whats the tonge weight 1200LB 21' boat?

[thebrain]

whats the tonge weight 1200LB 21' boat? single axel trailer.

 

[robert graham]

Re: whats the tonge weight 1200LB 21' boat?

The rule of thumb is tongue weight should be about 10% of total weight of rig.

 

[rockyrude]

Re: whats the tonge weight 1200LB 21' boat?

I suspect 1200 lbs is light for that rig, but for 1200 lbs, tongue weight should be 120-180 lbs or 10-15%.

 

[JB]

Re: whats the tonge weight 1200LB 21' boat?

A 21' boat, with outboard, trailer, etc, etc should be a lot closer to 3,000lb

My thumb says 7-10%, but pounding the gonkulator is useless unless the weight is exact.

 

[joewithaboat]

Re: whats the tonge weight 1200LB 21' boat?

Some people will disagree, but i have a boat trailer that has what the trailer manufactures of boat trailers recomend for tongue weight which is 6%. http://www.shorelandr.com/pages/pf_trstep3.htm

General trailer guidlines you will find as high as 15%
I find the most important thing is proper tires at the proper inflation.

My trailer came this way from the manufacturer and is non adjustable without cutting/welding
I have towed it all over the state of Texas and Arkansas at all speeds in all weather conditions with an suv and a pickup and never had a bit of trouble. I have even had an emergency stop or two. Also a blow out at 65mph on a single axle so it was on the rim. Never had a bit of sway.
Your rig may respond different.
Good luck!

 

[H20Rat]

Re: whats the tonge weight 1200LB 21' boat?

My trailer came this way from the manufacturer and is non adjustable without cutting/welding
I have towed it all over the state of Texas and Arkansas at all speeds in all weather conditions with an suv and a pickup and never had a bit of trouble.

Any pics of that trailer? I have to honestly admit I've never seen a single boat trailer that didn't have either an adjustable winch post, or an axle that would easily move (usually both). 99.99% of all boat trailers are not custom made for a particular boat, they are custom FIT for a boat. Having a trailer that isn't adjustable puts it into that .001% category. (which usually is also the 'if you have to ask, you can't afford it category')

But yeah, as you linked, shorelander recommends 5-7%. There are just as many links to other manufacturers that will recommend up to 15%. It all comes down to how the trailer handles. Even something as minor as the size of the tires has an impact. Smaller tires mean lower center of gravity, and less give in the tires. Not as much tongue weight is needed.

 

[JB]

Re: whats the tonge weight 1200LB 21' boat?

I have seen that, but only on trailers custom built to match a particular boat. It would be stupid to manufacture that trailer under any other rule.

 

[joewithaboat]

Re: whats the tonge weight 1200LB 21' boat?

Any pics of that trailer? I have to honestly admit I've never seen a single boat trailer that didn't have either an adjustable winch post, or an axle that would easily move (usually both). 99.99% of all boat trailers are not custom made for a particular boat, they are custom FIT for a boat. Having a trailer that isn't adjustable puts it into that .001% category. (which usually is also the 'if you have to ask, you can't afford it category')

I live in a large metropolitan area, DFW Texas. Boat companies ship in lots of boats with no trailers here and drop them at local custom trailer shops. I guess they are much cheaper to ship sans trailer. They have a lift that straddles the 18 wheeler to remove them quickly and have a large area to store them until trailers are ready. I have been in their fabrication shop before to buy a rim to match mine that was damaged. They have large fixed position jigs to manufacture them amazingly quickly. Then push them strait to the paint booth, for custom mix paint to match the boats. I have seen tons of trailers around here that have fixed winch posts, fixed fenders, and fixed spring eye locations as mine is. In fact i don't think there is a single thing on the trailer that is adjustable, they even weld the bracket on that holds the tongue jack. All that being said its not a perfect trailer, the bunk boards are also fixed and are off front to back with each other and wear uneven. Its not a high $$$ trailer as you implied. It however tows as good or better than any i have had. If you really want pictures i will get you some.:facepalm:

P.S. its a Roadmaster and the model # of the trailer (on the tag of the trailer) is the year and model of my boat

 

[thebrain]

Re: whats the tonge weight 1200LB 21' boat?

boat and engine are aproshemently 1200LB anchors, rods and gear add 100LB guess trailer to be another 100LB total 1400LB which is light for a boat this size 21'

edit: I usalley have the gear, anchors ect over axels and toward the rear of boat to reduce tonuge weight.

I have a simiarl 15' boat *pictured in signature) and am in research stage for a larger boat possiably the blue boat.

Edit when I replaced my current boats trailer (boat weight 495LB) I had a choice of 2 trailers
1. rated at 600lb
2. rated at 900LB

opted for the 600LB was told that the 900LB would bounce to much, that being said are trailers rating ingraved on it's frame?

heres an example image of the boat I'm concidering minus the TTop

By stevethebrain at 2011-11-01

Thanks STB

 

[GA_Boater]

Re: whats the tonge weight 1200LB 21' boat?

