Listing boat

cgoodwin1

Recruit
Joined
Jun 22, 2002
Messages
3
I have just purchased a 1988 Bayliner Cobra fitted with a OMC Chevy 350 (5.7) and the OMC Cobra outdrive. While sitting she is level but once moving she lists to the port. The boat is not fitted with trim tabs and I am not sure if this outdrive has a counterbalance skeg or not.... Any andice PLEASE!!!
 

cgoodwin1

Recruit
Joined
Jun 22, 2002
Messages
3
Re: Listing boat

Love your signature, appropriate in the current political situation and the infringment of civil liberties in the name of "security", come to think of it the SS was estabilished to control threats against Germany was it not....<br /><br />Well I read the file but it does not seem to offer a cure? What about trim tabs, I know they are expensive, but they say they will imporve milage as well as performance.
 

suzukidave

Petty Officer 1st Class
Joined
Jul 1, 2000
Messages
387
Re: Listing boat

I'd be surprised if your outdrive did not have an adjustable skeg fin. This may reduce the problem. If not, I fixed it on my little 16' deep v by fitting "Smart tabs" made by Nauticus (they have a web site). They are a small pair of non-mechanical trim tabs (self-levelling gas shocks) that have no upkeep and cost under $150 a set. <br /><br />Before I fitted them I had a persistent list to port with me alone, and all kinds of trim problems with loads. Now, no list even with uneven load. Plus it made a huge difference to stability, the boat cuts waves better and pounds less, turns sharper, stays on plane and at speed in turns, allowed me to trim out the motor and even sped me up overall. I am pleased :cool:
 

Boatist

Rear Admiral
Joined
Apr 22, 2002
Messages
4,552
Re: Listing boat

Chris<br />All boats will lean into a cross wind or if anything causes boat to turn one way or the other and you correct with motor will lean. If the motor trim tab is adjusted correctly, at speed turns both ways with equal pressure then I would check hull for anything that can create drag on one side. Upper deck also anything that will catch wind on one side. When change to a different prop in most cases will need to adjust motor trim tab.<br /><br />As far as trim tabs go, it is best thing I ever installed on my boat but they really cost you fuel mileage not inprove it, with one exception. I strongly reccomend the hydrolic ones by bennett or something like them. All trim tabs raise the stern and force the bow down. This means a better ride and you can control any listing, but the bow down also means more wetted surface or a small decrease in fuel mileage. The one place that they will improve fuel mileage is if for some reason you can not run fast enough to get up on plane without trim tabs but can with trim tabs then that will improve mileage. Like on my boat out to sea with the trim tab all the way off my boat will come up on plane at 18 miles per hour, but many times too rough to run 18 mph offshore. With the trim all the way down will plane at 10 mph. At 10 mph up on plane I get much better mileage then at 10 mph plowing. Good luck and let us know what you find.
 

rdmoore

Cadet
Joined
Jun 9, 2003
Messages
14
Re: Listing boat

In regards to the comment about trying smart tabs.<br />True Story. A few years back , I was looking for a smaller boat than my<br />Four Winns cuddy, mainly for taking the family out on small lakes for water<br />skiing and tubing. After looking around a bit, I purchased a Stingray 180<br />RX bowrider. It seemed to meet our space and performance needs and seemed<br />like a real value for it's cost. And it was, except for one glaring fault.<br />At anything less that W.O.T and speeds below 35-40, it would porpoise<br />horribly unless you kept the trim fully down. Because you had to drive with<br />bow always plowing the water, instead of planing as it was designed to,<br />cornering was very unpredictable, gas mileage suffered and handling in<br />general was poor. It got to be so bad, my wife refused to drive it when I<br />wanted to ski. Having owned many other boats that you could trim at any<br />speed (once on plane), I knew this was not correct and tried to work with<br />first my dealer, then Stingray the company, to get this corrected. To make<br />a long story short, lets just say they both were an absolute joke. All I<br />had to show for months of effort of trying to go through the proper<br />channels, was countless unanswered phone calls and e-mails, wasted trips to<br />the dealer, money wasted on another prop, a lot of frustration and the<br />first hand knowledge (after trying other 18 & 19 foot Stingrays out) is<br />that they all porpoise just as badly! Many other disgruntled owners had<br />also contacted me with this same issue, after I started asking for help on<br />various boating forums. But just as I was convinced this is a flaw in the<br />design and was putting the boat up for sale, I learned of the smart tabs<br />from Nauticus. I contacted the company, who was very helpful and promised<br />they would completely fix my porpoising problem. After all I had gone<br />through with the shallow answers and promises from my dealer and Stingray,<br />I was extremely skeptical, but I went ahead and ordered a set, figuring it<br />was a lot cheaper than buying another boat. Got them a few days later and<br />installed them in about an hour.<br />Let's just say the results were far beyond my highest hopes. There is<br />absolutely no more porpoising. None whatsoever, no matter what speed or<br />trim the motor is at. Additional benefits are that the thing planes almost<br />instantly, it virtually doesn't even lift the bow at all! You feel like<br />you're in a car, not a boat when you take off! Because of this the hole<br />shot improvement is amazing. Heavy slalom skiers I could not pull out of<br />the water previously, now are no problem. Gas mileage is improved and the<br />thing corners predictably and rides much better. I even called the owner of<br />the company and thanked him personally. That was 2 years ago, and I can<br />truly say I am now 100% satisfied with this same boat I was so disgusted<br />with before the smart tabs installation, and can't even imagining using it<br />without the smart tabs. I hear so much about boaters looking for<br />performance improvements with expensive engine and prop modifications, <br />or complicated hydraulic or electric trim tabs, <br />when they could just add a set of these and get better performance<br />improvements (except top speed, that was not affected) at a fraction of the<br />cost. Several of my boating friend have installed them after they heard of<br />my success, with similar positive results. So go ahead and give them a try,<br />you won't regret it. Feel free to e-mail me if you have any questions.
 
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