sometimesfly
Heliman
Location: Sherman, Texas
| I have had my Raptor 90 standard for over 2 years now, and I have loved it. I started with an OS 91, had some initial run issues that a perry pump fixed. I ran that engine until it could do no more. I needed a new inexpensive option and purchased a TT Pro 90 for my scale MD 500. It ran very good over past year until a recent leaning out problem. The engine suddenly leaned out and toasted the insides. I like the TT pro 90 so well I decided to purchase another engine. I cannot get the second TT Pro 90 to tune. I have it choking on fuel and it still runs very hot to the point it is detonating. It is running so rich that my helicopter is totally covered in fuel and it will still run hot. I pulled it out of the helicopter and after only 3 tanks of gas I have piston sleeve scarring. This new engine is on its way to totally burning itself up. I have tried to contact ace hobby without response. I have never had a more difficult engine to tune in my life.
I don't want a really expensive super powerful engine, I would rather have dependability and ease of tuning for a scale helicopter. What would you do? Purchase an OS or YS? Trust this lemon of an engine to my scale Raptor 90? |
