This should be easy...

[tome]

About to replace my ageing Furuno radar scanner with the latest Raymarine offering. Here's the current setup

...and here's the proposed replacement. Should be easy, no?

 

[prescott56]

Looks like one of those 5 min jobbies which last all day...hehehhehehe

good luck

 

[boatbuilder]

Yep simple job , change scanners, just done one.
2 Men 6 hrs /forums/images/graemlins/smile.gif each!!

 

[Kilter]

be sure to grease the mast liberally before you climb it

 

[jonathankent]

[ QUOTE ]
...Should be easy...

[/ QUOTE ]
Those inevitable last words... /forums/images/graemlins/grin.gif

 

[AndrewB]

Yup, easy enough. We replaced our Furuno with a Raymarine unit about 7 years ago. Decided to leave the same mount on the mast which is big enough for Raymarine, but two new bolt holes had to be drilled. Saved the cost of a new mount.

Had SWMBO swinging around the mast on the end of a halliard like a conker on a string, connecting all the wires, while I shouted up the instructions from the manual. The yard were doing the same job on a nearby boat - and we beat them to it. What's more, it worked, and has stayed working ever since!

 

[tome]

You're not wrong!

So far I've discovered that there's bout 15mm diference vertical spacing between the 2 Scantrut mounts, so thinking about making an adaptor plate rather than fitting a new mount and having to drill new holes in the mast

 

[tcm]

replacing old stuff

ooh nice getting new stuff. But doesn't the old one work? Does it miss things or get them out of focus?

I always felt radar as a pleasingly complex item like cd players , gps and the like - they either work or blimmin don't work at all, hence chuckem and get a new on. Unlike bicycles or record players frinstance which often work but quite wiffily, which is useless.

 

[tome]

Re: replacing old stuff

The old one still works sort of on big targets but eventually steam has to give way to t'internet and anyway the crew have been taking the p*ss of late

Bicycles far more complex IMO. I have a moody fox languishing in the toolshed

 

[tome]

Must have been a different model 'cos none of the holes line up

Also, there are webs and lands cast into the top plate to reinforce the mounting holes (visible in the first photo) - these would be in the wrong place for the new scanner

So an adaptor plate seems to be the way to go

 

[Fr J Hackett]

Did exactly the same job 3 months ago, the original scanstrut mount for the furuno as you suggested looked as though their was a slight missalignment on the pop rivet holes but in practice the new Raymarine 2KW mount fitted the existing holes. 4 to 6 man hours *2 is about right including taking down and refitting headlinings etc. I fitted the bracket then fitted the raydome complete with cable (uncut ) prior to deciding on how much I wanted at the below deck junction box. Then cut and pull through the cable using a mousing line threaded using the old furuno cable as a pull through. My mast had a couple of foam inserts holding the cable against the mast wall, these can be very tight use lots of fairy liquid on the cable or thread another mouse line if you cant get the cable through. I hoisted the raydome up to the bracket in a sail bag and passed the cable through the bracket which was held by the unwilling helper in case I dropped the Raydome on fixing, providing you clamp the cable well it will hold the Raydome in an emergency. The rest is plain sailing as they say, good luck.

 

[tome]

Thanks, very useful

I've already removed the cable run from nav station to base of mast and put a mouse in place. The mast run is about 32 feet (keel stepped mast and it emerges at the heel) so my next move is to bring down the Furuno together with the mast bracket and run a second mousing line in place through the mast

Once I have it down, I'll look at whether it's easier to modify the existing base plate or use a new one - not keen on putting more holes in the mast if it can be avoided

Incidentally, the 2nd picture incorrectly shows the 4kW radome which is larger than the one we're fitting