ORIGINAL: Flypaper 2
SRM 140 D is 13.8 cc Hardly worthwhile, I'm afraid.
Yeah your right, I know this engine, i know a guy who built a motorised scooter with it, has litterally 1/5 the power of a G23ORC zenoah, he ended up replacing it with a zenoah motor. The head design of these earlier Echo's and the porting design yields low performance. Now the SRM140 lives on a motorised skateboard
It's a shame, I always thought the SRM140 was a cute little motor
Years ago I had a gas scooter my old man made for me with an Echo SRM 190 (see attached pic) , that engine was 21.2cc and just didn't have much go, it was quite reliable, did 2500km (1600 miles) and cruised nicely along the flat at upto 39km/h, but had very low power and torque and would steadily lose RPM's on inclines, till I had to get off and push. Changing to a stihl slide carb helped but the whole engine design was never designed to be powerful.
You can tell this pic is old, by the wonderful quality of early digital cameras!
The engine was painted red to look pretty