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Smart Tabs added to the Bayliner
Submitted By: Mark42
Date Created: 06-05-2010
Description: After adding the permanent fuel tank in the rear, and the hard top, and some other changes, the Bayliner has a distinct tendency to porpoise when four adults are in the boat due to the extra weight being concentrated in the back half of the boat. It also tends to drag the swim step when trying to get on plane, which causes a considerable amount of water to be thrown against the side of the outboard motor cowl and bounce back into the boat. It also is taking much longer to get on plane.

The solution is to add Trim Tabs. Trim Tabs will lift the aft of the boat, help it get on plane faster, and eliminate porpoising by giving the bow more downward force.

I chose Smart Tabs brand trim tabs because they have a very good reputation when it comes to correcting bad handling in smaller boats.

The result is that the boat handles much better than before the Smart Tabs were installed. It gets on plane easily even with a full load, cruises level, and doesn't porpoise after hitting repeated wake waves. Even low speed "no wake" speeds were improved because the tabs eliminated low speed wander that is common with deep V hulls.

This is how the install went.
Related Projects: 1985 Bayliner 1600 Capri Cuddy Cabin
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    Marine Vinyl Decking - Nautolex Deco Dot Install
    (Smart Tabs added to the Bayliner)
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Tools / Materials: Go to the Boating Store


Right out of the box.
This is the contents of the Smart Tabs package. The tabs, brackets, struts, hardware and instructions. The tabs are much thicker and substantial that I expected.

This is the transom before adding the trim tabs.
Transom Before


Test Fit
Using duct tape in a loop, the tabs were stuck on to check for clearance issues.

Measured, apply masking tape, marked and drilled holes for the hardware. Note tape on drill bit as depth gauge.
Drill Holes


Look! No gel coat chipping!
This is why masking tape is used. Gel Coat does not chip when drilled through masking tape.

The holes were filled with a dab of 3M 4200 sealer. Very important! Water is to be kept out of the transom at all costs!
Seal Holes


Bracket mounted
Kit comes with nice stainless steel screws.

The top bracket falls behind the swim step, and makes it impossible to drill the screw holes. Tried to remove the swim step, but it became more involved than I wanted, plus the holes would have to be sealed again, so I chose another method of getting access to drill the screw holes
Top Braket Marked


Access Holes
Drilled two 3/8" holes in the skirt of the swim step, then used a 12" long bit through the access holes to drill into the transom. Worked like a charm.

Much easier than removing the swim step.
Drilling through Access Holes


Mounted Top Bracket
Mounted the top bracket, and tightened the screws using a Phillips bit in a small socket wrench.

Once the Starboard side was done, it was easy to do the port side with no obstructions.
Working on Port side


Done.
Took all of 15 minutes to mount the port side, compared to an hour and a half to do the Starboard side with the swim step in the way.

Now its off to the water and test them out.
Full View


Another View
Below Swim Step view.

This photo is from testing, but unfortunately, I don't have an action photo. Just me relaxing in the boat.

The 80lbs Actuators were returned for 60 lbs actuators, and all seems well. The problem with the 80 lbs actuators is they were too strong for the weight of my boat. They forced the tabs down even at cruising speed, causing undo splashing and putting a lot of the hull into the water. That caused excessive drag even at the weakest setting.

The 60lbs actuators cruise smoothly, and do provide dampening for choppy water that causes porpoising, but not quite as well as the 80 lbs actuators did. This is the trade off. By changing the settings on the 60 lbs actuators, the boat should perform more like it did with the 80, but not throw water around as much.

All in all, a very good product that greatly improves performance and overall handling.

Trial Review

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