Mikuni Carb factory settings SAS-2 screw missing,

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03-12-2019, 03:37 AM
Crammin1280

Mikuni Carb factory settings SAS-2 screw missing,

1988 2.0 2wd had A/C was removed before I got it
was driving around 70 t0 80 when the throttle stuck and revved at high rpm, I found out actually the spring was catching, thought it was the throttle cable sticking. Thought it fucked the engine cause I heard this knocking and pinging, thought it jumped time, redid that, got too the carb cause was eating a lot of gas for 4 banger, yeah I drive over 55. Too the point I see the sas2 screw missing , book says Impossible to ever get perfect adjustment ever again, I am not buying a Weber I want it back to where it was before so I can sell it, thought I had it close was driving good in a freeway slowed down on a ramp blew the fucking muffler wide open, I need a picture of anyone’s. SAS2 and 3 screws I need just a slight point of reference cause I have none, why would they make a screw adjustable when it’s not supposed to be touched after the factory? I wanna love this little truck it was nice got from an old timer they only flat towed it behind their rv under 100k miles,
03-12-2019, 11:16 AM
FMS88

4 Attachment(s)

Greetings and welcome to the forum. Here are pics of the SAS-3, SAS-2 and fast idle screws on two spare carbs I have for a truck with a manual trans and no A/C. The SAS-2 screw is in the middle.
Attachment 22015 Attachment 22016
Like the other adjustment screws, the SAS-2 screws on the carbs I have use a spring to hold their position instead of a lock nut as illustrated below. Also, here's instructions for adjusting and setting the carb. The SAS-2 adjustment procedure is #4.
Attachment 22017 Attachment 22018

Hope this helps
03-12-2019, 02:23 PM
geezer101

This is exactly what you need (is there a specific post in the tech section on this?) Notice that the pics are from 2 different carbs and all the stop screws are not set the same. I tried to find this last night but kept getting images of older Solex carbs...
03-12-2019, 03:50 PM
FMS88

1 Attachment(s)

Quote:

Originally Posted by geezer101

(is there a specific post in the tech section on this?)

This is the publication for the Gen2 Mikuni carburetors from which I pulled the illustration and procedure pages above.
Attachment 22019

Found it years ago on e-Bay. It's not perfect, but it has far better and more thorough illustrations, descriptions and easy to follow procedures than the shop manual. It also doesn't suffer from the annoying and confusing editing errors that afflict the shop manual.