I just got a brand new Mercury 25 HP that was never used but sat in the garage since 2004.
I took it for a first run on my SIB, but noticed that the water flow was very irregular from the tell tile. It was taking time to start peeing, then for few secs there was a very steady flow, the in turned white, like full of bubbles, then stopped completely.
This thing was repeating at regular intervals, no matter if I was running WOT or just idling. I tried different speeds, but the same result: water was running for about 30 sec, then stopped for 30 sec, then started again.
I know this engine never had the implelor changed, but it was never used either.n
Could anyone give me advice about the issue? Thanks for help