mrmamiller
Petty Officer 2nd Class
- Joined
- Mar 7, 2011
- Messages
- 167
Wondering how I can tell if I am running too lean, don't want to blow the powerhead again. My spark plugs on the bottom 2 cylinders have ground electrodes that are almost white, while the upper two cylinders plugs have ground electrodes that are brown. This is only after 4 hours on the plugs, most of it at 3500 to 4500 RPM, only about an hour at low speed. Any idea how do find out if it is a lean problem? Engine is 1986 110HP, running VRO which appears to be working fine. Would I be best off to add some oil to my gas as well until I get this resolved? Maybe I worry too much. Pics of plugs on another recent thread that didn't yield too much info. Thanks, Mark