Wow I can tell you I sure didn't WASTE FUEL AND GLOW PLUGS on this boat and engine. Been fun this summer running and setting up but is running in the hi 70 MPH range didn't gps to date but very fast with the ASP 90 engine in it. Not a speedy engine BUT for $140.00 bucks BRAND NEW with a pipe she rips. The engine is broken in and has well over a gallon of fuel through it and still running the same glow plug. So not a waste of GLOW PLUGS, or FUEL as some people would have you believe.