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MOKI RADIAL Care and Maintenence

Old 07-04-2022, 07:11 PM
  #4976  
tmac48
 
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Weigh each blade.
Old 07-10-2022, 04:41 PM
  #4977  
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Hey guys, ok so I weighed each blade separately and they were exactly the weight that was written on them, 150g. All exactly the same. So the prop is balanced.

So is it normal that there is some ďshakeĒ when transitioning from low power to a high power setting?

I have a few other questions as well. After landing Iíve noticed that 95% of the exhaust oils are only coming out of one exhaust exit. The engine has the exhaust ring and just and extension on each outlet to bring it to the scale location on my P-47.

On my second flight I was a bit more aggressive on the power and noticed a fair amount of rpm sag at high power. To me this is a symptom of a high needle being a tad to lean? RPM on the ground is around 3600 RPM or so. Or maybe itís to much pitch? To remind you guys Iím running the 250 7 cylinder and not the 5. So Im expecting a little less power then the 5. The pitch is set to recommend for 5 cylinder. Canít find any info for the 7. I was thinking to richen the mixture an 1/8th and back off the pitch just a very small amount.

Temps in flight were about 230 steady, and seems to remain pretty constant.
Old 07-10-2022, 04:57 PM
  #4978  
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A couple of thoughts :
I have a couple of 250 5 cylinders, and although they run well, they are not vibration free through the transition.
You have checked the prop, and it should be fine.
If it is sagging, try backing off the hi needle just a tad. Mine turns a 4 blade 28-18 sep prop about 3900 rpm static. How much pitch are you running ?
- Mike O.
Old 07-10-2022, 04:58 PM
  #4979  
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Forgot to mention- my exhaust residue is like yours- WAY more out of one side than the other- on both of my engines. I have always wondered why myself...🤔
Old 07-10-2022, 05:33 PM
  #4980  
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Mike,

The manual says if I use the jig where itís supposed to be then it should be about 14Ē pitch for the 4 blade. It might be a tad bit much for the 7 cylinder.

ok glad to hear your exhaust is doing the same. I figure itís the direction of the exhaust flow and the oil residue takes the path of least resistance.

so you agree it might be a tad lean, Iíll try that next time I fly it and since I have the prop apart Iíll back off the pitch to gain a few extra rpm.
Old 07-10-2022, 06:01 PM
  #4981  
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DHC6 - I own 2 250's. You are correct regarding the transition. There is a point where both the low and high needles influence the fuel flow and create a rich mixture. Some may be able to tune this out, but I have learned to live with it. Your ground rpm's seem a little low as the prop pitch may be too high. Try to adjust the pitch to get a static 3900 to 4000 rpm as Mike say's. If you are under 5000 in the air you should be OK. Exhaust oils will reduce as the engine is run in.

BTW - I don't want to spill the beans, but I heard rumor from a good source that Airworld/Moki may have a new dealer or service point in the USA. Can anyone confirm this?

Regards - J Tab

Last edited by Jaketab; 07-10-2022 at 06:04 PM.
Old 07-11-2022, 01:16 AM
  #4982  
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DHC6, I was having all the usually complained about troubles with my 250. hard to start, loosing cylinders 3 and 4 running rough and shacking at mid range. Not really sure what fixed it but went the whole hog. Complete carby kit, adjusted the needle and seat height. new plugs, new Turbulator-- and so far only a very rough high and low needle settings (1-1/2H. 1+L) She now starts after 2-3 flips, 900 rpm idle, 4600 rpm wot, transitions very smooth low to high no mater how fast or slow you throttle up. Runs true at all throttle settings without going rich or lean at any setting, Have the same RPM on 32 x 18 2blade as on a 34 x 16 2blade. To me this indicates that the Moki can be made to run as one would expect it should, very happy with mine now. Will get back to it shortly and do a final adjustment of the H & L needles to get it dialed in, it very well may be dialed in as it is.

tmac48
PS.Meant to say that I do run a pump.

Last edited by tmac48; 07-11-2022 at 01:18 AM.
Old 07-11-2022, 06:15 AM
  #4983  
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Jaketab - I have not heard any news on new dealer or service provider. But am anxiously awaiting for something here in the US, as I am sure many others are as well! Let me know if you hear anything definite.
Old 07-12-2022, 10:14 AM
  #4984  
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Yes I am interested,

Please PM me.



