mikehoover
Well Known Member
I have a Slick impulse mag on the left and a Pmag on the right. During my run ups, I am used to having a 60 rpm drop when the left Slick mag is grounded, and a 90 rpm drop when the right Pmag is grounded. This is an O-320-D1A from Vans and has performed well for 115 hours (minus the right side Slick mag failure at only 11 hours.)
Recently, I noted that my left Slick mag started dropping on run up to about 120 when I was used to it dropping about 60. Also, there is an abrupt jerk when I switch off the mag in run up and had intermittent skipping. We removed the mag to find a light coating of oil on everything. It was cleaned, a contact kit installed and remounted on the engine. When running up, I get the same 120+ drop but the intermittent skip is gone.
All through this, the Pmag is performing as expected.
One other thing is that when I pull the throttle all the way out, the rpm is dropping to around 550 rpm where I am used to 650.
Can this be a coil or capacitor problem in the Slick?
Recently, I noted that my left Slick mag started dropping on run up to about 120 when I was used to it dropping about 60. Also, there is an abrupt jerk when I switch off the mag in run up and had intermittent skipping. We removed the mag to find a light coating of oil on everything. It was cleaned, a contact kit installed and remounted on the engine. When running up, I get the same 120+ drop but the intermittent skip is gone.
All through this, the Pmag is performing as expected.
One other thing is that when I pull the throttle all the way out, the rpm is dropping to around 550 rpm where I am used to 650.
Can this be a coil or capacitor problem in the Slick?