2 Stroke Atco Villiers mk1 boggs and cuts out when cutter engaged
Hi,
I have just got my 1950 Atco 2 stoke with villiers mk1 engine running after about 20 years of sitting. Only one problem though, the engine boggs down and cuts out when I engage the cutter. I've just done a full carb strip with new gaskets and its made no difference, tried replacing the spark plug with a bit of success but still cuts out... It starts easily after about 2-3 kicks and revs and runs fine - no misfires or anything like that. Cutter is well oiled and fairly easy to turn by hand. The only thing I can think of is if the mixture is too rich or if the plug is the incorrect type. I use a 16-1 mixture and the plug is a champion 8 com, I've also tried it with a lodge equivalent with little success.
Thanks, Chris
Forums
All of the above but best
All of the above as suggested by wristpin but best done one at a time or you won't know which cures it.
An over rich mixture (fuel to
An over rich mixture (fuel to air ) would give heavy lumpy running and black smoke. What you have described gives every indication of the mixture being weak. Does the carb have a shutter/strangler flap to obstruct the air intake when starting? If so try it with the shutter half closed. If the carb has an adjustable needle on the float try adjusting it to give a raised fuel level and if it has a throttle slide with an adjustable needle try raising the needle in the slide.Another possibility is an air leak on the induction side.