Brass liner resistance

[ray schrauwen]

With care and a little practice hobby-grade tubing can be bent easily without any time-wasting "annealing" or "filling with sand". I used to bend 1/8" brass and aluminum tubing by hand into cooling coils to fit snugly around an 05 motor - no kinks. Today I bend my 1/4" stuffing tubes by hand - no kinks. The secret is to start with a piece of brass somewhat longer than needed so that your hands have something to hold beyond the area which needs to be bent. That and going slowly, working from one end of the bend to the other. Extreme bends may take two passes to complete.

Or you can go ahead with annealing (which softens brass tubing, accelerating wear) and filling with sand, or buying tubing benders.



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Ditto,

[martin]

The problem isn't with the way the op is bending the tube, 3/16" o/d tube is simply the wrong size tube for a 4mm flex. Even if the tube was straight so no bending, 3/16" o/d tube is to small for a 4mm flex to run in.

[martin]

[QUOTE=dasboata;668933]3/16 ID for a 3/16 shaft will be too tight look into a KB lead Teflon liner or as suggested go up in size !!![/QUOTE
The op is using a 4mm ( .158" ) flex & not a 3/16" ( .187" ) flex. 7/32" OD / 3/16" ID is the correct size tube for a 4mm flex.

[Outboard]

Ok guys I installed a 7/32" tube and it just fits in the casing but I had to cut it shorter than the 3/16 tube.
The cable has freed a up a lot an I am much happier with the outcome. I packed it with grease as i'm sure the initial run in will need it. Thanks all for the info

[Outboard]

[QUOTE=martin;668953]

3/16 ID for a 3/16 shaft will be too tight look into a KB lead Teflon liner or as suggested go up in size !!![/QUOTE
The op is using a 4mm ( .158" ) flex & not a 3/16" ( .187" ) flex. 7/32" OD / 3/16" ID is the correct size tube for a 4mm flex.

So just to clarify 3/16 ID brass tube, is the same as a 7/32" OD?

[martin]

[QUOTE=Outboard;668971]

So just to clarify 3/16 ID brass tube, is the same as a 7/32" OD?

Correct.