First thing I'd do is spray some oil on the throttle shafts while the
engine is idling. If it slows way down the shafts are worn and the
reason it idles so fast is that they let air in under the throttle
butterflies. If this is so, you may as well leave 'em alone until
you're ready to replace the shafts. Otherwise, find the idle speed
screws and back them out equally to reduce the idle speed.
/// email@example.com mailing list
/// (If they are dupes, this trailer may also catch them.)