Griff

With no secondary PV, you want about a 10 jet size increase in the secondaries. The PV acts like a jet that opens with a reduction in vacuum. With no PV, you need to increase secondary jetting to compensate.

You need a PV in the primaries but not in the secondaries and the way you have it is fine. If you had a PV in secondaries, it would be open anyway as soon as you were into the secondaries anyway. You're just doing the same thing with more jet and no PV.

BY U BOY

Ok, I was fouling plugs so I am jetting down to 70's in the primary and 80' in the secondary. I am going to run the boat in the morning and take a plug reading.

I know this is the wrong time of year to jet a carb especially in HoustonI'll deal with rejetting in the fall.

RumRunner

You should be able to get the specs from their website:
http://www.barrygrant.com/demon/default.aspx?page=29

1BIGJIM

iTrader: (1)

825 is not listed.

BY U BOY

Ditto!

BY U BOY

I am getting some crazy readings on the plugs. 1 and 3 are a little lean 5 and 7 are a little darker than they should be.

2 and 4 are perfect. 6 is lite and 8 is OK.

could it be an air distribution problem with the intake? ZZ502/502 intake.