Carb jet information required.
Posted: Sun Apr 03, 2022 2:28 am
Hello all.
I am unable to post in the tech section, so I'll just post a lead here and hope for the best.
Just wondering if anyone here has some information on the jetting for a carb?
I'll add a little bit more here. I do not have a Gemini, but an Isuzu Trooper, 1983, with a G-200 lump in it. The carb is a twin barrel affair, you are all probably pretty familiar with it, I am guessing. Recently, to pass some emissions test, some fellow in a work ship fiddled around with the jetting, because he had an emissions test rig. The jets he changed were not the main jets, but the ones on the top of the body, just inside the intake (round about where that idle solenoid is, you know). He replaced one that was a blind jet with one that is open, presumably to weaken the mixture. But he lost the original blind jet he took out. The problem, the mixture , despite passing the test, is FAR too weak for normal use, and the plugs overheat after 15 minutes driving, which means I have to pull over and switch off until the engine cools again (actually, it cuts out itself, as you would expect, when they get too hot).
Now, does anyone know, or has a diagram of, ALL the jet sizes for this carb? If you think you might have, but need more information, I can post a picture of the carb.
Thanks!
I am unable to post in the tech section, so I'll just post a lead here and hope for the best.
Just wondering if anyone here has some information on the jetting for a carb?
I'll add a little bit more here. I do not have a Gemini, but an Isuzu Trooper, 1983, with a G-200 lump in it. The carb is a twin barrel affair, you are all probably pretty familiar with it, I am guessing. Recently, to pass some emissions test, some fellow in a work ship fiddled around with the jetting, because he had an emissions test rig. The jets he changed were not the main jets, but the ones on the top of the body, just inside the intake (round about where that idle solenoid is, you know). He replaced one that was a blind jet with one that is open, presumably to weaken the mixture. But he lost the original blind jet he took out. The problem, the mixture , despite passing the test, is FAR too weak for normal use, and the plugs overheat after 15 minutes driving, which means I have to pull over and switch off until the engine cools again (actually, it cuts out itself, as you would expect, when they get too hot).
Now, does anyone know, or has a diagram of, ALL the jet sizes for this carb? If you think you might have, but need more information, I can post a picture of the carb.
Thanks!