powerstroke6ltr
Bronze Member
- Joined
- Feb 1, 2005
- Messages
- 62
Hi. I took off the head off of my 21hp gas tractor motor and found that the exhaust valve had an irregular look to it, it wasn't just convex. It had hard lumps on it, and they were gray/whitish. Is this a burnt valve, and what are problems i may run into with it in the future? The opposing cylinder had no problems, just a lot of carbon build-up. Thanks...P.S. is briggs and stratton considered an ecomony enigne, while a yanmar diesel is like a higher class? thanks /forums/images/graemlins/confused.gif