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  #1  
Old 09-03-2014, 03:22 PM
LCA1971 LCA1971 is offline
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Join Date: Aug 2014
Boat: 03 X30 MCX
Location: Xenia, OH and Norris Lake, TN
Posts: 23
Engine won't rev past 2500RPM

Ok guy's, I've read all 50 page's of the "fuel pump 101" sticky. I think I might have it narrowed down to (best case) water in the fuel, bad gas or (worst case) bad fuel pump/filter! So I would like to run it by you guys and see what you think!

Got the boat in the water, it started fine and idled @700rpm. Put it in reverse and it died. Had to start it two more time and give it more throttle to get it to not die. I think it might have just been cold. Idled fine after that @700rpm. After getting everybody settled, idling out of the no wake zone, gave it about half throttle and the engine was very sluggish. It would not accelerate past @2500rpm, then rpm would start to decrease from there. Then engine would start to backfire through the ext. I pulled the throttle back to idle and tried a couple more times. No luck! Thought it might be the Perfect Pass, so I turned it off and tried again with the same results. Engine comes up to @2500rpm, then rpm falls off to @1500 (maybe lower, can't remember the exact rpm it falls off to) and starts backfiring and running like crap, until I pull it back to idle! Then run @700 just fine! 03 X30 with the MCX eng.

This boat is new to me and it was the first time I had it out! Any help would be greatly appreciated.

Thanks Chris.
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  #2  
Old 09-03-2014, 06:56 PM
LCA1971 LCA1971 is offline
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Join Date: Aug 2014
Boat: 03 X30 MCX
Location: Xenia, OH and Norris Lake, TN
Posts: 23
Anyone???
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  #3  
Old 09-03-2014, 07:15 PM
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Rossterman Rossterman is offline
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Join Date: May 2012
Boat: 2001 prostar 205V
Location: Westcoast
Posts: 681
Check fuel pressure at injector rail as first step. You want to make sure no drop in pressure while under load.
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  #4  
Old 09-04-2014, 06:52 AM
Xjet2011 Xjet2011 is offline
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Join Date: May 2012
Boat: Previously owned 1986 Skier. Current boat 1990 Prostar
Location: S florida Lake Okeeheelee area
Posts: 55
Water in fuel can make similar issues.
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