i have a quad 75 on CH IGnition, draws fuel like a thursty buffalo, but wont start , mabey , its getting too much fuel.
spark is very good , ??????

Sounds like need carb kit

a carb kit was installed , itS being a pr@#$#%@@@@K

Would you say the engine is flooding? If so, I would look at the metering diaphragm again and make sure it was installed on the right side of the gasket (cover plate side) and that the metering fork is engaged on the diaphragm center post. Do you have a way to do a pop off test? That would confirm the metering needle is seated properly.

I had a similar problem with one of my old Q 75. It looked to have plenty of spark but simply would not run. Problem turned out to be a bad mag coil. It had spark but not enough to fire under pressure in the cylinder. Are you sure your CH ignition is putting out what it should? Plug lead and cap in good condition? New plug? Maybe try a different plug?

Double check the carb, sounds like the internal needle is stuck or bad. Check the arm that lifts the needle, some just rest on the button on the diaphragm, some need to be hooked into the grooves on the button. I have seen both on walbro carbs. If yours needs to be hooked and you did not hook it, it will flood like crazy.
Larry

thanks much, larry , its not really flodding like crazy , but it seems to come off prime real easy. now that ive been messin with it,
the crankcase is probably full of fuel , from priming fuel into the spark plug hole. i put a new float needle in it when i had the carb down.
it seems to give a sign of life , then just refuse to get back to it.