Keith Atlanta

I did this...

I bought a Polylift that was undersized and strapped 2 other tanks to the bottom of it. I think the trailer is actually way overbuilt and adds too much weight. Look at your typical lift, its 3-4 pieces of angle to hold the tanks together and a few pieces to hold the bunks.

Big question, how long is your boat?
What does it weigh?

dereknkathy

that replacement blower is more like a leaf blower than an air compressor. i think you will find it agonizingly slow to raise-lower. they are using big air passages and less than 1 atmosphere of pressure to move the water out fast. try plumbing 1 barrel and see how long it takes to float it and figure how many barrels will float your boat.

iliveonanisland

Boat 6500 lbs, trailer im guessing 750/800 without suspension axles etc.... i can go 4 wide on the 55 gallon drums... i will look at more lifts to get an idea of the volume i will need. i was thinking 3 55 drums wide except the rear go 4 wide due to the weight of the twin 300 rudes...

iliveonanisland

32 ft 34 with i think armstromg offshore setback mount,

Its a manta 32 cc, WAY lighter than my mistress with 572s and 3s

Keith Atlanta

Just do some simple calculations on volume.

http://www.polylift.com/new-boat-lifts.html

For what its worth, you can eyeball these on the polylift site and get really close. Your hardest thing will be getting all the drums to get equal air.

If youve had a lift like this you know they run for 10-15 minutes and the boat barely gets out of the water then all of a sudden they POP up.

iliveonanisland

i build all kinds of stuff myself, ive had my airproducts 200 amp mig/tig/stick welder 25 years

as soon as i build my jettys to protect the area where im putting it...

the other boat lifts i see have three long plastic tanks under them about the diameter of a. Free 55 gallin drom lol... i bet it costs about a grand including paint.

I built a car trailer in a week with one worker to cut steel and hand it to me to weld up.... once all tacked up had him finish welding it together...

Speedracer29

How many old pontoons are in Columbia? Seems like it'd be a lot easier to plumb and attach to the trailer... Double the toons, plumb into some bungs (that a lot of them already have), use the galvanized cross bars to bolt to the trailer.

iliveonanisland

I want it to last 20 years so i think im better off going thicker bigger steel for the back bone so even with corrosion i have lots of material thickness left and go wider for more stability 4 drums wide i can stick and extra two drums in the rear with individual valvse so i will only fill the rear drums i need

iliveonanisland

If i have the same number of drums under it front to rear the lift should float the with the boat on it at the same attitude it has when just sitting in fhe water correct

iliveonanisland

I have seen two in the five years ive been here so not an option