quadrajet
12-03-2003, 04:25 PM
#13
Thanks, if not, are ya intersted in re-working mine???
I can fix big CHIT, and I build brain surgery equipment for a living, but somehow I always seem to screw up a carb??????? Something about all those small parts, and tweaking them just right, Give Me a BFH, and I'll fix it!!!!!!
I can fix big CHIT, and I build brain surgery equipment for a living, but somehow I always seem to screw up a carb??????? Something about all those small parts, and tweaking them just right, Give Me a BFH, and I'll fix it!!!!!!
12-04-2003, 08:54 AM
#15
Well, it started with that annoying, stumble when the secondaries opened, I adjusted the air valve spring, but it still has a little, only if you jam it real quick, if you advance the throttle slow it is fine. I have a feeling the secondaries are not rich enough, it is just a stock 350, but I added thru-hulls, and a Mallory electronic ignition, I am afraid I might be running a little lean at WOT, and dont want to burn anything up.
12-04-2003, 09:12 AM
#16
Guest
Posts: n/a
Likely Q-jet issues are: 1)sticking air valve (guess you've already eliminated that); 2) accelerator pump and adjustment of same; 3) low fuel level in bowl; 3) fuel pump pressure and volume (6-7psi); 4) dirty circuits (e.g. sticking discharge ball, sticking power piston).
Not having enough tension on the air valve spring can cause a bog as well; a 1/2 turn should work fine for a 350. Also, check your initial timing and advance curve.
You should be running at least CH secondary rods. A lot of Merc 350s came with CLs, which are too lean IMHO.
Not having enough tension on the air valve spring can cause a bog as well; a 1/2 turn should work fine for a 350. Also, check your initial timing and advance curve.
You should be running at least CH secondary rods. A lot of Merc 350s came with CLs, which are too lean IMHO.
