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Boat Lift: How Do They Work?

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Old 03-31-2008, 11:31 PM
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Default Boat Lift: How Do They Work?

See link here:

http://www.offshoreonlyclassifieds.c...o21746-en.html

How do they work? electrical motor or air compressor running on 110v? How do you ''tight'' them to the docks? some of them have somekind of sticks going in the water?

I even went on some boat lift company web site, they show their model, the capacity, but I never saw these upclose I don't know if this could fit, or how it could fit in my future slip...

Thanks for any info on those!
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Old 03-31-2008, 11:57 PM
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They use an electrical blower motor or motors depending on how big it is to raise the tanks and then vent them to lower it down...it's a pretty simple and straight forward design...each manufacture goes about it a little differently but they work about the same... they fit them to your boat weight and size and also the slip... I have a First Mate remote control on my Cat rack and it monitors the level and you use a key fob like opening up your car doors to raise it or lower it...its a 12,000 lb lift and has two blowers... they can be set up for pulling in forward or backing in depending on what you want..mines a little tight but fits...lol
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Old 04-01-2008, 12:03 AM
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how do they hold in the slip? bolted to the docks?
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Old 04-01-2008, 12:03 AM
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and how wide are they for performance boats like ours?
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Old 04-01-2008, 12:05 AM
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they bolt on, my slip is 12' wide and the boats 10'-9"..
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Old 04-01-2008, 12:06 AM
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on regular 110 volt?
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Old 04-01-2008, 12:09 AM
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yes...i'm not sure how many amps they draw but I only have a 20 amp circuit on mine and they've never tripped a breaker..
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Old 04-01-2008, 12:10 AM
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thanks for the info. I appreciate!
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Old 04-01-2008, 12:17 AM
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no problem...good luck...
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Old 04-01-2008, 08:54 AM
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It really is quite similar to a shop vac motor and blower, with ball valves to direct the flow of air. (Last I checked, they were 7.3 amp motors, just like an old fashioned shop vac.) There are holes in the bottom of the tanks, and the air hoses are plumbed into the top of the tanks. The shop vac blows air into the tanks, displacing the water out of the bottom holes, and then you shut a ball valve to keep the air in the tank and shut off the shopvac blower. To lower, simply open the ball valve, and gravity pulls the lift down, displacing air out of the hoses in the top of the tanks, and allowing water into the tanks through the holes in the bottom. Takes a few minutes to raise or lower the lift.
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