't help. The only way I can get it to start is to disconnect the enrichner feed pump and open the manual enrichment valve and pumping up the primer bulb. It then will start and go dead after about 10 sec. If I pump the primer bulb before it goes dead it will rum for about 20 sec. Any help would be greatly appreciated.
