DOES A 1997 BF40A HAVE A RELIEF / POPPET VALVE?............ I ORDERED THE SELOC HONDA REPAIR MANUEL AND IT CAME TODAY, BUTI I HAVE NOT YET FOUND THIS INFO AND I'IVE REPLACED MOST EVERYTHING ELSE (T-STAT,IMPELLER KIT WATER JACKET...) ON THIS USED MOTOR INCLUDING THE HEAD GASKET THIS WEEK. IT'S...