TAPLIN TWIN 7 ccm

TAPLIN TWIN 7 ccm

This topic has 4 replies, 3 voices, and was last updated 18 September 2023 at 13:27 by Ramon Wilson.

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18 September 2023 at 07:05 #660432
Michael Herbst
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@michaelherbst53014
Good day everybody,

i am Michael from Germany. 64 vears old and i have been working with model diesel engines since my youth, especially Taifun engines, which i restore and anodize myself.

I also build a Webra 4 cylinder inline, which you can seen on You Tube.

I drive and love English motorcycles. BSA B33 1951 and TRITON Pre Unit 1956.

My question:

currently i restoring a TAPLIN TWIN 7 ccm boat enginge.

What thread size is used in this engine? Maybe some from the experts can help me.

Best regards

Michael
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18 September 2023 at 07:05 #4372
Michael Herbst
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@michaelherbst53014
18 September 2023 at 09:36 #660443
John Haine
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@johnhaine32865
Hello Michael, welcome to the forum. Would be great to see some photos especially of the Webra (and/or a link to the video).

Given that the Taplin is a British product of the 50s/60s IIRC, it may well use BA sizes. From my days messing around with British diesels in model aircraft (PAW19D, ME10 etc) I think they used BA sizes.
18 September 2023 at 13:22 #660464
Ramon Wilson
Participant
@ramonwilson3
Hello Michael from a fellow engine lover.

I re-bored and rebuilt a quite old and abused air cooled Taplin Twin many years ago and as John says they are BA threads on the original engines. They would either be 6 or 5BA from memory. Later versions were made in India I believe but whether they had BA threads or not I have no idea.

The version I did had a very soft aluminium cast case with several threads stripped. I bored out all tapped holes and made threaded inserts out of a much better aluminium material before drilling and re tapping the holes which worked well. It started very easily and ran extremely well though a strange feel on flicking after so many single cylinders before

This was well before I owned a digital camera I'm afraid so have no images that I can recall

Good luck with yours

Best – Tug
18 September 2023 at 13:27 #660466
Ramon Wilson
Participant
@ramonwilson3
Hi again, further to that last post I thought you might find these helpful
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