shes a keeper
Seaman Apprentice
- Joined
- Mar 1, 2009
- Messages
- 45
hello I have a 1999 merc 115 bluewater series and I have a knocking noise around 3500 rpm .it goes away when I change rpm to about 4500 than comes back at 4500 Ithink I may have a lean condition but do not know what to do.I thought it was gas but hooked up a portable tank, does anyone have this noise and what could it be ....?????? thanks alot Mark