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Old 07-09-2012, 12:57 PM
gruvnfunk's Avatar
gruvnfunk gruvnfunk is offline
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Join Date: Apr 2012
Boat: X-Star 2000
Location: Midwest
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X-Star 2000 Engine Noise - LTR Northstar 330hp

While in idle my engine stars to make the noise you can hear in the video. If I give it a little gas in goes away. Any idea what this is and if it is serious?

Thanks!

http://youtu.be/H2gLjHdVUx4

http://youtu.be/H2gLjHdVUx4
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Old 07-09-2012, 02:45 PM
dummy's Avatar
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Boat: '00 MariStar 230VRS
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Sounds are kinda hard over video. Obvious thing to check would be exhaust, but the fact it goes away after you rev it up seems like a collapsed lifter to me. Once you rev it and build the oil pressure the lifter pumps back up and quiets down.

Use a long screwdriver as a stethoscope and move it around on the intake and valve cover to see if you can track down the source of the noise any better. Then pop a valve cover on the noisy side and rotate the engine to verify. You'll see one rocker not sawing as much as the others.

You can buy the roller rockers individually, but even with the roller tip you'd better track down the source 'cause you can still wipe out a cam lobe it it really is a bad lifter.

Good luck.
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engine, ltr, noise, northstar, x-star

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