Need instruction manual for national geographic model #NG 750RTHS telescope

Check out NG website for this data.

I think you are asking for a replacement focuser. You can probably find one here: http://www.ebay.com/itm/4-5-or-6-Telescope-Reflector-Tube-1-25-Newtonian-Focuser-Metal-Plastic-NEW-/360936594869?hash=item54097f5db5

A manual is another question. These scopes are imported and no manuals are available. However the manual only has assembly instructions it does not tell you how to use the telescope to find objects in the night sky.

Find a local Astronomy Club and the members will help you set it up-- very easy once you see it done 1 time.

Clear skies.

Please you visit www.clestron.com/telescope/powerseeker114AZ & you download the manual.This same model which you want.
Thanks.
Dhananjay Raval -India.

Here are all of Meade Telescope manuals--

http://www.meade.com/manuals/index.html

Find one under either REFLECTOR or REFRACTOR that is similar to your scope. There are no manuals available for National Geographic, but they all assemble in a similar fashion.

I answered this question in your OTHER posting.

You will not find a manual for that imported telescope. NEVER buy scopes from Ebay, craigslist, or any of the big box stores unless you know what you are buying.

Most of them are imported and have NO CUSTOMER SUPPORT!

Manufacturer is unknown for this scope, but it probably originates in China and is resold with the National Geographic brand name, 150$ seems a little high for a used one. I would probably price it at 100-125$ depending on the condition and the included accessories, if any.