So I have a Stihl MS 391.
I have the chain oil valve fully open and the oil tank drains along with the fuel tank during use.
I verify oil gently sprays a surface if i rev the throttle with the chain spinning an inch or 2 away from that surface
I'm using Stihl's bar & chain oil sold at my local dealer yet I've noticed what's depicted in these photos...
this can't be normal...
I hypothesize that it is adding tension on the chain, resistance when it spins... which could explain the diminished performance i am observing....
i seriously can't be over-tightening the 2 nuts that hold the chain sprocket cover on / bar in-place... all i am using is the Stihl scrench and tightenting until it's snug...
any advice?
I have the chain oil valve fully open and the oil tank drains along with the fuel tank during use.
I verify oil gently sprays a surface if i rev the throttle with the chain spinning an inch or 2 away from that surface
I'm using Stihl's bar & chain oil sold at my local dealer yet I've noticed what's depicted in these photos...
this can't be normal...
I hypothesize that it is adding tension on the chain, resistance when it spins... which could explain the diminished performance i am observing....
i seriously can't be over-tightening the 2 nuts that hold the chain sprocket cover on / bar in-place... all i am using is the Stihl scrench and tightenting until it's snug...
any advice?