S.L.O.W. problem

[whale]

I have had the S.L.O.W. system kick in on my 1999 Johnson 115 the last two times out. The engine limits me to 2500 rpm. According to my shop manual this is due to an overheat issue on this motor. The first time I thought it was due to low oil but there is plenty of oil now. The Seloc manual for 92-01 Johnson/Evinrude indicates for carbed engines, the S.L.O.W. is only activated for overheat conditions. Also, none of the warning lights or alarm are activated. I have had the temp alarm go off before when the water intake was blocked by weeds.

I ran for a while both times and then the S.L.O.W. kicked in. Today the motor was off for a while for a long drift and after that it ran fine all the way back about 20-30 minutes. The water stream is strong and the water is not hot at all.....just luke warm.

Any advice is much appreciated. I am at a loss...