RCU Forums - ASP Engines

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- - ASP Engines (https://www.rcuniverse.com/forum/glow-engines-114/9072315-asp-engines.html)

Looking for some input, Now that the 25FX is not being made and the AX version is allot of money with less power of the FX, I'm looking for other choices.
I use these in combat and want to try the ASP 25. I know there cheap but don't mind buying one to give it a go.
Where can a order one from in the USA?
and Has anyone ordered from these guys, http://www.himodel.com/rc_cat/engines.html (thought I'd ask).

Thanks John

Hi

Look on Ebay. There is a ASP engine seller there in the engine section, but it will come from China. 2 to 3 weeks for delivery. They have good feedback and will be way cheaper than that UK outfit !!!! be careful ordering from them at the current exchange rate !!

Vince

TRY www.justengines.unseen.org

I've ordered from them, the shipping, follow up, and service is great

Watch the exchange rate!

My friends here almost everyday ordering some goods incl. ASP engines from HiModels and they happy with them.Reliable and fast service.You can order with full trust.My firends prefer EMS shipping,fast and cheaper.

ASP are great engines, I have many. Himodel are nice people to do buisness with. Go for it;)

ASP is marketed under the brand name of Magnum in the USA whether you use HiTec or JUst Engines UK is a decent Engine the 25 from JUst engines is 39 GBPs remember you have to knock off the 15% VAT tax does not apply to US sales thats about 34 GBPs times the exchange rate to USD even if around 1.5 (guess) maybe 52 to 55$ price range all mine came from Just Engines 2 and 4 strk great service and fast delivery martin

Thanks for the replies..... Will order from Himodels.

John

i have three ASP 25 2c
3 ASP 15 2c
1 asp 52 2c
2 asp 61 4C
1 asp 52 4c

because i'm in china ,ASP is very cheaper,and parts supply is sufficient.
Most ASP engine is clone OS engine and run well , but not everyone is good.

I've got an ASP 52 four stroke, super little engine in a Seagull Spacewalker. Starts and runs well. I did have a problem with the exhaust port working loose and losing compression and power but a replacement from Just Engines cured the problem...on closer inspection of the new head it has been modified and redesigned so as to stop the port leakage........nice touch from ASP to improve the product and cure a fault.

That's been a problem with them for years

ASP engines are an excellent value but the bearings in them are poor quality. The retainers have the folded tabs and can fail.

...you should check the screws periodically.

If you are ready to order an engine overseas, you may have a look at the Japanese model shops too. For a very good price, you could get an O.S engine.

Wow! But postage from China probably jacks it up a lot, right?

While higher than from some other places, the EMS postage from China isn't that bad and it is very quick in delivery.

Ed Cregger

I have yet to see or touch a ASP engine that I didn't have to tinker with and fix the carb on. Actually so far all the mainland Chinese engines have had flaky carbs on them. I must have bad luck and only see the engines they make just before the weekend starts.

Someone had two of these ASP .61 four cycle engines and they were simply not working well at all. So he asked me to help him out. We took the engines off his twin engine plane so i could bench run them. Both engines ran horrible, false needle settings, rough running, you couldn't lean them out, and even then the engines' RPMS were all over the place, up and down.

So I got to take apart the carb on one of the ASP 61 four stroke engines. I found a tiny burr on the tip of the main needle. So I used a extra fine stone hone to gently and carefully remove the burr. I tried to get a pic of it, but without a 8x magnifier, it is hard to see, but you can feel it with the fingers. The idle jet rod was sort of, kinked off center a little, so I straightened it. The O-rings look OK. But as a test, I used some silcone grease and carefully greased the O-rings, and threads on the needle valves and reassembled the carb. i will try it out again on the engine stand tomorrow sometime. I'll see if that helped or not. I also thought about the carb's barrel throttle, but it seems to be a fairly tight fit, so sucking in air around the barrel may or may not be likely.

