Good Evening from Toledo Bend,

On a 1989 DT150 Suzuki with single plug heads the audio is Beep, Beep, Beep, at around 3200 Rpm on up. Below that Rpm it quits. Is this the oil beeper? The boat had not been run for a few months and my buddies son told him it did it then. The boat belongs to my fishing partner but I used to own it. To make a long story short it smokes okay during the first start. The water pressure is good and the oil tank is topped off. One other thing and that is I changed the little finger size filter on it the latter part of last year and it only has maybe 25 hrs on it since I changed it. Its the filter behind the oil tank on the left side.
Any help would be appreciated.....Don't know if it makes any difference or not but its a short shaft engine also.