Replacement Leaf Springs for a Pontoon Boat Trailer with Three 3,500 Pound Axles

Updated 08/25/2017 | Published 08/24/2017

Question:

I have 35 ft trailer triple axle w/ 3500LB axles. The springs are 25 1/4, 1 3/4inch wide x 5/16 thick. The boat and trailer weight 9000 lbs. The middle spring is bends concave upwards at one end, ie appears the load is too much for the cheap 3 leaf spring. What springs would you recommend to replace all six springs. Your replacement spring 3 leaf is 3/8 thick as mine are only 5/16inch Also under static load the existing springs are bent flat again indicates they are too weak for the load.

asked by: Burt

Expert Reply:

It does sound like those springs are underrated for your 9,000 pound boat/trailer. The 3-Leaf Double-Eye Spring for 4,000-lb Trailer Axles - 25-1/4" Long Item # e57SR will fit since they have the same length as your existing springs and they are not rated too high to be effective so you are good there too. I have linked a video review of these springs for you.

expert reply by: Michael H