How To Determine the Correct Boat Trailer Jack Weight Capacity

Updated 04/21/2020 | Published 10/05/2017

Question:

Im looking to buy a new swivel jack for my 1984/single axel trailer for my Ski Nautique. The boat weighs 2350 pounds, not sure of the trailer weight. Would this be the correct jack to get?

asked by: Brandon S

Expert Reply:

A trailer jack onlys needs to be rated for the tongue weight (TW) of a trailer, not the entire gross trailer weight (GTW). With that being said, the tongue weight of a trailer is typically 10-15% of the gross trailer weight. Therefore your boat trailer will have to weigh more than 12,000 lbs without the boat in order for the weight capacity of the Fulton Bolt-Thru Swivel Marine Jack part # FXP15L to be exceeded.

As long as your boat trailer does not weigh more than 12,000 lbs and the frame of the trailer does not exceed 3" thick x 5" tall then this jack will work well for you. The jack has an 8" wheel and can raise the trailer up to 24-3/4".

I have attached a review video of this jack for you as well.

expert reply by: Conner L

Jim E.

4/20/2020

Looking for appropriate size rolling boat trailer jack. 300 lb tongue weight. Also want one that rolls and maneuvers easily. Thanks

Chris R.

4/21/2020

I really like the etrailer Round # MJ-1500B-DWL for your application. It features a corrosion-resistant zinc finish (perfect for boat trailers) and its dual wheels allow for great stability and maneuverability. Its 1,500 pound capacity is more than enough for your tongue weight.