jhotch
Seaman Apprentice
- Joined
- Jul 4, 2020
- Messages
- 35
Motor idles well and runs fine until 2000 rpm and then starts surging after 15-20 seconds. Redid entire fuel system. Set linkage as per manual. Jumps right up onto plane and then starts surging. Today I started investigating ignition. Idle timing is at 4 atdc . All plugs had good spark. Dropped each cylinder in idle and the second cylinder had no change, in fact if anything it ran a little better. Changed the plugs between middle and bottom cylinder and the middle cylinder still did not change idle when pulled. Any ideas?