Brain - I think you are seriously underestimating the weight. A 2007 MR 2100 boat only is 1655 lbs. I used the 2007 fishing brochure stickied in the Starcraft section. Trailer is way over 100 lbs, more like 3-400, if not more. Still have to add motor/fuel/gear. Average towing weight is listed at 3615 lbs. Look at the brochures to get an idea. You might be surprised.

 

[roscoe]

Re: whats the tonge weight 1200LB 21' boat?

I've got an older 18' Starcraft Mariner center console, hull is 900, with a 75 hp, I am at 1800 gross rolling down the road.

Have it all on a 2600# trailer.

Old rig was an 18' Starcraft SS, was 1850 gross.

A 1990 Starcraft Mariner 22' has a hull wt of 1300.


With any of these, 125 - 175# on the tongue should be good.

 

[joewithaboat]

Re: whats the tonge weight 1200LB 21' boat?

But yeah, as you linked, shorelander recommends 5-7%. There are just as many links to other manufacturers that will recommend up to 15%. It all comes down to how the trailer handles. Even something as minor as the size of the tires has an impact. Smaller tires mean lower center of gravity, and less give in the tires. Not as much tongue weight is needed.

As folks have said before you can find anything on the net to back up your position if you look long enough.... but, I have yet to see a boat trailer company recommend anything over 10%.

One of the great things about having a smallish boat like the bowrider i have is that it is easy to load /unload and maneuver around in my shop or garage after being unhooked. I cant imagine having 510 lbs of tongue weight to move around as your 15% would dictate.

My father alwayshad a boat when i was growing up. They were 15-21 foot i/o or o/b and his twisted driveway and garage location made it all but impossible to back all the way to the garage. So we always hand maneuvered them. They never had that much weight on the tongues & towed fine.

 

[Texasmark]

Re: whats the tonge weight 1200LB 21' boat?

Too little tongue and going down hill and or hitting a bridge at the bottom can throw your trailer into immediate convulsions. I have seen one on the back of a p/u on an Interstate Hwy, swing from hitting the truck rear fenders on one side to swinging all the way over and smashing the other side and back before the driver could get it under control.....happened in a heartbeat, I mean a heartbeat.

If the tongue is too heavy on a lightly sprung tow vehicle it may make the rear of the vehicle sag so much that it becomes unsafe.

Most class II trailer hitches are good for 500# tongue and 5000# tow weight. Personally, I like a lot of tongue weight, not 500# but a couple hundred on my little boat because there is absolutely no way I want a runaway trailer behind me. The other thing it does is reduce the reaction when a semi passes you and sucks the boat over towards the hammer lane and when past you turns it loose and it tries to make it to the ditch and then bobs it's way back to normality. BTDT Very scary.

My 2c,
Mark

 

[thebrain]

Re: whats the tonge weight 1200LB 21' boat?

Too little tongue and going down hill and or hitting a bridge at the bottom can throw your trailer into immediate convulsions. I have seen one on the back of a p/u on an Interstate Hwy, swing from hitting the truck rear fenders on one side to swinging all the way over and smashing the other side and back before the driver could get it under control.....happened in a heartbeat, I mean a heartbeat.

If the tongue is too heavy on a lightly sprung tow vehicle it may make the rear of the vehicle sag so much that it becomes unsafe.

Most class II trailer hitches are good for 500# tongue and 5000# tow weight. Personally, I like a lot of tongue weight, not 500# but a couple hundred on my little boat because there is absolutely no way I want a runaway trailer behind me. The other thing it does is reduce the reaction when a semi passes you and sucks the boat over towards the hammer lane and when past you turns it loose and it tries to make it to the ditch and then bobs it's way back to normality. BTDT Very scary.

My 2c,
Mark

Brain - I think you are seriously underestimating the weight. A 2007 MR 2100 boat only is 1655 lbs. I used the 2007 fishing brochure stickied in the Starcraft section. Trailer is way over 100 lbs, more like 3-400, if not more. Still have to add motor/fuel/gear. Average towing weight is listed at 3615 lbs. Look at the brochures to get an idea. You might be surprised.

I'm only concidering 1989 or older models I beleive them to weight 900LBs. engine to be 300LBs thought the trailer would be 100LB maybe 200LB.
yes you are correct the new SC 21' have gotton up to 1700Lbss defeating the purpose of the alumimin concept.

By stevethebrain at 2011-11-02

I've got an older 18' Starcraft Mariner center console, hull is 900, with a 75 hp, I am at 1800 gross rolling down the road.

Have it all on a 2600# trailer.

Old rig was an 18' Starcraft SS, was 1850 gross.

A 1990 Starcraft Mariner 22' has a hull wt of 1300.


With any of these, 125 - 175# on the tongue should be good.

it's surprising how the SC differ in wieght. I plan a few weight reductions on this type of boat like ditching the wooden casting stand.

