I been trying to get my 1976 Puch moped to start. I want to rule out air leaks so I made an engine leak tester.
On my first attempt, I heard lots of air escaping. So I thought it was a gasket. I heard it on the top of engine. So, I removed engine and found where the air escapes. There is a hole on the top of gear box. I assume this is normal.
Can someone please confiirm. Is this normal for the air to escape from this hole.
Second, if it’s normal, can I block and retest.
There shouldn’t be any leak, correct.
I have a feeling this is why no gas is getting into piston cylinder and why my compression is low. I may be wrong but I changed the piston rings, rebuilt carburator and still no go.
Thanks in advance