Funny I just saw this thread today after installing the
JBP Mechanical Access Port Riser yesterday evening (bought last year).
I had the issue of the bilge kicking on under throttle a couple years ago, and then this year as well. Each time, it was the first time I ran the boat after winter storage. Last year the bilge was almost always dry. The time a couple years ago, I had the dealer reseal the large tray around its outer edges as well as where the cleanout tubes interface with it (coupled with tightening the tube clamps). Also periodically (re)greasing the rubber plug seals helped as well. However, this year I decided to order
replacement rubber for the plugs and went ahead with the riser installation. Needless to say, after pulling the smaller access port tray with its ten screws, there was barely any silicone from yamaha, so undoubtedly water was just raining down into the bilge after filling up through the cleanout tubes. I figure this should solve my latest water ingress issue for now and minimize any bilge operation. ??
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