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Old 06-09-2013, 11:38 AM
StrmChzr StrmChzr is offline
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Join Date: Jan 2012
Boat: 2005 XStar
Location: Midwest
Posts: 100
throttle surge

My 05 XStar with 8.1L Indmar has been acting up last two times out on lake. I do not use the perfect pass, so I use the hand throttle to "manually" control speed, rpms, etc.

Recently, when I throttle up hard to pull skier or boarders, the rpm's drop and the engine does not respond/recover until I back off the throttle and "gently" throttle up to approximately 3800 rpm's. Engine doesn't "cough" or sputter, it just refuses to accelerate aggressively.

I replaced fuel pump last summer and also had MC dealership update the software codes. In the past month, I've noticed a slight whine that I attribute to the alternator bearing going bad. Otherwise, 496 engine has just had routine maintenance and oil changes every 50 hours since I've owned boat.

Any thoughts or ideas?

Last edited by StrmChzr; 06-09-2013 at 11:51 AM.
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