J'ai reu mon moteur rcemment et je ne peux juger de la longvit cependant la facture est excellente il n'y a pas de prsence de copeaux ou limaille dans le moteur comme cela tait le cas dans beaucoup de mthanol. Ce moteur a une belle finition et les ajustement et usinages sont dans les standard de ce type de construction. la mise en route est aise et le fonctionnement exempt de vibrations comme on est en droit de l'attendre. bref il n'y a pas de mauvaise surprise (en tous cas rien de ce qui a t crit dans certains forum ou l'on peut ce demander si ceux qui crivent ont dj vu ce moteur.I bought one of these early in the flying season and I have been very pleased. I have mine mounted to a top flite giant corsair, it fits entirely enclosed in the cowl. It will also fit entirely within the cowl of the FW 190 and the P-47. I have all 3 and wondered. It in a great running reliable engine with a 22x10 prop. The mounting bolts seem small, but the thing runs so smooth I don't have the slightest concern any longer. Fuel consumption is the same as any single cylinder engine of the same displacement. roughly 1 oz per minute when wide open. TL;DR Buy it, great sound and great performance.Mucho me cost comprarlo, casi 5 meses y luego 20 das para recibirlo dentro de otra caja con accesorios varios y todos en perfecto estado. El motor, dentro de su caja, me lleg golpeado en las aletas de refrijeracin y una partida. No parece ser producto del viaje hasta mi pas, parece haberse golpeado en su propia caja antes de que lo enviaran, una lstima. Lo dems se ve bien, de buena calidad y habr que probarlo en funcionamiento a ver si mejora mi humor. Saludos!Nice little engine, running really smooth. Pulls a 22x10 easily. Will start any time by hand. Some little problem: out of the box the pressure connecting tube of the carb was kinked - easy to replace. Next the carb didn't want to pump fuel on the first trys, later it worked fine. Then the pick-up sensor quit after about 1 hr of operation: engine started to sputter, wouldn't get to high rpm and quit suddenly, but could be restarted. Took me a while to verify it was the pick-up, but then repair was done in minutes. Now it runs like new again. Have it in a 80" homebuilt Giant Stick.This is an update of the 53 cc twin that I purchased 2 yrs ago. After approx. 50 flights and numerous dead stick landings; some of which didn't end well, including the last one, this engine gave up and ceased to go. Upon pulling the engine down it was discovered the big end bearing had let go, sending small shards of metal into the cylinder head. I was very disappointed with the result as I had done everything by the book, as far as correct running in, using top quality oil, only to find that this motor is let down by cheap chinese bearings. Cut a long story short, eventually found parts elsewhere as typical Hobbyking style, that don't back up their engines with spare parts. The crank shaft was replaced as big end bearings are pressed in at factory, new rings, new Japanese bearings. Engine runs strong again; but in the future I will probably stay clear of xyz engines and buy better known brands. A good learning experience for me.The motor I received is only rated at 5 HP and 52.6cc's according to the owners manual and does not come with the clear plastic wire wrap as pictured.HK wake up!Verarbeitung scheint gut zu sein. Ein Freund hat in schon eingebaut. Der Auspuff ist zu laut. Eventuell ei Resorohr dazukaufen. Auf jeden fall einen Auspuff/Muffler mit Doppelkammernsystem kaufen als Ersatz fr die beiden mitgeliferten.I have been setting mine up for my 1/6th Sea Fury. Easy to start ran with little effort after a few flicks. Not yet run in I get 6450 rpm with a Turnigy 21x8 wood prop. the engine is really well finished. Would buy another. This engine just fits in the cowl of the radial engines Fury.Great engine! Starts easily, just choke it until it fires & then un-choke it set 1/4 throttle, a couple turns of the prop and it starts right up. If you have trouble starting pull off the fuel line blow slight pressure into the fuel tank until gas comes out of the line & then start the starting procedure. It idles good runs smooth. It goes from idle to full throttle with out hesitation. Mine came too rich on the low speed needle I turned it in 1/8 turn. I haven't touched to High speed needle. I'm using Klotz oil @ 28 to 1. I've got 4 flights on my Yak 55 w/ 88 inch wing span-weights 17 lbs. Fits in the cowl w/room to spare. My club members can't get over what a tight package a 53 cc. twin cylinder can be.Great engine. Hand starts and runs smooth. I have it on a 16 Pound Low wing trainer type airplane. I'm getting 7,500 RPM with a Classic 20-10 prop. I'm using NGK CM 6 plugs and a 2 cell 850 mh lipo battery with a 5 volt regulator. I'm using 87 octane gas and running 40-1 oil. Had lots of problems when I first got the motor and ran it on my test stand. I found that you can not use a NIMH battery. A soon as I switched over to a more stable battery the problems dissappeared. I would highly recomend this motor to anyone. Twins are so smooth and sound great.