I just installed a new spark plug (the recommended plug) in a Honda HRT16 lawn mower (bought at Home Depot). This plug was used once and ran OK. The second time the mower sputtered and quit. When I checked the plug, it was covered with heavy black carbon. I noticed this on two previous plugs; once last summer and once the summer prior. Is the mower running too rich? If so, how do I correct this? Any other suggestions? Thanks.
- posted
17 years ago