Author Topic: Eachine ET-1 Adjustment and Fixing (fiddling)  (Read 351 times)

Kmot

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Re: Eachine ET-1 Adjustment and Fixing (fiddling)
« Reply #15 on: July 14, 2019, 10:12:57 pm »
I recently got my ET-1 aka M90 engine. And I only found this forum today. So, based on knowing nothing except what I watched in one video, I mixed some Coleman fuel and 20% MMO  :o and have been running my engine on it and it seems very happy with this fuel. I also put some grease on the gears and light oil on every other moving part. The first time I started it I let it run all the fuel and it lasted about 30 minutes. I then ran a second tank and 30 minutes. I saw a video about removing one spring from the regulator to slow down the idle and I did that. The person who's video I watched about the engine warned me to not run the engine for 30 minute stretches because the piston ring is only an o-ring and long run times would probably damage it. So now I run a few minutes at a time.

I really enjoy this engine. It is one of the most fun miniature engines I have run.

BTW, how is the timing adjusted?

Stoker

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Re: Eachine ET-1 Adjustment and Fixing (fiddling)
« Reply #16 on: July 15, 2019, 12:42:42 am »
Tom, the timing is adjusted on the inside of the flywheel opposite the one with the governor, where you will find a disc that is attached to the crank with a set screw. There is a small round magnet mounted in the flywheel side of that disc that activates a Hall Effect sensor (black plastic rectangle) that is mounted on the outside of the engine frame in that location. On the opposite side (180 degrees) of the disc from the magnet, there is a hole through the disc, which makes a good indexing mark to judge timing by. I would mark the factory setting before loosening the set screw so you can always get back to that original factory setting if all else fails. A few degrees before TDC seems to work pretty well.

One other aspect to note is that the needle valve fuel control is extremely sensitive, and only wants about 1/4 turn from the bottom stop on mine.

As for run times, I've run mine in excess of three hours continuous four times now, and one of those long runs actually reach the four hour mark. Gil has gotten just about five hours on a single run. The O-rings are cheap and available and easily replaced, so that shouldn't be too much of a concern, but after about 18-20 hours of run time, mine doesn't seem to need new rings yet.

Your fuel/oil mix might be a little too oil rich at 20%, but if you are happy with it, then great. I run mine closer to 5% and it seem okay, but YMMV.

Yep, these are most certainly fun little spuds, and seem to be incredible quality for the price.

Hope any of this helps!?!?
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RedRyder

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Re: Eachine ET-1 Adjustment and Fixing (fiddling)
« Reply #17 on: July 15, 2019, 05:59:33 am »
Hi Tom, 20% is too much oil. I like to run at about 20:1 which is about 5%.
You should have a lot of fun with your engine!

Kmot

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Re: Eachine ET-1 Adjustment and Fixing (fiddling)
« Reply #18 on: July 15, 2019, 09:40:07 am »
Thank you Stoker for the very detailed explanation! It's amazing to learn that you and Red Ryder have run yours 4 to 5 hours non stop! Wow!

Red Ryder, I agree and when my 500ml bottle gets down to 250ml I will refill it, making my oil content 10%. :)

Stoker

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Re: Eachine ET-1 Adjustment and Fixing (fiddling)
« Reply #19 on: July 15, 2019, 09:48:37 am »
Those run time just reflect the fuel tank capacity of about 15 ml. Jin told Gil that it is 16 ml, but I haven't managed to get quite that much into mine yet, though I do keep trying  .....    ;c)
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RedRyder

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Re: Eachine ET-1 Adjustment and Fixing (fiddling)
« Reply #20 on: July 15, 2019, 09:56:45 am »
The 16 ml included filling an empty unshortened fuel line.

Stoker

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Re: Eachine ET-1 Adjustment and Fixing (fiddling)
« Reply #21 on: July 15, 2019, 10:06:38 am »
That would be most of a ml there in the fuel line, but I don't count it because I can't keep the engine running much past the fuel line showing air for 1/3 it's length, half at best.
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RedRyder

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Re: Eachine ET-1 Adjustment and Fixing (fiddling)
« Reply #22 on: July 15, 2019, 10:24:53 am »
That would be most of a ml there in the fuel line, but I don't count it because I can't keep the engine running much past the fuel line showing air for 1/3 it's length, half at best.

I noticed the same. it could be easily fixed with a much thinner fuel line like the old electric blue 1st version had. I may experiment with a thinner tube that just fits inśde the fat tube we have now.

Stroke973

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Re: Eachine ET-1 Adjustment and Fixing (fiddling)
« Reply #23 on: July 15, 2019, 02:48:42 pm »
A little trick I have found is to spray some chain lube on the timing gears. The stuff clings so well that it looks like a belt running on the gears. As for ring binding while the green banggood replacement ring is 22x1 I have been running a single 20x1 with no problems

IndianaRog

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Re: Eachine ET-1 Adjustment and Fixing (fiddling)
« Reply #24 on: July 15, 2019, 07:48:24 pm »
I would like to replace BOTH the springs on my M90 with something that has more elasticity.  Has anyone found a commercially available source of spring that would do the trick...I would prefer to run TWO springs simultaneously vs. just removing a spring...but to do so the spring needs to allow for more stretch.

thoughts?

Rog
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RedRyder

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Re: Eachine ET-1 Adjustment and Fixing (fiddling)
« Reply #25 on: July 16, 2019, 07:46:44 am »
Rog, I found these at a local hardware store. The 2 smallest sizes of electric motor brushes have a spring that is a good fit.
You cut the spring retainer off copper wire end holding it in place. Remove the spring and cut it in half dead center. You then use 2 needle nose pliers to put a 90 degree bend on the last loop at each end. I gave $4.40 each for them.


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IndianaRog

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Re: Eachine ET-1 Adjustment and Fixing (fiddling)
« Reply #26 on: July 16, 2019, 03:24:54 pm »
Thanks Gil, never thought of using those...bet I can find them at ACE hardware local to me.

Thanks much,
Rog
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Nick

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Re: Eachine ET-1 Adjustment and Fixing (fiddling)
« Reply #27 on: July 16, 2019, 03:26:05 pm »
Clever solution Gil
Nick

 

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