The pin goes in the notch.
The second big thing to notice is, the pin is to keep the gap of the ring from coming past a port. So set the sleeve upright on the table and hold the piston/rod between your fingers above it. Hold the piston in the direction you assumed that it came from the engine.
Now to repeat myself, the gap of the ring must slide between the ports. So put the gap of the ring on the side of the pin that will place the ring gap between the boost and schnurle ports of the engine. You may have to turn the ring over to accomplish this?
Typically the pin goes to the left front corner and the gap in the ring goes to the right when looking down on the piston.
On the big end of the connecting rod, one side has a chamfer in the bearing hole and the other does not. The chamfer goes towards the crankshaft.
Often, there a rubbing marks on the side of the rod that goes towards the backplate on engines that have had an electric starter used on them.
I buy my rings from Frank Bowman.
Frank Bowman
1211 N. Allen
Farmington, NM 87401
[email protected]
Enjoy,
Jim