Old 07-12-2022, 11:52 AM
  #4985  
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Default Moki New Distributor

Originally Posted by GeorgiaFlyer View Post
Jaketab - I have not heard any news on new dealer or service provider. But am anxiously awaiting for something here in the US, as I am sure many others are as well! Let me know if you hear anything definite.
I have info from reliable source that CARF will be the new importer/distributor of the Moki lineup in the US. They are even re-branding the motors as CARF 250's in the over seas market; I would expect that they will be doing the same here. They are in the process of trying to setup a US service center. This is all that I was told.
BTW, I did just recently have to send my 250 back to Airworld in Germany for service, since there is currently no other option in the USA to my knowledge.
The price was fair, as the Euro is now almost 1-1 with the dollar. Turn around was about 4 weeks. But the shipping costs, as you would expect, was astronomical.
-Mike O.
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Old 07-12-2022, 12:48 PM
  #4986  
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[QUOTE=IFLYBVM2;12734929]
The price was fair, as the Euro is now almost 1-1 with the dollar.
-Mike O.[/QUOTE

At $3700 Moki 250 is now a good buy!!
Old 07-12-2022, 03:12 PM
  #4987  
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Originally Posted by IFLYBVM2 View Post
I have info from reliable source that CARF will be the new importer/distributor of the Moki lineup in the US. They are even re-branding the motors as CARF 250's in the over seas market; I would expect that they will be doing the same here. They are in the process of trying to setup a US service center. This is all that I was told.
BTW, I did just recently have to send my 250 back to Airworld in Germany for service, since there is currently no other option in the USA to my knowledge.
The price was fair, as the Euro is now almost 1-1 with the dollar. Turn around was about 4 weeks. But the shipping costs, as you would expect, was astronomical.
-Mike O.
Mike - The info you relayed is exactly on point from what I was privileged. Also told that announcements may be very soon.
J Tab
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Old 07-12-2022, 11:44 PM
  #4988  
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[QUOTE=ChemE;12734941]
Originally Posted by IFLYBVM2 View Post
The price was fair, as the Euro is now almost 1-1 with the dollar.
-Mike O.[/QUOTE

At $3700 Moki 250 is now a good buy!!
That would be fantastic, close on $6000 in AUS!
Old 07-18-2022, 01:31 PM
  #4989  
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This just came across on FB.
CARF is now USA distributor for MOKI Sales and Service.

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Old 07-18-2022, 03:36 PM
  #4990  
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This is welcome news. I have a partially completed CARF model with a Moki purchased with the kit from CARF that I bought second hand. Happy to hear a resource available for Moki engines in the US
Old 07-18-2022, 05:39 PM
  #4991  
Hinckley Bill
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Don't get me wrong, glad to see CARF pick up the Moki ball, but there was an excellent MOKI resource in Dr Gotz via Vogelsang........it's sad that supplier 'issues' with Moki soured this relationship
Old 07-24-2022, 12:38 PM
  #4992  
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Hello all, I am installing the CH ignition for my Moki 250cc and the latest fuel it was used was VP Racing Motorsport 103 fuel. I cannot longer get that fuel, so I have two options, AV Gas or fuel pump gas. Which do you recommend?
The VP racing fuel never gave any problem at all, the engine was reliable and running great (with the round original ignition).

Thanks.
Roberto
Old 07-24-2022, 03:20 PM
  #4993  
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Originally Posted by zelayaroberto View Post
Hello all, I am installing the CH ignition for my Moki 250cc and the latest fuel it was used was VP Racing Motorsport 103 fuel. I cannot longer get that fuel, so I have two options, AV Gas or fuel pump gas. Which do you recommend?
The VP racing fuel never gave any problem at all, the engine was reliable and running great (with the round original ignition).

Thanks.
Roberto
I have been using 100LL AV gas for the last 5 years. Mixed with Amsoil Dominator 45/1 and 1 oz Seaform per gallon. Use the AV gas in both Moki 250's and Valach 210. At the end of each flying session, I put about 1oz Seafoam in the remaining fuel and run briefly to clean the engine.
Please report back sometime and let us know your opinion of the CH Ignition.

Regards - J Tab
Old 07-26-2022, 10:59 AM
  #4994  
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Originally Posted by Didier View Post
Hey guys.

