Sea rider 5.4 approx weight

piemaker · 25 August 2012, 14:14

Hi all,

I am looking for a new engine for my ex coastguard 5.4 sea rider. A few considerations before I do anything though!

I have trawled through the forum for info & trying to make sure that a: I get the right power to weight ratio/fuel economy & b: that I don't overload my trailer & get a fine/points on my driving licence.

The most popular choice seems to be the Yam 90. I'm not too bothered about top speed & it's unlikely it will be used much further than a few miles off shore. Did I mention fair-weather too. I bought the boat from a sea cadet unit who used it on the london end of the Thames with a 40hp and it performed well, the sea I know will need a bit more for me & my sandwiches. In my mind I had 60-70hp to keep the weight down.

The trailer...

I have an indespension (un-breaked) roller coaster trailer that will take a max of 750-ish kgs. I'm going to call indespension with the serial number to be exact on tuesday as the VIN plate is a tad confusing. No problem towing the weight as I have a LWB Defender. I just want to make sure that the boat + engine + fuel + trailer is fully legal. Might be a trailer replacement but I hope not.

I also intend to weigh the boat & trailer at my local weigh bridge ASAP, again to be exact.

I found the info in the photo of 5.4 weights and have included the web link to them. Can anyone tell me if these figures plus any engine etc are accurate & if my proposed engine choice is sensible?

Thank youhttp://www.mlmarine.com/Products/Boa.../searider.html

Nos4r2 · 25 August 2012, 18:41

It's borderline and depends on the trailer weight/amount of fuel carried with a 5.4. Doggypaddle's rig is JUST under 750kg, mine's over when on the braked trailer.

Weigh it at a weighbridge is the only answer.

nik · 25 August 2012, 18:47

What about an etec?
Smaller, lighter, long service intervals.

Searider · 25 August 2012, 22:13

Hi Piemaker

I put mine on the weighbridge just before I sold it.

1978 Leisure spec with an out hill console replacing the back to back seats.
2001 Mariner 90 2 stroke
Single battery
Light s/s A frame
100 litre fuel tank
Anchor and chain
Un-braked indespension roller trailer.

Came in at about 740kg iirc

You might be able to dig up my for sale thread from 2005/6 - but I can't search on my iPhone.

I suspect with a coastguard spec you might be a bit heavier.

Duncan

piemaker · 25 August 2012, 22:14

Quote:

Originally Posted by nik

What about an etec?
Smaller, lighter, long service intervals.

This looks like a good option - if the 60hp can give enough oomph to push the boat along at a reasonable pace etc.. At 113kg it's pretty light too, only concern would be extra fuel consumption being a 2/s. found a spec sheet here
http://www.robincurnow.co.uk/pdf/evi...in_UK_60HP.pdf

Deffo need to weigh the boat/trailer combo before I do any more though. Will try & find a weighbridge this week.

piemaker · 25 August 2012, 22:18

Quote:

Originally Posted by Searider

Hi Piemaker

I put mine on the weighbridge just before I sold it.

1978 Leisure spec with an out hill console replacing the back to back seats.
2001 Mariner 90 2 stroke
Single battery
Light s/s A frame
100 litre fuel tank
Anchor and chain
Un-braked indespension roller trailer.

Came in at about 740kg iirc

You might be able to dig up my for sale thread from 2005/6 - but I can't search on my iPhone.

I suspect with a coastguard spec you might be a bit heavier.

Duncan

This is encouraging! I will have to take a picture of it so you can see the console/seating config. It hasn't got an 'A-Frame on it now but before the CG gave it to the sea cadets it did have.

Out of interest do you know what would make this spec boat heavier?

Nos4r2 · 26 August 2012, 07:54

Console/seating weight and A-frame plus motor weight are variable. Depending on motor there could be a 60kg difference.

It could be a 2 or 3 seat console if standard Avon or a different weight if an aftermarket one.
There's 3 types of A-frame fitted and the tube weight will change depending on spec too.

Searider · 26 August 2012, 08:49

Hi Piemaker,

Just dug out my 1990 Avon leisure craft brochure - gives the following weights for 5.4

Open. 239kg
2 seat. 300kg
4 seat. 314kg
Centre console 286kg

So it looks like the commercial ones are a bit heavier (30-40kg) perhaps due to heavier tube material, rendering and maybe even hull lay up?

Hope this helps.

nik · 26 August 2012, 09:54

Quote:

Originally Posted by piemaker

only concern would be extra fuel consumption being a 2/s.

Don't confuse etecs with the older types of two strokes, which were gas guzzlers.
I have never owned or used one, but I have spoken to several people that seem happy with them.
Any ETEC owners out there?

piemaker · 26 August 2012, 19:30

Quote:

Originally Posted by Searider

Hi Piemaker,

Just dug out my 1990 Avon leisure craft brochure - gives the following weights for 5.4

Open. 239kg
2 seat. 300kg
4 seat. 314kg
Centre console 286kg

So it looks like the commercial ones are a bit heavier (30-40kg) perhaps due to heavier tube material, rendering and maybe even hull lay up?

Hope this helps.

Mine has a console & 2 extra jockey seats - so, I'm guessing with it being a CG boat & prob a bit heavier than the norm it'll be around 350kg-ish + engine & fuel etc. still a good idea to find my local weigh bridge though.

Thank you for digging all the info out!