AGM30 Gas engine
#327
My Feedback: (19)
Leave the spring in place. Tests have shown it takes very little more than idle current for the servo to hold against the spring. Metal gears probably a good idea but not 100% necessary if a good quality servo is used. In general, I'd recommend the same type of servo you are using on the control surfaces .... the throttle is as important as any function on the airplane. Just be sure you don't stall the throttle servo linkage against the stops on the carburetor or you can damage the servo.
#328
My Feedback: (5)
#330
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The last problem, I still not solve properly is: the pitts style muffler bolts loosening, time after time. Somebody brings me into the right way? Just note that: the spring washers are pressed, and do not look as been before, I mean they do not look as a spring...By the way, bought new ones from the Stainless steel, may they help? What if I do locktighten them ( feel too much stress them:-))?
Last edited by Valius; 04-28-2015 at 08:51 AM.
#334
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Join Date: May 2002
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I had the same problem. The tubes in the muffler that the bolts tighten down on are to soft, they get barrel shaped and you can see the side of the muffler caving in. Had to tighten bolts after every flight. The way I fixed mine was to use a stack of fender washers, small to big so they tightened down on the outer edge of the muffler. I may have used longer screws, don't remember. I think I put a spacer like a wheel collar where the head of the original socket screw was so it could tighten against it also. The good pitts mufflers use a shorter screw and do not crush the tube. Would send a picture but cowl is on. Bottom line AGM pitts are pretty and shinny but are crap.
Last edited by jerryj39; 04-28-2015 at 05:45 PM.
#336
Join Date: Dec 2014
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AMG 30cc Throttle extension arm
I am plagued with the same AMG throttle arm and choke arm both being on top of each other. In your picture your throttle arm extension looks great; where can I get one please?
#337
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Join Date: Nov 2004
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{DLE carb like} without the automatic crapp,or detent stuff ball/shaft and spring from another valbro carb same size and design will work, you figure it out by looking at that stuff. the automatic release is close to useless in R/C but easy to fix for this aplication
even buying a junk carb with regular choke makes it worth doing that conversion
even buying a junk carb with regular choke makes it worth doing that conversion
#338
Join Date: Apr 2010
Location: wesson,
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{DLE carb like} without the automatic crapp,or detent stuff ball/shaft and spring from another valbro carb same size and design will work, you figure it out by looking at that stuff. the automatic release is close to useless in R/C but easy to fix for this aplication
even buying a junk carb with regular choke makes it worth doing that conversion
even buying a junk carb with regular choke makes it worth doing that conversion
#339
Join Date: Dec 2014
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Hi guys. Having alot of the same issues with my new AGcM 30cc, V-2. Have been trying to figure out how to connect the throttle linkage and deal with the overlapping throttle and choke arm issues. Here is my solution after much thought and trial and error: I do not use the auto lock open choke feature. I installed a servo for the choke, leaving the choke spring installed. To open the choke the servo pulls. I have found this after market throttle arm extension on Ebay to solve the throttle and choke arm collision that was plaguing this engine. [http://www.ebay.com/itm/291138122556...3AMEBIDX%3AIT] All is good now. I don't know why AGM won't deal with this issue and at least recommend this option even if they don't want to include the throttle arm extension with their engine.
Breaking it in with a 18-6. It ran for about 40 minutes on the stand on 8 ozs of 93% octane with NO ethanol and 50 to 1 Stihl HP Ultra (FULL) synthetic oil. Amazing! It is going into a Fly Model MXS-R for it's maiden in about 10 days.
Breaking it in with a 18-6. It ran for about 40 minutes on the stand on 8 ozs of 93% octane with NO ethanol and 50 to 1 Stihl HP Ultra (FULL) synthetic oil. Amazing! It is going into a Fly Model MXS-R for it's maiden in about 10 days.
