Hi, I am new to the site. I am having a problem with my 99 H2x, after the motor was rebuilt by a pretty rep. marine shop I am having a few problems, Im just wondering if anyone knows where i should start.
1999 H2x with 454 (385 HP)
1. The motor sounds a little rough at times after warming up, normally about 30 min of run time, like it's not running on all cylinders etc.
2. At wide open throttle the motor will basically shut down/ bog down (I believe around 4200rpm) Losing all power. The motor does not die but basically shuts down.
Im just wondering where to start? My guess is a fuel or ignition problem? Just wondering if someone on this forum has had the same or similar problem I am having. Any help on where to start would be greatly appreciated! Thanks again guys!