Originally Posted by 1redTA
what are the temps when it does this? Does it do it when the engine is first started?
The temps hold pretty steady. For the times when the temp guage is working, I notice an immediate spike from 160 where it stays pretty much all the time, to 170 for a few seconds and then it goes back to 160. I was attributing that to the fact that the boat was traveling at operating speed but then suddenly cuts back to 1500 rpm when the "anomaly" kicks in. Not sure though. I first suspected a temp deal because it only does it after the boat has been run for at least 20 minutes, but the dealer says everything with the impellor and water pump check out.