Discussion Starter · #1 ·
I have a Z445 with Briggs & Stratton engine. It recently had a surging issue, but I took apart and cleaned the carb, which fixed that problem. Now the engine sounds fine in neutral but when moving, it seems to run more slowly than it should. Has new spark plugs, filters (air, fuel & oil), oil changed, new trans belt, fresh gas. I also followed the procedure to purge air from the trans system. Not sure what else to do.