Replacement Jack For A Dorsey Boat Trailer  

I would be happy to help, but I have no way of looking your trailer by the serial number to determine which replacement side mount jack is correct. Based on the picture you provided of the jack on your Dorsey Malibu Boat Trailer a standard bolt on…

I spoke with my contact at Fulton and if your current jack pivots on a 1/2" bolt then you can use either part #FXP10 for a 1,200 lb option or part #FXP15 if you wanted a 1,500 lb option. These come with a bolt on bracket that can fit a 3" x…

A solid replacement jack that I recommend is the Square Jack w/Footplate-Bolt On, Item #MJSQ-2500B. This item is a great marine jack that has a rust-resistant zinc finish and that is built to be flexible and durable. It has a lift capacity of…

Fulton jack #FXP10W0301 is meant to bolt to a specific bracket, #P9012-00. It bolts through the center. This bracket measures 4-1/2 inches by 4-1/4 inches and is meant to be welded on. The holes on the outside of the bracket are to hold the jack when…

I do not see something we carry that would be an exact replacement. If you can give me your jack's model number it would help me find if we have something that will work for you because the replacement mounting brackets match up to certain…

In order to determine the torque rating for the lug nuts on your trailer you will need to know check out the chart I attached that shows all of the torque specs for all the trailer lugs available based on stud size, wheel material and wheel size.

The difference between an load range C and load range D tire in the same size is the capacity and psi rating. The two tires will still have the same dimensions and fit on the same wheel. The D rated tire has a higher capacity. For a ST175/80D13 like…

Since both a ST145/R12 size tire, like the Kenda Karrier S-Trail #AM10130, and a 5.30-12 size tire, like the Kenda K353 #AM10068, fit a 12 inch wheel, a ST145/R12 size tire can replace a 5.30-12 size tire. Keep in mind that these tires do have…

The 5.30-12 tires, being wider, are going to make more contact with the road. This means that the noise, and heat build up will be higher than a 4.80-12 tire but the rolling resistance will actually be less because the tire is larger diameter. The…

Load range B trailer tires are going to have a lower capacity than C load range tires. Basically that, psi rating, and the ply rating are the only differences. A higher load range tire would last a little longer than lower load ranges of the same…

Even though I cannot comment specifically on the grease you used because I am not familiar with it, I can tell you the best grease for trailer bearings is a a grease with a rating of GC-LB, which just means it is made to withstand very high…

Your math is correct in your trailer weight load example. If a fully-loaded tandem axle trailer weighs 4000-lbs then each of the 4 tires will bear 1/4th of that load, or 1000-lbs. In this case a tire rated for 1300-lbs would provide a good safety…