Tourist A101 timing

[alexd912]

Hello,

I have A101 and as far as I know it is the 175 4 stroke.

I wanted to check the timing on it and found 3 marks on the fan housing as seen in the pictures. I think the markings are F.P, S.P and one I cant remember.

As seen from the picture there is no Advance / Retard mechanism on it.

At which point should the points open at?

Danke
Alex

[BerndSt]

Hi Alex,

are you sure it's a 101? That would be a great find indeed.

If you want some technical information concerning the different types of Tourists you can get them at the Club's homepage. See https://www.heinkel-club.de/t3/index.ph ... B7D7E%20-- for further references.

Anyway - let's assume it's a "Kicki" (as the first Tourists are nicknamed because of the kick-starter). Unfortunately there is no service manual for this type.

But the engines of all types are very similar (not identical, but similar). So you can get an idea how the engine works and how it is to be maintained by looking into service manuals for later types.

The first available manual is for type 103-A0. It can be downloaded from the Club's homepage at https://www.heinkel-club.de/t3/fileadmi ... _103a0.pdf.

This manual is available in German only. If you prefer an English manual you can get this one for type 103-A1: https://www.heinkel-club.de/t3/fileadmi ... _103a1.pdf (it's the only one in English).

Please see pages 25 to 27 - there you will find some very helpful references concerning the ignition, esp. page 27 - there you will find a description for the three marks on the fan wheel and how to set the correct timing:

"Mark: OT 44/1 = Top dead centre
SP 44/2 = retarded ignition
FP 44/3 = advanced ignition"

BTW: there is an advance unit - at least at the later type engines (I don't know the 101 engine). See images 51 and 53 (it's behind the fan wheel and can't be seen from "the outside"). Try to move the breaker cam (e.g. with tongs) - the advance unit should move a little bit from left to right/right to left (if there is one - I guess there is, otherwise the mark "FP - advanced ignition" would make no sense ).

I hope this helps.

Good luck with your Tourist and have fun!

Regards,
Bernd

[alexd912]

Hey,

Big thanks for your reply and sorry for the late answer.

I got the wrong name and it is a A102, sorry about that.

For some reasons the manual links do not work, but I think I have copies somewhere.

Link Expired. Access denied!
Next time I have the back off again I will check this better.
So the Advance Retard is behind the fan then, this you can not see it?
So timing is the same for the 102 and 103?

I will have to check as I start to get a sudden loss of power at 80kph and engine cuts in and out till I drop back to 75kph.
Carb is a new Bing and not the original make.

Im sure my next issue of the bike almost stalling is not an ignition issue, but the bike tries to stall when palling away slowly and I need to really put the gas on to get her moving.

Regards
Alex

[BerndSt]

Hi Alex,

so it's an A102 - not bad either

Unfortunately I'm not familiar with the A102 engine (my Heinkel is an 103-A1). But I'm quite sure that this engine uses a SIBA generator and a SIBA ignition. So the timing and its setting should be very similar to the settings documented for the 103-A0.

Perhaps one of our 102-specialists can give you better help and exact settings?

You can find the settings for type 103-A0 in the service manual for this type (page 22). It's in German, but I'm sure you can translate it (using translate.google.com or deepl.com for example).

The most important part is:

"The breaker contact distance is: 0.35-0.45 mm. The setting is made for late ignition (centrifugal weights not swung out). It amounts to:0.6-0.8 mm v.o.T., measured with ignition setting device (404/W 10) or 8°-10° v.o.T. Early ignition is carried out at this setting:6.5-7.0 mm v.o.T. or 33°-35° v.o.T. automatically by centrifugal governor." (translated by deepl.com; "v.o.T." means t.d.c in English, which is "Top dead center").

Please keep in mind that type 103-A1 (the one refered to in the only English manual) uses a BOSCH generator and ignition with other settings - I'm quite sure that these would be wrong for your 102.

By the way: I changed the download links in my post from 23.04.2019, they should work now.

If you want to be shown how to set the ignition you can watch some videos at https://www.youtube.com/user/Heinkelclub/videos. Look for videos with "Zündungseinstellung" in their title. They are in German, but I'm sure you will understand the main points simply by watching.

Please have an additional look at video https://youtu.be/ZKM6GzRVoZM. There is shown how to test the advance/retard mechanism (using a stroboscope lamp). This is very important for higher RPMs (and could therefore be one possible reason for your problems above 80kph).

A Bing carburator on the old 102 engine? This could very well be the cause for your other problems (high speed as well as low RPMs). It will work (I'm sure) but you have to adjust the carburator settings very meticulously. My personal guess for your problems? Could be a wrong main jet/nozzle (esp. at 80kph and above). Or dirt. Or the accelerator pump (see https://youtu.be/zZryLQ0O2ng!). Or accumulated dirt in the fuel tap. Or, or, or...

You should disassemble and clean the carburator first (see "Heinkel-Club Service Videos" at YouTube, search for videos titled "Heinkel-Club Service Video 06" to "Heinkel-Club Service Video 11").

Then you have to do all the carburator settings "from scratch". You can get some very good hints how to do it at http://pteng.de/heinkel/antrieb/antrieb.htm, part "Vergaser". Again in German only, but deepl.com (for example) gives you a (halfway) reasonable translation.

Have fun and good luck with your 102,
Bernd