I'm in the middle of doing the same thing. Just go to trailer store and tell them you want everything for a tandem axle trailer XX axle width, minus 1 axle.
The centerline where the axle sits now will be the centerline for the equalizer in a tandem setup. Stringline from the ball rather than trying to square from the trailer frame to insure it trails straight.

 

Dtrainer did this yesterday. Pm him for details but I think he got all new parts for under a grand.

 

should be some junker trailers around like yours i had 2 junkers and built mine from then took a torsion running gear axel from a fold up camper trailer and added a third axel .belive it was an apache camper trailer also a junker.

 

I just did mine this weekend. It only took 1 1/2 days to totally redo it.. Bunks, lights, axles, paint, and all. I ordered all my stuff from trailerpart.com. It was $480 for axle, tandem hanger kit, springs, and new tires/rims and delivered. Bought 2 diamond plate fenders locally for $100.

 

I just did mine this weekend. It only took 1 1/2 days to totally redo it.. Bunks, lights, axles, paint, and all. I ordered all my stuff from trailerpart.com. It was $480 for axle, tandem hanger kit, springs, and new tires/rims and delivered. Bought 2 diamond plate fenders locally for $100.
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I hope you put plastic slides on those treated 4x6s because they will eat a hole in your boat.
BTW nice looking rig.

 

^^^^ x 2 .... The paint on the bottom will help slow it down, but the chemicals in that treated wood are highly corrosive to aluminum.

 

Yeah I put bunk carpet on em. And put slicks on the back.

 

I've got a new Lowe 2070 and it came with a single axle and I've went through 3 sets of tires in one season! I kept taking it back and all they did was put more tires on it. "Warranty bs". I've contacted the trailer company and they are sending everything to upgrade to a tandom. Except wheels. I've already bought some nice wheels for it.

 

Before and so far. I will be happy knowing if I have a blowout my boat shouldn't jerk me out of the road.

 

650.00 total. Springs, axle, hubs, fenders, equilizers and all hardware also shipping.

 

^ Thats all it cost was 650.00? I am looking at doing this too. I just have an 1860 but I have been blowing through tires and hubs. She is a heavy old bird.

 

Yes, that's a complete bolt on setup directly from the factory using my existing axle. Should be here this week. I'll post the finished project when it's done.

 

My boat package is 2480lbs counting trailer on a truck scale. That's without my platform and stuff

 

Thanks Jenk for the help... I just decided to order a new set of axles so I had a matching set... 4 new springs - 2 complete wheels and tires - hanger set - hubs - bearing protectors - u -bolds and hardware shipped $720.00

 

Good deal...u otta be in good shape! Post us some pics when u get her done.

 

That's a steal. I just priced out a new tandem trailer. $5800 after taxes and license. Oof!!!

 

forsure scott... a tandem ez-loader vs single axle was like a 2300.00 upgrade... when I had Chuck build my widow maker sled he had a local shop build my trailer... I loved that trailer was well thought out and over built... and it was cheap vs these mass produced trailers....

 

There are some guys building some awesome custom trailers in Seattle.... The hunt for a good deal is on!!!

 

saw some sweet tandem trailers on ebay today... the prices were very good...

 

I've burned through 2 hubs and 3 sets of tires on my single axle(which is now listed in the classifieds!!). Got a used tandem for $500!

 

The Dealer told me
"Used Tandems are like Unicorns......Only found in Fairytales".

 

Oh they're out there, free ones also...ok so it looks like it was free but what a huge difference it made goin tandem! I was going through tires with the stock single axle and that was some scary driving over the pass each time! You will all be very happy with this change.

 

Found one on craigslist that might fit your boat.
https://seattle.craigslist.org/oly/boa/4366558760.html

 

Jenk, that is an awesome job on the trailer. Looks like it rolled off the lot like that! :tu:

 

Thanks!

 

Im doing a total trailer mod and dual axles look at ******* trailer supply

 

Well I put my tandom in last night. Simple install. Only took about 2hours.

 

That looks great!!

 

I would recommend, just go to a boating supplier and get the bolt on kit. It is a pre fab unit, galvanized, and will bolt on wherever. The main uprgade would be stainless shackles. Those are the wear parts.

 

http://www.championtrailers.com/89-3500-tandem-trailer-parts-kit-545/
Here is the kit I went with under my airboat. It's awesome. And you can get it all shipped to you for under 500

 

This is my trailer after adding the dual. I love have a tandem. Helps a ton with Peice of mind and towing

 

Got my trailer set up as a tandem Friday night... still need to add fenders and adjust my bunks to put more of the weight on the back... I think I might be a tad to tongue heave and my hitch height is to low...

 

Lookin good!

 

Thanks for your Help Jenks... I should have turned my nuts to the outside so I could keep a eye on them to make sure nothing is backing out... so far so good... found the torque specs for everything on axle manufacture site... also fixed my level equalizer problem with a strait hitch which I should have had in the first place since my trailer was never level... still think my tongue weight is too much and should have checked that before hung my equalizer hanger because I could have moved everything forward 3 in... now I need to build new bunks... this stuff never ends...lol...

Jake

 

What did u end up doing with the boat... I mean to get it off the trailer?

 

How about the fenders? What did u end up going with?

 

haven't yet... I was going to stop buy a few places and try to find a set you have... figured I will have to weld up some brackets and some side steps... I might even make some jet boat fender guide on's...

Jake