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Turbine Builder
31st Dec 2018, 05:42 PM
I have a couple of Sachs KM24 engines that i got a few years ago and now is the time to get them running. They both have stuck apex seals,as you can see this one was rusted in i got it free but snap the side seal and corner spring:((:(( Parts for these engine a getting hard to get,but found a chap who sold me some news side seals and corner springs. The parts have just landed here in Melbourne, so should have the engine back together soon:)

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KBs PensNmore
31st Dec 2018, 09:10 PM
Thanks for the pics, what are you going to use it for when its finished?
Kryn

Turbine Builder
31st Dec 2018, 09:36 PM
Thanks for the pics, what are you going to use it for when its finished?
Kryn
G'day Kryn,
you welcome, i think i will sell one of them and use the other in a motorcycle or maybe a go kart.
Cheers,
Mark.
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caskwarrior
1st Jan 2019, 01:36 AM
Do these have Mazda style oil injector or oil mix type system for seal lubrication? Did these Sachs sell in big numbers?

Turbine Builder
1st Jan 2019, 08:06 AM
Do these have Mazda style oil injector or oil mix type system for seal lubrication? Did these Sachs sell in big numbers?
No oil injector,just oil petrol mix. for lubrication of seals and bearings. There were 30,000 of the 303s Sachs engines built as for the KM 24, 37 and 48 engines i guess several thousand units were made they were use for outboard motors, motorcycles,chainsaws, lawn mowers,light air craft. snowmobiles.pumps, and generators.They come for sale now and again on ebay.
Cheers,
Mark.

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wheelinround
1st Jan 2019, 10:05 AM
Ah you poor man!
When these motors first hit the streets I was in awe of them in cars sweet sounding Mazda. Friend of mothers had one in the first 3 months it was more in the dealers workshop than on the road.
These days I hear the familiar sound along the near by highway of a fellow taking his Rotary for a spin that lumpy sound still the same.

Turbine Builder
1st Jan 2019, 11:54 AM
Ah you poor man!
When these motors first hit the streets I was in awe of them in cars sweet sounding Mazda. Friend of mothers had one in the first 3 months it was more in the dealers workshop than on the road.
These days I hear the familiar sound along the near by highway of a fellow taking his Rotary for a spin that lumpy sound still the same.
Yeah a couple of friends had the rx4 and rx3 and yes they have that sweet sound was even better when they were modified. They are very high maintenance vehicle.

jhovel
1st Jan 2019, 09:04 PM
I saw one of the prototype BMW bikes with this engines in the very late 60s or 1970 at the IFMA in Cologne, Germany. It was fitted into a BMW 250 single frame, attached directly to the BMW gearbox and rear drive - in a frame shape not dissimilar to the Hercules you show above. I thought it was a ripper idea - alas it never went to production....

Turbine Builder
1st Jan 2019, 11:23 PM
I saw one of the prototype BMW bikes with this engines in the very late 60s or 1970 at the IFMA in Cologne, Germany. It was fitted into a BMW 250 single frame, attached directly to the BMW gearbox and rear drive - in a frame shape not dissimilar to the Hercules you show above. I thought it was a ripper idea - alas it never went to production....
Yes there was a lot of ideas floating around back then on what the rotary can be used on, the engines i have are ~23 HP and hardly any vibration compared to a piston engine. Here is a vid of a KM 48 engine i had and you can see it not shaking all over the place. https://www.youtube.com/watch?v=gvG8M_z6Y08&t=14s

Turbine Builder
6th Jan 2019, 06:28 PM
I finish cleaning some of the parts and The new parts have arrived and have started the rebuild, clean all the carbon off the seals and springs. I installed seals and springs on one side of the rotor

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Turbine Builder
6th Jan 2019, 06:36 PM
OK got the engine back together and tried to start it no go http://www.ausrotary.com/images/smilies/icon_sad.gif I replace the coil and got it to start but can't get it run. So i will replace the points,condenser , replace the fuel pump and check the timing.

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KBs PensNmore
6th Jan 2019, 08:52 PM
There's not a lot of moving parts in that motor is there, unlike a conventional two stroke motor.
Kryn

Turbine Builder
7th Jan 2019, 01:49 PM
There's not a lot of moving parts in that motor is there, unlike a conventional two stroke motor.
Kryn
No and they are very easy to dismantle and rebuild.

Turbine Builder
7th Jan 2019, 02:02 PM
I had a good read on the manual last night and did a test on the fuel pump,as what the manual was saying to do. I knew the pump was a bit dodgy the vale was sticking and these units are sealed so you can not repair them so replace with a new pump and BINGO shes up and running:U:U No need to replace the points, condenser shes running real sweet:D Got a short vid of the engine at idle will make a better vid once i tidy up the wring.

https://www.youtube.com/watch?v=ZAvXeeSTgAk

Turbine Builder
11th Jan 2019, 06:08 PM
I tidy up the wiring and hook up a kill switch, as you can see in this vid there is fuel dripping out of the over flow pipe when at idle.I'm not show why this is happening :?

https://www.youtube.com/watch?v=Kl15FPAZ8EM

stiffman
11th Jan 2019, 08:55 PM
These are really fascinating.
I never realised anyone made a small rotary like this.

Turbine Builder
11th Jan 2019, 10:00 PM
These are really fascinating.
I never realised anyone made a small rotary like this.
Yes they are and very simple engine. Felix Wankel was the inventor of the Wankel rotary engine.

nadroj
12th Jan 2019, 08:56 AM
Are reports true that F. Wankel never drove a car?

Grahame Collins
12th Jan 2019, 12:45 PM
According to Wikipedia he never gained a licence as he was near sighted.

Grahame.