 

[roscoe]

Re: whats the tonge weight 1200LB 21' boat?

Severely under estimating the weights.

All the hull weights are available on NADA.com website. Trailer weights are on the manufacturers websites, like Karavantrailers.com

A typical roller trailer for a 21' boat will weigh 700-750#

Any 90 hp motor or larger will be 300#

A single battery, 50#, fuel 100#.

Don't for get anchors, rode, lines, electronics, controls, tackle, extinguisher, pfd's, cooler.

If you can get that rig. rolling down the road less than 2400, I'd be surprised.

 

[joewithaboat]

Re: whats the tonge weight 1200LB 21' boat?

Any pics of that trailer? I have to honestly admit I've never seen a single boat trailer that didn't have either an adjustable winch post, or an axle that would easily move (usually both). 99.99% of all boat trailers are not custom made for a particular boat, they are custom FIT for a boat. Having a trailer that isn't adjustable puts it into that .001% category. (which usually is also the 'if you have to ask, you can't afford it category')

Smokingcrater,

Here are those pictures you requested. Let me know if you need some more.
I'm not sure where you are from but around here more bowriders are on these type trailers (non adjustable) than not.

Thanks, Joe

 

[thebrain]

Re: whats the tonge weight 1200LB 21' boat?

Too little tongue and going down hill and or hitting a bridge at the bottom can throw your trailer into immediate convulsions. I have seen one on the back of a p/u on an Interstate Hwy, swing from hitting the truck rear fenders on one side to swinging all the way over and smashing the other side and back before the driver could get it under control.....happened in a heartbeat, I mean a heartbeat.

If the tongue is too heavy on a lightly sprung tow vehicle it may make the rear of the vehicle sag so much that it becomes unsafe.

Most class II trailer hitches are good for 500# tongue and 5000# tow weight. Personally, I like a lot of tongue weight, not 500# but a couple hundred on my little boat because there is absolutely no way I want a runaway trailer behind me. The other thing it does is reduce the reaction when a semi passes you and sucks the boat over towards the hammer lane and when past you turns it loose and it tries to make it to the ditch and then bobs it's way back to normality. BTDT Very scary.

My 2c,
Mark

Mark good infor. everyone here should know image of a boat (NBs boat) either on the wronge size trailer or just not far enought onto trailer.

By stevethebrain at 2011-11-03

this will create to little tonge wieght like in you'r explaination.

same boat correctly on trailer

By stevethebrain at 2011-11-03

Severely under estimating the weights.

All the hull weights are available on NADA.com website. Trailer weights are on the manufacturers websites, like Karavantrailers.com Rosco so I can't go by the weights published in the SC brochure?

A typical roller trailer for a 21' boat will weigh 700-750#it's hard to believe this trailer is that heavy remember I'm in a reasearch stage for a larger boat and getting advice from the experts, this SC 21' maybe more than I expected towing 300 miles one way every September hard to beleive this trailer is 700+LBs

Any 90 hp motor or larger will be 300#

A single battery, 50#, fuel 100#. well the fuel will added to the equation at arrivale so at least I can minus fuel weight of 6LBs per gallon I believe this boat requires 2 batterys?

Don't for get anchors, rode, lines, electronics, controls, tackle, extinguisher, pfd's, cooler.

If you can get that rig. rolling down the road less than 2400, I'd be surprised.

the weight is blowing my mind after reading the brochsures hull weight and doing gear calculations. Thanks STB

 

[bnicov]

Re: whats the tonge weight 1200LB 21' boat?

Yes, the weight adds up pretty quickly. As a very general rule of thumb, your tongue weight is about 10% of the total weight of your boat trailer and gear. A 21ft'r loaded has to be pushing 2200-2500lbs PLUS THE TRAILER.

 

[joewithaboat]

Re: whats the tonge weight 1200LB 21' boat?

Yes, the weight adds up pretty quickly. As a very general rule of thumb, your tongue weight is about 10% of the total weight of your boat trailer and gear. A 21ft'r loaded has to be pushing 2200-2500lbs PLUS THE TRAILER.

I have never owned one ^^^^ but i do own a 2,500lb boat. The only way you are going to get a 21 foot alum open concept o/b boat to weigh that much is to have an awful lot of gear in it.

 

[roscoe]

Re: whats the tonge weight 1200LB 21' boat?

All the hull weights are available on NADA.com website. Trailer weights are on the manufacturers websites, like Karavantrailers.com Rosco so I can't go by the weights published in the SC brochure?


Sure you can. But the weights change from year to year, and model to model.

Easier to look them up on NADA than to try to dig up brochures from 25 years ago.

Different years and models are made with more or less freeboard, wider or narrower beam, different interiors, along with different sub-flooring.


Here is a link to Karavan trailer spec sheet for their roller trailers.
you will have to use the zoom feature on your computer.

http://www.karavantrailers.com/spec_sheet.cfm?photo=kk_roller.jpg


Going with a bunk trailer will save 100#.