Frank Acampora
Supreme Mariner
- Joined
- Jan 19, 2007
- Messages
- 12,004
A while back I rebuilt a 3 cyl. 60 or 70 hp Rude looper for a friend. It ate a reed and ruined a piston and head. Unfortunately I don't remember the exact year or hp size.
While I had it apart, I noticed a small drilled hole in each cylinder wall about 1/2 inch above the exhaust ports. These holes entered the exhaust runners. The engine had cast in, equal length exhaust runners surrounded by the water jacket.
What was the reason for these holes? The factory obviously put them there for a reason.
While I had it apart, I noticed a small drilled hole in each cylinder wall about 1/2 inch above the exhaust ports. These holes entered the exhaust runners. The engine had cast in, equal length exhaust runners surrounded by the water jacket.
What was the reason for these holes? The factory obviously put them there for a reason.