What should the idle rpms be for Johnson 1994 J225STLERK. Seems like it used to idle at 700 or so. Just came back from the shop. The mechanic replaced the spark advance and set the idle and told me all was good. But I just fired it up in the driveway and its idling at 1400. Seems high. Should I try to adjust it or wait til I run it at the lake this weekend. I let it run for a good while but the rpms didn't drop. I thought these motors idled high until they warmed up and then dropped down automatically.