radio_controlled_mad

last few days engine is losing power top end - tried stripping and clening carb,adjusting needles ect but still the engine dies / loses power top end.then engine itself aint that old and only had a few hours use (zen rc260) and cant think what else it could be!!!!

Dr.ArmoMaxx

i have the same prob

http://www.rcuniverse.com/forum/m_3296353/tm.htm

mightycasey

Proper break in is important as well as correct oil mix. I have had no problem with a Zenoah motors.

freedom69

hi i did have same prob... cleaning carb, air fiter etc no luck!! so all i did change a new piston ring. running perfect

voo2doo

Try changing the plug ,worked for me with the same prob
Regards
Vo0[&:]

JQuest64

While I am not all that familiar with the 1/6 motors yet, what you are describing is a classic case of worn piston/sleeve in nitros, or a weak plug. I am sure the symptoms are the same in these mills.

Change the plug, see if it helps.
If not it may be time for a rebuild. Do you have anyway to check your engine compression?

jeepfreak1972

What air filter do you use and are you using the proper oil for it? The K&N I owned sucked dirt and so did most of my friends. Foam is the way to go in dusty conditions. Get enough dust in and power goes away.

p113

i find it can happen if you dont let the engine idel when starting from cold although you can run it there is usually a difference in power when its had time to heat up befor a run

and by the way how many hours should i change the piston rings

radio_controlled_mad

think i will try that - engine is only few hours old but i didnt follow correct break in procedure - hope it is ring that just damaged.