zanderman111
Cadet
- Joined
- Mar 15, 2009
- Messages
- 28
1987 Merc 3.0 starts and idles like a dream. Shifts into gear perfect. Anything much over an idle causes backfiring and the engine just wont rev up. Timing is correct. Compression is good. Fresh gas. New plugs. Revs correctly in neutral, but when in gear above an idle it backfires and sputters around. Any ideas? Thanks!