I've got to replace an engine in our Scag 48 Tiger Cub. Right now it's got a FH641V-AS09 in it. According to Kawasaki, the replacement engine is the FH641V-GS09. Here's my question, can I use a FH641V-cs16 to replace this engine. All the specs look to be the same - and I can get it for about $500 less. My second question is - I've got the chance to buy a "parts" FH641v-as08 for about $200. Can I use the shortblock from this to rebuild my FH641V-As09? All the specs seem to match up and the crank is the same. Any help from certified Kawasaki mechanics would be really appreciated. Thanks in advance Restrorob!