The perfect power for your next 90 size helicopter. ASP engines bring power and reliability at a affordable price tag. Featuring a dual ball bearing supported hardened steel crankshaft, oversize finned cylinder head, and a footprint that is compatible with most 90 size airframes, this is the perfect engine for all applications. Designed for 15~30% nitro, with 20~23% oil content.
• Bolt pattern fits most popular models
• Oversized finned cylinder head for optimal cooling
• Easy tuning carburetor
• Ringed piston gives power andexcellent longevity
RPM: 2,000 ~ 17,000
Muffler Bolt Spacing: 37mm
Have this now flying and it is an excellent engine....plenty of power and good idle was easy to set up and after flying about ten tanks of fuel it seems to have broken in just fineHave this now flying and it is an excellent engine....plenty of power and good idle was easy to set up and after flying about ten tanks of fuel it seems to have broken in just fineI just got this engine ....I have liked the ASP engines that I have had before and I am hoping this one will be just as quality an engine as the otherslike this engine a lot....just wish it came with a muffler.....wish I could fine a pitts style muffler to fit the exhaust port....I am using it in a plane....seems to be the same as the plane version except for the bigger headMotor muito bom, usarei em aeromodelo, porém terei que fazer uma modificação na porca que prende a helice, usando a porca e arruela do motor quatro tempos, pois o eixo é um pouco mais curto.Performante motore da 15,16 cc per modelli di elicottero classe 90 non'ha niente da invidiare a motori molto pi blasonati e costosi ottimo rapporto qualit prezzoasp91 heli engine.it is the same dimensions as my os91hz.it does not come with a muffler.overall it is a pretty good engine but it has one minor flaw.the pin that you tighten up to hold the carby in leaks fuel.its as if the hole for the carby locking pin is a touch too big.i sorted this out by cleaning with wax and grease remover and using some of the red heat proof silastic and put it on both sides of the pin including the nut side as well.it idles really well and my one runs like it has a bit of a miss just off idle but this is probably due to it being run in and running really rich.it seems very responsive and overall I am happy with it for the low price.im not into 3d I just fly calmly around.i have it installed in a tz90.