engine noise

  1. M

    Engine loud and revs to 8000 rpm

    I have a 2009 Challenger 180 215. Friday I took it out after replacing a cracked intercooler hose and it ran fine (7800rpm, engine at normal operating level as far as sound goes) today (Sunday) It idled fine but once I got it to about 1/2 the throttle level position and 5500 rpm there was a lot...
  2. L

    Soundproofing 2011 SeaDoo Challenger 180SE

    Looking to reduce engine noise, I began by finding the best material I could work with. I purchased QUIET BARRIER® Specialty Composite from American Micro Industries, Inc. <www.americanmicroinc.com> where I bought 2 sheets. (I might add more in the future), but this has really reduced engine...