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Pontoon Boat nose dives while going

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Pontoon Boat nose dives while going


Kelly Beggs

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6/6/2005 5:33:54 AM


A friend of ours' pontoon boat did a nose dive while it was running in the water. It was going at an average speed of approximately 12 mph. There was some Sea Doo's that came along that created waves. Just alittle bit of the waves came on board and the whole boat did a nose dive into the water. It sank about 10 feet and then popped up after a few seconds. They all had life jackets on and were very shaken up. My question is How can this happen with just a little bit of water that came in. We own a pontoon boat and now I'm freaked out for my small children. Has anyone ever had this problem happen or heard of it happening? How can prevent it from happening to us?


Jason D
4/29/2009 2:04:42 PM
Post Email: jason@americananchor.com
Subject: Pontoon nose diving

There can be several reasons for a pontoon nose dive situation. The most common factor is when there is too much load in the front of the boat, yes most boats are rated at higher capacities than in the past, but when more people shift to the front of the pontoon it can produce nose diving especially with a wave from another watercraft. Another reason can be water inside the pontoons themselves, which can usually be drained and tested from the plugs in the back of the tubes. Some manufacturers baffle and compartmentize the "logs" and removing the back plug won't completely drain the tube. Some older tubes only have plugs on top and are not able to be drained. Most pontoon dealerships have the tools and welders to install drain plugs if needed or at least can test the tubes to find the leaks. Simple inspections of the tubes while on trailers can indicate dented, broken weld problems. I have seen on occasion some models that just do not have a good center of gravity and have to be taken back to the manufacturer for setting the deck farther back on the tubes. Some manufacturers will also make a pony tube to be installed in the front of the bottom of the boat to give extra buoyancy in the bow area to prevent nosediving. It also looks like you have a triple tube even though it is not a true triple pontoon. In closing I would have to say that most newer models with 23 to 27 inch diameter tubes have much less to nill problems with nosediving. The older pontoons (dating from the 90's back) have 19-23 inch diameter tubes depending on model and manufacturer. Last but not least, don't be too afraid, the only way to sink is to put holes in both tubes. Hopefully this helps, good luck.
8/7/2007 4:27:16 PM
Post Email: schroeder1959@grics.net
Subject: Pontoon Nose Dive

Hello, I just purchased a brand new LOWE pontoon boat last week, and this weekend during its second voyage, we got the surprise of our lives. We slowed down to wave a some local boaters, and when we did, the front just dove under water. I slammed it into reverse and everyone it the front scrambled toward the rear and all was well, except for the river water on my brand new carpet. At least we all were safe. I thought the boat was balanced pretty well, but I guess I was wrong. We slowed from about 15mph to about MPH when this happened. Should I have trimmed the motor up when I slow down??? Please give ideas to prevent this from happening again. Thanks! Mike

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All Contents Copyright (c) 2017 Bongiovanni Research & Technology, Inc.