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Old 24 March 2014, 08:02   #31
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Hi Chunk

I would add a bit more for battery, rigging and electronics. My battery weighs in at over 20kg alone, so I allow 50kg all in.

Most 750kg gross unbraked trailers weigh between about 180-220kg.
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Old 24 March 2014, 09:27   #32
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Extreme, you're probably right. Did the calc for my boat a few months ago after reading an earlier "Am I legal" thread and realised I wasn't.

Didn't worry about it too much until last month when a chap with dementia ran off the pavement in front of my car. I swerved, clipped his ankle and he luckily got away with a clean break. Could've been much worse had I been towing at the time...

Like you I've now gone down the route of braked trailer.
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Old 24 March 2014, 10:49   #33
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Originally Posted by Chunk View Post
Extreme, you're probably right. Did the calc for my boat a few months ago after reading an earlier "Am I legal" thread and realised I wasn't.

Didn't worry about it too much until last month when a chap with dementia ran off the pavement in front of my car. I swerved, clipped his ankle and he luckily got away with a clean break. Could've been much worse had I been towing at the time...

Like you I've now gone down the route of braked trailer.
Wow! Close call. I am more comfortable having an over-specced trailer/axle with 13" wheels.

Edit: How's the Highfield OM460 by the way?
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Old 24 March 2014, 12:25   #34
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Its been good, I've been using it through the winter and it hasn't missed a beat. Have you taken delivery of your new 540 yet?
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Old 24 March 2014, 12:40   #35
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Its been good, I've been using it through the winter and it hasn't missed a beat. Have you taken delivery of your new 540 yet?
Due on 4th April as I changed the spec a bit and opted for a BF90. Here she is pre-rigged. I will post more pics when I take delivery...

Apologies to all for going off topic!
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Old 24 March 2014, 16:41   #36
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https://www.gov.uk/towing-with-car/towing-equipment
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Old 24 March 2014, 18:10   #37
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My rough calcs so please feel free to shoot them down: SR4 dry weight (600lbs) = 275Kg Outboard - unsure what you have but say a 50hp = 120Kg 50 litres of fuel = 50x 0.74 = 37Kg Onboard electrical (inc battery) = 12Kg Onboard others (anchor, wrap etc) = 15Kg Total = 460 Kg Assuming the towcar can tow 750Kg, that leaves 750-460 = 290 Kg for the weight of the trailer plus error margin. If the tow car can only tow 500Kg, you may only have 40Kg for the trailer and error... Does this look correct? EDIT: Legal max as Trailer Guy mentions is 750Kg unbraked https://www.gov.uk/towing-with-car Cheers
The problem is that it appears the car has to be rated higher than the plated max gross weight on the trailer, not the actual weight of the boat and trailer.
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