The problem is on an 89 Forrester with a Johnson V-4 90 HP Outboard.<br />I am hearing a beeping type of sound, I could best describe as a horn that is out of tune, coming from the OMC throttle control box. There is a definite vibration on the throttle control when the noise is heard. I've never heard this before (just got this boat a few weeks ago). It sounds every couple of minutes for a very short time - less than 1 second. Could it be an alarm for the oil tank? If not - any ideas as to what it is?