Reply To: Johnson RDSL-21 mercury Switches

[Don]

OK, sounds good as long as water was mixed with the steamy spray, which is normal for these engines.  This engine might have a “hot light” on the dash which connects to the head with a single tan wire along with a knife connector covered in a rubber sleeve.  On the other hand, the 59 models may not have included this feature.  If your engine is equipped with a hot light, you will want to check to make sure it works.  With the key turned to the “on” position, carefully slide the rubber cover back exposing the knife connection.  Now ground the knife connection to a clean ground on the head or perhaps on one of the head bolts, the hot light should illuminate.