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Old 05-05-2013, 10:56 AM
96 190 96 190 is offline
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Join Date: Feb 2013
Boat: 1996 prostar 190 efi 350
Location: Northwest
Posts: 3
sporadic engine knocking

2005 X9. so at idle, it seems to miss a bit, with a slight knock when it does. it will rev up fine in neutral, with no knock. but at idle it has a slight miss and a knock about every 3 seconds. when accelerating, it knocks sporadically. when cruising on a plane, it seems fine until you give it more gas, then the sporadic knock. I know what pinging sounds like; this isn't that. any ideas?
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Old 05-05-2013, 12:32 PM
96 190 96 190 is offline
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Join Date: Feb 2013
Boat: 1996 prostar 190 efi 350
Location: Northwest
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actually, i need to add to this. the "knock" that i am describing at idle might be described as more like 'thunk'; when kneeling next to the engine you can physically feel it, like something is hitting the engine. every 2-3 seconds.
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Old 05-05-2013, 02:31 PM
96 190 96 190 is offline
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Join Date: Feb 2013
Boat: 1996 prostar 190 efi 350
Location: Northwest
Posts: 3
okay, found the prob and posting it for whomever may be trying to diagnose same symptoms. my "helper" (i will refrain from other adjectives) put the new distributor cap on and had the 3 and the 6 on the wrong terminals. switched them to proper- runs great.
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