We tried to run and start one of the 2 new Moki 180 the day before yesterday . I sayed tried, as the engine was only able to run for a couple of second and then dies. We tried to start for 2 hours and then we could get it to run for a couple of minutes. Runs really rough and the lower cilinders didnít fire. We tried to run it leaner with limited results. If you go full power, it sounds like all cilinders are firing but when you go to mid or idle you miss one or 2 cilinders.

yesterday we tried to start it again. Same result. 3 man with a sour shoulder trying to start the damn thing.

some fact:

- 2s lipo used on Ignition

- fuel 1:40 like they do in the factory

- removed the plugs couple of times to make them dry

-L need 1,75 open. H needle 1,25 open

-pulse line is clean (brand new engine)





I have a Saito 60 an 90 radial and they are so much easier to start and to adjust. Always a couple of flips and it runs. So we are a bit disappointed now. Any suggestions will be very much appreciated. Iíve read that an after market Ignition system seems to work better? CH or rainbowtronic? Good idea to leave the frustration behind and buy one of these directly?
Hello guys.

After several experiments we still couldnít start and run the Moki180 properly. We were so frustrated that we did not believe anymore in this engine.

After reading this tread we came to the conclusion that there are 2 Achilles heels on this engine.
1, fuel delivery
2, poor ignition.
We bought 2 Rainbowttonic ignitions. Removing the original ignition was very easy and a 15 minutes job.
UNBELEIVABLE!!! What a difference. The engine performed flawlessly and so easy to hand start.
We are so happy we finally have good running Mokiís.
Guys, if you have problems with your engine, consider a third party ignition and throw away the original. We bought Rainbow as we live in Europe but I believe CH is very good as well.
Thanks everybody for the good advice.


Last edited by Didier; 07-26-2022 at 07:41 PM.
Old 07-28-2022, 04:00 AM
  #4995  
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Originally Posted by Jaketab View Post
This just came across on FB.
CARF is now USA distributor for MOKI Sales and Service.
Interested to know exactly where located and if this "service center " is stocking or ordering parts. And who turns the wrenches. And what training they have received from the manufacturer. Curious blanket statement on this add....any one know details?
Old 07-30-2022, 04:48 PM
  #4996  
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Originally Posted by Hinckley Bill View Post
Don't get me wrong, glad to see CARF pick up the Moki ball, but there was an excellent MOKI resource in Dr Gotz via Vogelsang........it's sad that supplier 'issues' with Moki soured this relationship
Hi, I have been trying to get in touch with Dr Gotz for some time now, Does anyone on this forum know of the same problem. I get a reply from my emails stating that they are not available till 26/ 7/ 2022?


Regards Tmac48
Old 08-01-2022, 03:34 PM
  #4997  
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Originally Posted by tmac48 View Post
Hi, I have been trying to get in touch with Dr Gotz for some time now, Does anyone on this forum know of the same problem. I get a reply from my emails stating that they are not available till 26/ 7/ 2022?


Regards Tmac48
Disregard the above, finally have a reply from Dr Gotz.
Old 08-05-2022, 10:14 AM
  #4998  
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Does anyone know how to hookup the CH ignition for the Moki 250. I seem to have lost the instruction sheet to mine. I assume the lead with one red and one black wire is the power lead, there's one for a tach reading (which i'm not using), one three wire connector for the status LED, and a fourth one with four wires which i believe is for the magnetic crank position sensor.? This last one is the troublesome one: wire connected to ignition box is red/black/white/brown while wire from the magnetic sensor is black/white/red/brown. NOT IN THE SAME ORDER.
When i power up the unit (2 cell lipo) the red LED blinks as i spin the prop. But don't seem to be getting any spark? Please help CH not answering the phone.
Old 08-05-2022, 01:10 PM
  #4999  
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Hello, I recently converted my Moki 150 to a CH Ignition. The CH Ignition included an adapter to match the Moki gray plastic connector to the CH Ignition connector. This worked fine but I wanted to go directly from the Moki braided four wires to the CH Ignition connector.

I used the supplied adapter to determine the color coding relation to the Moki wires. The Moki color sequence (starting with the blue coded wire ) goes Red/Black/Brown/White. I'd post pictures but I don't have that privilege .

So essentially I have a new connector end which matches the CH Ignition connector perfectly. The Moki wires are VERY fragile and takes some care is stripping and crimping the pins. The mating pins and connector are available on Hansen Hobbies.

I added some heat shrink tubing to secure the wires and the new connector. Very secure and no more Moki connectors to fail. Hope that helps.



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