wont idle in the water but on the ears ok..all new carb kits installed,fuel filters r clean checked comp. 110-100 all cyl.,new plugs,replaced water separator,disconnected shift neutral switch,,last nite went down to ramp and could keep it running by choking it before it would die,maybe fuel pump but it runs like a top at 1200rpms,haven't tried to just idle it up a little, it runs about 500rpm on idle until it dies please help me thanks