Speedometer cable

[Bob Carriere]

Hi Harry

You are on the coast and boats, particularly older ones being refitted have mechanical tachometer and each boat requires a different size cable drive.
I would shop around for boat restorers and the guy you find will be older than you.

I had a Chev T case driving a GMC speedo and the fittings of GMC and Chevy are not the same. Tracked down a retired instrument repair person who had retired but still did special orders, in particular for older boats, all his equipment were contained in one large spare bedroom. Walls were lined with cabinets containing odd spare parts. I was offered a choice of rubber encased waterproof casing or bare metal. Cost me less than a $100 BUT took me two hours to find his place in the country. Not sure if he is still alive but definitely not online.

See you on the docks.

Bob C

[Harry Moon]

Both ATP and Raybestos have a whole catalogue of different speedo cables listed, i woulkd think it would need somebody knowledgable to mate up the right part number/style of ends.
Sorting out cables I've tucked away I have found the chevy one I needed.

[Harry Moon]

probably have them but which one.

http://atpautomotive.com/cables?subcategory=713

[Jacques Reed]

Hi Harry,

This might help:

My Ford F-15A has a Waltham round gauge speedo with 5/8-18 UNEF male end so that end of the cable needs a 5/8-18 UNEF female nut.
If Ford and Chev transfer cases use the same speedo driven gear connection that end is 7/8-18 male threads. Almost certain the Ford and Chev single speed xfer cases are the same so hope that applies to the two speed cases. So the transfer case end of the cable needs to be a 7/8-18 female nut.

The transfer case inner cable end has a 0.203" diameter tang tip and the speedo end has a 0.104" square end about 1" long to go into the speedometer.

My inner cable is 85" long as per Hanno's info. Length isn't critical as long as the difference between the inner cable and outer casing is 24mm to 32 mm longer. I would go for 32mm longer and cut off a bit of the square end if required.

To do it again I would add about 4-6 inches to the overall length to make bigger radius bends in the cable.

Cheers,

[Harry Moon]

all good info.