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Old 04-16-2013, 11:24 PM
Clarkgriswald Clarkgriswald is offline
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Join Date: Apr 2013
Boat: mastercraft,prostar 190,indmar
Location: indiana
Posts: 3
vibration at low rpms

I recently purchased my first inboard, 91 ProStar 190. I took it out for the first time yesterday and it has a vibration at low rpms. Not sure where to start is it a prop , shaft , motor mounts I just don't know. Can anyone offer some advise?
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Old 04-16-2013, 11:42 PM
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MC25 MC25 is online now
MC Master Poster
Join Date: Nov 2007
Boat: 2016 X30, 85 S&S
Location: Grapevine, Texas
Posts: 15,160
id go for prop and shaft, easiest visual check. I dont think it would be motor mounts.



2016 X30-Wetsounds galore
2017 Misty Harbor Tri-Toon
1985 S&S- Gone but never forgotten
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Old 04-16-2013, 11:45 PM
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east tx skier east tx skier is offline
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Join Date: Jul 2004
Boat: 1998 Ski Nautique
Location: End of my rope.
Posts: 26,185
Check your prop for any imperfections, however slight. Use a feeler gauge if you can get one to check the runout on the shaft. Check the strut bearings. Before digging into the rest, when was the last time you changed your packing material. My brother in law's Supra had some vibration issues and, surprisingly, it was the shaft packing.
Previous: 1993 Prostar 205

Red 1998 Ski Nautique, PCM GT40, 310 hp, , Acme 4 blade, Perfect Pass SG/Zbox.


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