DevilDog3521
New Member
Hey all, newbie here. Just bought an 89 Marathon electric to gas conversion, with a Kohler engine, haven't yet had the time to figure out exactly what engine it is. The guy did a really good job, IMO, all the fabrication work looks really good, however, it's LOUD. I'm assuming the muffler is just the normal Kohler small engine muffler. Anyone have any suggestions on aftermarket mufflers to quiet this thing down without creating excess backpressure? I'm a competent welder and fabricator, so, I'm not worried about the work.