#340
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that 3d xoar is labor propp anyways and does not spool up to good for 3D, best trust 19X6 hands down ( i like the Vess, but its noisy), check the timing, sound like slightly retarded, i run mine on DLE specs
#341
I used a servo for the choke and mixed the throttle with the choke operation. The throttle servo moves the throttle far enough open to allow the choke to operate. I'm using a JR XG11 Tx and put the choke on a 3 position switch. This gives me full choke, half choke and no choke with an increased idle speed for either of the first 2 cases. Works well especially being able to use half choke when the engine is either cold or luke warm.
Amazing value and great power output.
Amazing value and great power output.
#342
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Join Date: Aug 2002
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I have an agm 30 with an agm 18x8 prop and pitts muffler. I am only able to get 6300 rpm. I tweaked the needles as much as possible and that is all I get. It starts, transitions and runs great but won't get above 6300. I advanced the timing as much as I could but still no improvement. Anybody have any ideas?
Any help would be appreciated.
Jeff
Any help would be appreciated.
Jeff
#343
Join Date: Apr 2010
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Try to get your money back they are a joke. I have the same problem. They have just about replaced every part for mine and every new part Has a blemish or flaw.and these parts are straight from agm.cracked crankcase. Pitted cylinder and now my new cylinder came with a large chip in the chrome plating.after more emails they have said try it lol and they would improve there quality.what a joke. I told them to send me a dle cylinder and they stated it cost more.ughhhhhh just wished I would have spent $50 more on a dle.
#344
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Join Date: Aug 2002
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Aaron,
Thanks. Let me know how it turns out. My first reply from agm was to use an 18x8 prop and set the needles. That was of course what I had already done. I may try swapping out another ignition to see if that could be limiting rpm. It really starts and transitions great. Pretty disappointed right now. They really seem to be hit or miss.
Thanks
Jeff
Thanks. Let me know how it turns out. My first reply from agm was to use an 18x8 prop and set the needles. That was of course what I had already done. I may try swapping out another ignition to see if that could be limiting rpm. It really starts and transitions great. Pretty disappointed right now. They really seem to be hit or miss.
Thanks
Jeff
#346
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I just ran mine for the first time a week ago. Started and ran great. Only tweaking I had to do was to adjust my high end needle 1/8th turn out! Idles perfectly and ran up to full rpm perfect too! Running it with an 18-10 prop 6v battery on ign. ran it for 30 min and didnt even use 12oz of fuel. I have my fuel mix at 32-1 ratio and I have no complaints.... going to be flying this engine on my Ohio Models built up Cap 232 for the first time this coming friday and saturday!!! ill take some video hopefully and share with you all...
Jon
Jon
#348
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I thought I would give a quick update for those considering the AGM. Mine appears to have low compression and therefor low power. I am getting only 6300 on an 18 x 8 prop. I am confident in my needle settings. Brand new NGK spark plug is the right color so I am happy with the tuning. I took the cylinder off last night and found significant side wear on the piston. Enough that you can actually feel a step that has been cut in the piston. Also there appears to by significant blowby. I am not sure if the cylinder is out of round or what but there is polishing around the ports and I think witnes marks where the ring may not be staying in contact with the cylinder further up the bore. Like the bore is out of round or maybe just a low spot. Having said all that, it is super easy to start and it transitions great. Top end power sucks. I compared the feel of compression to an OS 33GT that I have and the difference in compression is night and day. My AGM is weak.
I am in contact with the manufacturer and so far they have been responding. I would like them to send a good piston and cylinder. We shall see...
I am in contact with the manufacturer and so far they have been responding. I would like them to send a good piston and cylinder. We shall see...
#350
My Feedback: (5)
This is why I was holding off buying one early last year to see where the company/product was headed.
Maybe it is just a case of selling out and waiting for a container to arrive or something worse. Member "AGMUSA" company rep/owner who was active in this thread has not been on for almost a year.
Maybe it is just a case of selling out and waiting for a container to arrive or something worse. Member "AGMUSA" company rep/owner who was active in this thread has not been on for almost a year.