[PSUBS-MAILIST] MK101 oil compensation tap

[Alec Smyth via Personal_Submersibles]

Actually on the new boat I've drilled and tapped the apex cap. It came out
nicely, I plug it with a little SS allen screw that has an NPT thread on
it, so the result is completely flush. Note this is just for filling. I'm
using a little plastic bellows as a compensating volume, and that is tapped
into a custom attachment for the motor, not into the motor itself. But it
could go just where Cliff indicates, or even on the shaft itself.

Best,

Alec

On Wed, May 20, 2015 at 12:08 PM, Cliff Redus via Personal_Submersibles <
personal_submersibles at psubs.org> wrote:

> Jon, when you take the MK 101 apart you will see why no one has drilled
> the apex cap.  The cap is an aluminum casting that has a support boss right
> at the apex that holds the roller bearing and bushing for the motor axle.
> As I elected not to drill the housing I can't comment on preferred
> location. The body of the housing has the permanent magnets but there is
> room between the magnets for a port.  You would have to position the port
> so it does not interfere with the long bolts that hold all the parts
> together.  The assembly comes apart very easily.  Just keep track of were
> everything goes.
>
> Regards
>
> Cliff
>
>
>
>
>
> Cliff Redus
> Redus Engineering
> USA mobile:  830-931-1280
> cliffordredus at sbcglobal.com
>
>   ------------------------------
>  *From:* Jon Wallace via Personal_Submersibles <
> personal_submersibles at psubs.org>
> *To:* Personal Submersibles General Discussion <
> personal_submersibles at psubs.org>
> *Sent:* Wednesday, May 20, 2015 10:52 AM
> *Subject:* [PSUBS-MAILIST] MK101 oil compensation tap
>
>
> At first glance the MK-101 shell looks pretty thin.  I know they've been
> drilled and tapped to accomplish oil compensation but before I start I
> just want to know of any tips/tricks I should be aware of. Also, any
> reason nobody has drilled and tapped at the apex of the head on the end
> opposite the propeller?  Most every one has drilled in the cylinder body.
>
> Jon
>
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