Who knows what model holley is the standard carb on an HP500? 700, 750 ??

800 double pumper on the 500.

JCPERF is right, as usual. I'm looking at the Merc Service Manual and it says it's a 800 CFM, Manufacturer's number 80466, 6.5 power valve in front, none in rear. Stock jetting is Primaries-Port-81,Starboard-75. Secondaries-Port-89, Starboard-93

big demons come on the merc super cat 750s.

got a new 1 for 400.00 shipped.