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Briggs OHV & Vanguard / Re: model 28 wont start
« on: April 27, 2013, 03:19:59 pm »
I am having the same issues as you. If you have tried everything you can think of externally, it could be a worn cam or valves not closing properly. I know the AVS motors are notorious for the cams wearing.
The 28 cu. in. AVS motor I have seems to point to the cam or maybe the valves not closing properly. I have replaced the flywheel key, spark plug, swapped carb with a known working one, checked compression, made sure the spark was adequate, made sure the push rods were straight, and adjusted the valves to spec. The engine still backfires through the carb. The motor is getting torn down next, unless someone knows something else I may have missed.
Matt
The 28 cu. in. AVS motor I have seems to point to the cam or maybe the valves not closing properly. I have replaced the flywheel key, spark plug, swapped carb with a known working one, checked compression, made sure the spark was adequate, made sure the push rods were straight, and adjusted the valves to spec. The engine still backfires through the carb. The motor is getting torn down next, unless someone knows something else I may have missed.
Matt