Hi there...
Need help
my es 250/2 engine has been restored before 6000 km,bearings,seals,piston,crankshaft have been replaced.
Powerdyanmo 12v 180w has been installed.
Metal rattling noises started coming from the engine a month ago.
the sound is only present when I apply a full throttle,engine is hot,only in 3 and 4 th gear.
and only between 4300-5100 rpm
example...I am driving 60 km/h in the 3 rd gear
and then I apply full throttle
while accelarating,the engine produces this rattling metal sound between 4300-5100 rpm
It souns like this:
https://www.youtube.com/watch?v=lGC51mIQylkHow can I fix it?
Things that I have tried:
-Switced from bvf 28n to 30n
-more 2 stroke oil
-checked the gearbox oil,
-replaced the spark plug
-tried to set ignition a bit forward and rearward
-removed the cilinder and cilinder head and did an inspection of piston,piston rings,piston and crankshaft bearing
All this things did NOT help.
My next step is to replace piston bearing.
Do you have any idea???