When I step on the gas the motor will rev up then hesitate for a second then continue to rev up..It's a holley 4150 with stock size jets and powervalve.. Fresh rebuild... bought boat in Vegas and live in  ogden, ut.. 4500 ft.. Where am i off in the jetting... Primary??? Secondary??? Powervalve??? Help    Other than that it runs on a dime.. Plugs are a nice chocolate color...

ok here is the deal... When she is hot she won't start sometimes.. after alot of head ache and a little trouble shooting with the multimeter my dad and me have found i'm only getting about 8-9 volts at the coil in the start mode... Once she is running it drops down to 6 like it's supposed to.. So I'm assuming the resister is still good... I have made a little jumper wire with som clips and when she won't start i just hook it from the coil + plus side to the 12 volt side on the resister and she will fire right up.. So am I looking for a loose wire?? Which I can't find or is it something mechanical? My dad swears up and down it is a loose wire.. Im just not sure about that though... Only happens when it is hot..

Oh and I could be wrong about the 6v at run and 8-9 at start.. it could be the other way around.. But it is still wrong I should have a full12v on the start circuit....    I have a mallory unilite dizzy with an Accel coil... 76' nordic with a 460

Ok so here is my issue.. The fellow i bought my Nordie from "modified" the Basset T-Valve so there would be just enough water going through at idle to cause a slight steaming effect in order to keep the headers cooler... I Idle it more and tend to get just a bit of water in tne oil than I would prefer  ... So My question is I'm going to redo the system by either buying a new T-valve or going with a manual control from Rex Marine.. I have no experience with these manual dealios.. So what do some of you guys prefer and can I run just the manual control without a T-valve or do I need both... Thx Guys