http://i248.photobucket.com/albums/g...FS_Carb_01.jpg

http://i248.photobucket.com/albums/g...FS_Carb_02.jpg

http://i248.photobucket.com/albums/g...FS_Carb_03.jpg

http://i248.photobucket.com/albums/g...FS_Carb_04.jpg

http://i248.photobucket.com/albums/g...FS_Carb_05.jpg

http://i248.photobucket.com/albums/g...FS_Carb_06.jpg

http://i248.photobucket.com/albums/g...FS_Carb_07.jpg

http://i248.photobucket.com/albums/g...FS_Carb_08.jpg

http://i248.photobucket.com/albums/g...FS_Carb_09.jpg

http://i248.photobucket.com/albums/g...FS_Carb_10.jpg

I tried to get a pic of the burr on the needle tip. You can just make it out as a faint line sticking up slightly on the lower edge of the tip in this pic.
http://i248.photobucket.com/albums/g...FS_Carb_11.jpg

http://i248.photobucket.com/albums/g...FS_Carb_12.jpg

http://i248.photobucket.com/albums/g...FS_Carb_13.jpg

http://i248.photobucket.com/albums/g...FS_Carb_14.jpg

http://i248.photobucket.com/albums/g...FS_Carb_15.jpg

http://i248.photobucket.com/albums/g...FS_Carb_16.jpg

http://i248.photobucket.com/albums/g...FS_Carb_17.jpg

The next day...
OK, I saved the ASP 61 four cycle engines and made someone very happy as the engines now work very well.
First problem was the guy had used old glow plugs. I made him go and get a couple of new Fox Miracle glow plugs for the engines. Second problem, I had to sleep on it, but I decided the engines had lower compression than I am used to. So I broke out a jug of my old 20% nitro glow fuel (16%synthetic and 2% castor oil). Then last night I had lightly greased the O-rings on the carbs and ground down a burr on one needle valve tip and straightened out the idle jet needle on one carb. I also added a piece of silicon tubing on top of the needle valve where it screws into the carb as well.

Then then I fired the engines up, they ran like I expected them too. Solid and firm, no funky stuff like false needle settings and so on. The main needle valve was sucking air pretty good. The 20% nitro made them run good too. I think the compression was lower, more in line with USA consumer needs as everyone likes to run a lot of nitro over here. My normal fuel choice is FAI or 5%, which is what I use all the time for most purposes.

Now the engines are running pretty good. He can put them back into his airplane now, knowing they'll work OK. They still seem to smoke at just off of idle, but they idle good in either case. Now we can see how long the engines hold up a last as he uses them. If he doesn't crash and total out the engines, we'll find out if they case hardened things like the camshafts or whether the crank bearings wear out prematurely.

Before the changes to fix the engines. You couldn't get a consistent tach reading at all usually you couldn't get a tach to read over 9.3k rpms but the readings were jumping all over the place. Now the engines hold a pretty solid 10.1k to 10.2k RPMS using a Zinger 11x7 wood prop on 20% nitro fuel.
Since the carb is working OK now, one can probably run lower nitro fuels. But I didn't test that thought. 15% Nitro fuel is very likely OK.

http://i248.photobucket.com/albums/g...FS_Carb_18.jpg

http://i248.photobucket.com/albums/g...FS_Carb_19.jpg

That is a small piece of extra large silicon fuel tubing on the needle valve like shown here.
http://i248.photobucket.com/albums/g...FS_Carb_20.jpg

Here is a short video clip (1 minute 28 seconds in length) of one of the ASP .61 four cycle engines I bench ran.
[URL=http://s248.photobucket.com/albums/gg171/earlwbollinger/Newer%20Engines/ASP%2061%20Four%20Cycle/?action=view&current=ASP61_Bench_test_Run.flv[/URL]

s248.photobucket.com/albums/gg171/earlwbollinger/Newer%20Engines/ASP%2061%20Four%20Cycle/

Hi, is the silicone tubing on the needle valve to keep it from moving or to stop the air leak??

Yes the silicon tubing helps to prevent the needle valve from sucking air into the fuel stream. As a side effect it prevents the needle from turning as well. Mainly with the tubing in place the detent spring is sort of disabled.

So far on all the Chinese engines I have seen, the needle valve lets air get sucked into the fuel stream, this results in rough running, false needle settings, and poor engine performance obviously.
But some people have been luckier and have gotten engines that worked OK and had decent carbs to start with. Just not me.