OMC Cobra Propeller Choice Power Up

cslaufer

Cadet
Joined
Jul 5, 2005
Messages
25
Hi all, I've just Imported a 1988 Bayliner Advanti 2950, Powered By a Pair of OMC Cobra 230hp 5Lt GMC from the USA to Australia.<br /><br />When she arrive the propellers that were on her were gone, some one stole them, anyway after completing compressions test on both the motors I decided to replace them with a Pair of Vortec 350 GMC Marine engines (rated at 315hp) and the exhaust now runs Thru Hull. <br /><br />Now this is my Problem, Because I'm finding it near impossible to find out what the standard size propellers were for this boat (It's near impossible to find any info on bayliner here in Aust.) It's really a stab in the dark for me to choose which Props to buy?<br /><br />I want to use a 4 or five blade prop with about a 14.5" Dia but what pitch?????? Going by my Knowledge, maybe a 19P or 21P???<br /><br />Can anyone shead some light on the orginal size?<br />Thanks Cam.
 

tommays

Admiral
Joined
Jul 4, 2004
Messages
6,768
Re: OMC Cobra Propeller Choice Power Up

make a good friend at the prop shop and borrow ;) <br /><br />i am really not kidding if you have to buy every set you try that is going to get really costly<br /><br /><br />tommays
 

olbuddyjack

Petty Officer 1st Class
Joined
Oct 23, 2003
Messages
318
Re: OMC Cobra Propeller Choice Power Up

I'm not sure what it came with new but a friends 32' Avanti with twin Cobra 260's runs with 15X17's
 
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