Etz251 no spark

ETZ(including Kanuni), ETS, ES, TS, IFA-RT, BK, Saxon,

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Etz251 no spark

Postby jackotom » Mon Jul 08, 2019 4:05 am

Hi, my Mz etz 251 has been laid up for a long time
And now wont start, they seems to be no spark and the coil is getting hot
The bike ran fine a while ago.
Can anyone help.
Thanks dave.
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Re: Etz251 no spark

Postby Blurredman » Mon Jul 08, 2019 4:29 am

Seems to be no spark? there is either no spark or spark, surely?

Electronic ignition or contact breakers?

8) 8) 8)
1973 MZ ES250/2 - 17,000 miles
1979 Suzuki TS185ER - 9,000 miles
1981 Honda CX500B - 91,000 miles
1987 MZ ETZ300 - 38,000 miles
1989 MZ ETZ251 - 50,000 miles

ftp://blurredmanswebsite.ddns.net/Vehicle_Documents/MZ_Documents/
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Re: Etz251 no spark

Postby Puffs » Mon Jul 08, 2019 6:36 am

If your coil is getting hot it's constantly being charged, because for instance your points are corroded shut. Or something else is wrong. I think the advice is to check your ignition.

On the up side: the battery seems to work.
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Re: Etz251 no spark

Postby jackotom » Mon Jul 08, 2019 7:17 am

Hi,took engine case of and the electronic ignition
was very corroded.
I cleaned it up best I could but no joy
Can these be repaired or can you still buy new ones.
Thanks dave.
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Re: Etz251 no spark

Postby Puffs » Mon Jul 08, 2019 7:23 am

Hi Dave,

pics would help.

Yes, you can buy anything for these bikes, see for instance viewtopic.php?f=5&t=9257
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Re: Etz251 no spark

Postby jackotom » Mon Jul 08, 2019 9:17 am

Hi, cannot get picture to load?
Does anyone know how to remove all of the electronic ignition.
I wanted to see it had corrosion behind it.
Thanks Dave.
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Re: Etz251 no spark

Postby Andy_C » Tue Jul 09, 2019 9:59 am

Sounds like the electronic box or sensor is fried if the coil is getitng hot as it is continuously passing current.

Could understand if it was points stuck closed.

I had an ETZ 301 and that had electronic ignition - the sennsor was easy enough to remove as if memory serves it was obvious which screws held the sensor in.

Good luck.
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Re: Etz251 no spark

Postby jackotom » Thu Jul 11, 2019 3:38 pm

Just an update, put plug in and it did not spark but when put back in bike I kicked
The engine over a few times and nothing happened
But when I turned the ignition of it backfired
And a oily mixture splatted on back of my house.
Does anyone know what could be wrong
Thanks.
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Re: Etz251 no spark

Postby Blurredman » Fri Jul 12, 2019 2:50 am

Take the spark plug out

Then turn the ignition on. if it sparks when the ignition is turned on, I think the black box is blown, likewise when turning the ignition off.

I have done this myself by mis-wiring the system before now. :evil:
1973 MZ ES250/2 - 17,000 miles
1979 Suzuki TS185ER - 9,000 miles
1981 Honda CX500B - 91,000 miles
1987 MZ ETZ300 - 38,000 miles
1989 MZ ETZ251 - 50,000 miles

ftp://blurredmanswebsite.ddns.net/Vehicle_Documents/MZ_Documents/
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Re: Etz251 no spark

Postby Puffs » Fri Jul 12, 2019 3:29 am

Following a biased and flawed moderator choice (someone posting aggressive personal attacks is rewarded, while my technical posts are removed - behind my back & without any justification!), I have withdrawn from this forum.
Last edited by Puffs on Mon Apr 03, 2023 7:24 am, edited 1 time in total.
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Re: Etz251 no spark

Postby jackotom » Sun Jul 14, 2019 1:53 pm

Pic of mz electrics.
Attachments
20190708_142312.jpg
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Re: Etz251 no spark

Postby Blurredman » Mon Jul 15, 2019 2:20 am

From which ocean did you pick that out of? :lol: :P :P

Nah I joke- but seriously- I had the same ignition that I blew- Did you try as I suggested? :)
1973 MZ ES250/2 - 17,000 miles
1979 Suzuki TS185ER - 9,000 miles
1981 Honda CX500B - 91,000 miles
1987 MZ ETZ300 - 38,000 miles
1989 MZ ETZ251 - 50,000 miles

ftp://blurredmanswebsite.ddns.net/Vehicle_Documents/MZ_Documents/
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Re: Etz251 no spark

Postby Puffs » Mon Jul 15, 2019 5:38 am

Following a biased and flawed moderator choice (someone posting aggressive personal attacks is rewarded, while my technical posts are removed - behind my back & without any justification!), I have withdrawn from this forum.
Last edited by Puffs on Mon Apr 03, 2023 7:24 am, edited 1 time in total.
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Re: Etz251 no spark

Postby jackotom » Mon Jul 15, 2019 1:57 pm

Hi,thanks for all your help.
I did remove the generator cover and cleaned it out, it was a bit rusty, I think I need to strip the generator and get any corrosion of the parts.
I have some new brushes and the part the brushes fit into(sorry don't know the name)
I don't know were to connect a mutil tester to test things as I cannot find my Haynes manual!
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