Morse control cable - push at one end, nothing at other end

[scrambledegg]

While in the throws of diagnosing why my Morse throttle lever produced ever diminishing response from the engine (subject of another thread), until only idle revs were possible, I discovered that, although the Morse control was pushing the central rod of the throttle cable perfectly well, there was no movement at all of the central rod at the engine end.
Tracing the cable over its entire run I discovered that part of the rudder linkage had chafed away at the armoured outer cover of the throttle cable, the corrosion had then done for the inner rod. Now to my question - thanks for your patience:
Is making up a new cable possible for a courageous amateur. Or, should I call in a pro?
is there some halfway house where I give specifications to a specialist (length, pictures of end fittings)?
Anybody got experience of doing this?
Thanks for your always generous responses.

 

[BabaYaga]

Measure the existing cable, establish if and how a new one would have to be rerouted because of the chafe and whether that would effect its length, and order a new one.
They cannot be repaired if broken and a new one is not expensive.

 

[Tranona]

Yes, no need to make it up. They come already to install in a range of lengths. As suggested measure your existing one when you take it out, but you might want it next length up to avoid the chafe point. The biggest challenge is usually the contortions needed to extract it and feed the new one in.

 

[scottie]

Yes, no need to make it up. They come already to install in a range of lengths. As suggested measure your existing one when you take it out, but you might want it next length up to avoid the chafe point. The biggest challenge is usually the contortions needed to extract it and feed the new one in.

Better going down to min size than longer if possible as this will minimise drag

 

[NickRobinson]

My experience was thus, boat performed perfectly for 2hrs+ under engine after first launch by me, throttle and gears fine.
After anchoring, engine off for 2/3 hrs, the engine would run/rev but not go into either gear.
After suitable curses re. need a tow... and a new gearbox.. realised the gear morse was lying on the hot part of the exhaust
manifold.
Hot, the molten plastic had allowed movement, once cold it had set solid. Releasing the cable allowed manual selection and an order once home for a surprisingly cheap replacement

 

[scrambledegg]

Thanks guys for helpful replies. I was at the boat when I first posted, so I was encouraged to go to asap supplies, Fareham on the off chance they could supply a new one. I had measured the length of the cable and the size of the bits and bobs on the ends and taken photos and all that, but it wasn't quite enough as apparently there's a number of different specs for the size of the threaded ends of the rod. If I had taken the old cable with me, they could have supplied an exact replacement, so that's my advice to anyone out there wanting a new Morse control cable: take the old one with you.

 

[Tranona]

Better going down to min size than longer if possible as this will minimise drag

Unlikely to make any difference. stickiness (if there is any) is usually caused by having too tight a radius. Think of MOBOs with flybridges and then imagine how long their cables are without any problems.