Can a Single Axle Boat Trailer Be Switched From a Slipper Spring Suspension to Double Eye

Question

Question:

I have a boat trailer needing springs.. It is an old ez loader, 2100 lbs trailer, 26inch between bolts, with an open hook at back. Can I replace with the 25 1/4 using shackles? Do you have a complete kit with bolts? Thank you!

asked by: Joe H

0

Expert Reply:

To switch to a Double Eye Spring # e48SR you would need to also change out your Rear Hanger # 30-20 since you will be adding Shackles # K71-358-00. This is required since the rear hanger has to be 1-3/4" wide on the outer versus at least 1-3/4" wide on the inner like you get with a Slipper Spring Hanger # CES83FR for a Slipper Spring # e33SR.

expert reply by: Bud M

0

Joe H.

2/13/2024

Would you recommend staying with the hook end slipper spring? And.. which one do you have that will fit my spacing between bolts? Thank you! Joe

Bud M.

2/16/2024

@JoeH Personally if it were my trailer I would switch to a double eye spring system even though it does mean changing out the hanger. This is because I know how difficult replacement slipper springs can be to find especially in a breakdown situation. If you choose to stick with the slipper style spring the Spring # e33SR looks to be the only size open eye we have that fits your mounting bolts being 26" on center.

Answer 1

We have the 4-Leaf Spring C-Hook Spring, #e33SR, that measures 26-1/2 inches from center of the bolt eye to the edge of the C-hook. See attached picture diagram. Unfortunately, we do not have a spring with only 3 leafs in this style leaf spring.

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Answer 2

A Nylon Bushing #TRBU11561 is not required to be used on the open end of the 4-Leaf Slipper Spring #e33SR. Since the bushing is not going to be fully encased it stands that under the weight of the trailer it will fail and break apart more easily. I…

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Answer 3

It sounds like you already have done the correct center of one eye to the center of the other eye measurement. If your measurement is slightly off, sometimes the leaf spring may still work as leaf springs do expand by as much as 3/4-inch over time.…

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Answer 4

Thanks for the picture! The spring shouldn't hit the frame like yours does in the picture, so the correct solution would be to either add a longer front hanger or using a shorter spring. The correct replacement hanger will be dependent on the…

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Answer 5

Hello Paul, great question. The shackle bolts cannot be tightened too much. There is no torque rating for these bolts because tightening them too much can cause the suspension to bind up. The nuts are to be tightened until the knurled portion of the…

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Answer 6

There is indeed a replacement bushing for the 4-Leaf Slipper Spring w/ Open Eye End for 4,300-lb Trailer Axles - 27" Long #e24SR; the correct part is the following: - Nylon Bushing #TRBU11566

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Answer 7

The Slipper Spring #e33SR referenced in your question is indeed the closest option we have available for a slipper spring that matches the dimensions on your trailer. Slipper springs come in 1-3/4 inch, 2 inch, 2-1/2 inch, and 3 inch widths, so you…

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Answer 8

I did some research and for a 2-inch square axle the rating can be between 2,200 to 3,500 lbs. It sounds like the tag on your trailer axle falls within that range. The 4-Leaf Slipper Spring, part #e33SR you asked about is designed to work with…

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Answer 9

The 4-Leaf Double-Eye Spring for 4,000-lb Trailer Axles - 26" Long #e48SR is a good replacement for your boat trailer as it meets all of the specs and is compatible with an axle that's just a little higher when it comes to weight rating.…

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Answer 10

As they wear, leaf springs tend to flatten out. The first step is to get the correct length of the existing springs. In order to do that, you'll need to put the trailer up on jack stands and measure them (center eye to center of the slipper) with…

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Answer 11

The only open eye 1-3/4" wide leaf springs we currently carry is the etrailer #e24SR & #e33SR. I have no way to verify the weight capacity for your current springs but as it is only a 2" square axle this spring is likely much heavier…

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Answer 12

The best leaf spring for your application is the item #e27SR which matches the 26 inch length you need and has a 4,500 lb capacity. This would have just enough extra capacity that won't fail but also would still flex enough to cushion the ride…

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Can a Single Axle Boat Trailer Be Switched From a Slipper Spring Suspension to Double Eye

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