Getting that idel down to 650 rpm.

[doral1985]

84 OMC 3.8L 2 barrel carb.
Would like to get the idel down to 650, with idel screw turned below the idel 800 rpm engine dies, I want to adjust the screws at front bottom of carb but they are pretty much blocked from accessing by the the thermostat housing, even a flex driver dosent seem to work, any bright ideas how to adjust these?

 

[cr2k]

Re: Getting that idel down to 650 rpm.

Either a very long thin screwdriver (watch out for the alt fan) or one of the idle adjustment tools $$

 

[floattest]

Re: Getting that idel down to 650 rpm.

I made my own. using a hex driver from a little multi tool screwdriver I pressed a small piece of hardwood on the drive end and came up with a tool that is about 2 inches long to fit in between carby and thermo housing.

I've actually done this twice now, one carb I had, the screws were flats, like an oval shape, damned if I could find even on tool to fit, had to dremel out a hex driver to fit.

Then my other carb the screws are hex shaped. sheesh.

I keep scratching my head and wonder why these screws can't simply have slots in them like so many other screws in the world.

 

[doral1985]

Re: Getting that idel down to 650 rpm.

Good idea Floattest, not sure what head type they have, can barely see them, I have two one for each barrel, the one on the right is really hard to get at. I may use your method.
Tks for info.