j.8 Veteran Location: Denmark
My Posts This: Topic Forum | Hi
I thought it was a new engien, my mistake.
On a broking in engien you don`t want a 4 stroke every 10 second, all the time when it`s warmed up, but you can ajust the needles so that is 4S every 10 second and then dissapeares when the engien is warmed up
If you can`t hear the engien 4 stroking, you can se it, the tail will wag to one side, every time it 4 strokes, due to the loss of momentum, and the wag will be to the opposite side as the rotor direction
6 oz pr gallon is close to 5 % personally I think it`s alot of oil, I use 2 % but you would have to be carefull not to run an engien lean with a 2% mix. Some people mix the oil content so that the plug get`s a certain colour, (do a search on spark plug colour)
Actually if you use to much oil, you`ll have to lean the needles to much, to get a clean engien sound, but a lean setting will heat the engien to much.
And from your discription it sounds as if the engien was getting to hot, so start by riching the needles.
Oil do not cool anything in a 2 stroke gasser engien, well if you don`t use any oil at all, you`ll have a lot of friction witch will kill the engien, due to the heat but it don`t have the same cooling effect like on a methanol/nitro engien.
Oil in theise engiens have 2 funktions 1 lubicant 2 it preserves the engien, when it`s not beeing used
Have you tried with a new spark plug ?
Regards Bo |