Thanks for all the suggestions and support regarding my backfiring B and S engine on my Ariens. Ariens sent my concerns to Briggs. Briggs emailed me back saying they would contact the dealer to resolve the issue. 10 days later I still have no response. Unfortunately, we haven't had any snow here so I haven't had a chance to try the machine more to see if the backfiring diminishes. It's been a frustrating experience so far with Ariens and Briggs.
Joed- I had an issue with a Kawasaki powered mower that was still under warranty. The mower manufacturer told me that engine issues were handled by the engine manufacturer( Kawasaki) and to contact them. It didn't make me happy but I have come to learn that's pretty much standard in the Outdoor Power Equiptment industry. In addition I learned that the Kawasaki engine warranty in this case was a year longer than the mower guarantee. That did make me happy as you can well imagine. It turned out that there was a defect in the connecting rod on the Kawi which caused the wrist pin to seize . Kawasaki replaced the engine.
Since Briggs responded to you work with them. The only issue as I see it is that Briggs sent you back to your dealer.Did Briggs mention anything about the cam change? You should share that information with them. If they say they know nothing about it ask them for another dealer. If your dealer has been BSing you I wouldn't want him to touch my machine.
Even though there is no snow you can run a test on your machine. Start it up and let it run until the choke is no longer required. That should take no longer than a minute and then shut it down. The engine will not be hot relative to it's temperature if you just finished an hour of throwing snow. If it doesen't back fire on the "cold" shut down then there is nothing wrong and letting it idle for a minute or two before shut down when hot will most likely "cure" the back fire issue.
Lastly-It occurs to me that the unit in question is new which means evrything from the engine to the frame is tight and therefore it is possible operating temps could be higher than when the unit is fully broken in. As you can see I believe this is a temperature related issue. For the mean time I would make sure the oil is up to the proper level and use the machine when necessary. Change the oil at the five hour interval and wait to see how your inquiry plays out with Briggs. You may find the back fire goes away as the machine "breaks in".
I am curious as to Briggs' verifying the cam replacement as well as what the cure is to your issue.
Please keep us informed,
Marc
This message was modified Jan 15, 2010 by mml4
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