Originally Posted by RapidRobert
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Suddenly it starts popping loudly and intermittently out the tailpipes, kinda like shutting off, then clears up but it's a lot louder. I'm wondering what the heck caused that, when the thing's running fine.
An ign component went out makeing a part time miss on some cyls, letting unburned fuel exit from those cyls & travel downstream & the muffler ignited it makeing it explode. The coil would be my guess



That sounds like it,something shut off the ignition or spark momentarily and boom! Could even be a worn ignition switch itself.
RT