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weber primary jets

sharkin95

sharkin95

Regular Contributor
Does anyone know the primary jet size for a Weber 4 b. carburetor on a merc 4.3 1997 part #835078 the sec are .089??
 
sharkin95 said:
Does anyone know the primary jet size for a Weber 4 b. carburetor on a merc 4.3 1997 part #835078 the sec are .089??
Click to expand...

Ayuh,.... I donno, but the Webers are tuned by changin' the needles, 'n rarely the jets,....

Edlebrock has a nice street/ strip tunin' kit with jets, needles, 'n springs,....
 
Picked up a Carter 10-201 street kit on e-bay for $40.00 and did some experimenting I left the .089 prim and .089 sec. jets in and just changed the rods,I removed the 68x57 and yellow springs replaced them with .0715x.058 orange springs Well what a difference the hg's went from 19 to 20 I'm out on the adjustment screws 1 1/2 -1 1/4 turns, I went from 7.5 gal per hr. to 6.2 @3300rpms. The information sheet that comes with it is worth more than the jets and rods I will try to post the information.My engine is 1997 4.3 v6 reman. with vortec heads, thunderbolt 4, Mallory coil, with 50 hrs on it.
 
Last edited:
sharkin95 said:
Picked up a Carter 10-201 street kit on e-bay for $40.00 and did some experimenting I left the .089 prim and .089 sec. jets in and just changed the rods,I removed the 68x57 and yellow springs replaced them with .0715x.058 orange springs Well what a difference the hg's went from 19 to 20 I'm out on the adjustment screws 1 1/2 -1 1/4 turns, I went from 7.5 gal per hr. to 6.2 @3300rpms. The information sheet that comes with it is worth more than the jets and rods I will try to post the information.My engine is 1997 4.3 v6 reman. with vortec heads, thunderbolt 4, Mallory coil, with 50 hrs on it.
Click to expand...

Ayuh,.... Go to the Edlebrock website, 'n find their resourse manuals,....
Their pdf on the Carter clone is like the Bible of that carb,....
 
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