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Old 04-16-2013, 10:24 PM
Clarkgriswald Clarkgriswald is offline
TT Newbie
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, 10:42 PM
Aric'sX15's Avatar
Aric'sX15 Aric'sX15 is offline
MC Addict
Join Date: Nov 2007
Boat: 85' S&S
Location: DFDUB
Posts: 5,791
id go for prop and shaft, easiest visual check. I dont think it would be motor mounts.
"if one day the speed kills me, do not cry because i was smiling." -Paul Walker
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Old 04-16-2013, 10:45 PM
east tx skier's Avatar
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: 25,475
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 Closed Bow Ski Boat, Ford 351, 310 hp, Acme 4 blade, Perfect Pass SG.


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To me, this forum is about love of inboard boats. It is about the sharing of information and, on a good day, some humor. It is not about post count, brand of boat, or any other superfluous labels that lend themselves to a false sense of superiority. Please, respect one another, try to pass on accurate information, and keep your eye on the ball.
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