OMC Cobra 3L 4cy

[Rod116]

Just bought a used boat, it is a 89 Donzi Ragazzi with the OMC Cobra 3l 4cy I/O. No owners manual of course. I was wondering what the specs were on this motor. also, the prop is in rough shape and I was looking to replace. Need some advise on a replacement. Cannot find any serial numbers on the prop itself, need to know, dia. and pitch suggested. Might go stainless but not sure if it is worth while. Not looking to be the fastest on the lake but a little extra kick out of the gate when pulling a skier would be nice. your thoughts?

 

[The Marine Doctor]

Re: OMC Cobra 3L 4cy

You can purchase a manual here at Iboats.<br /><br />As for the prop...get it rebuilt...then give it a try. Before you start thinking of spending money on Stainless.<br /><br />SST can be a huge expense if you hit a rock.<br /><br />TMD

 

[cobra 3.0]

Re: OMC Cobra 3L 4cy

The prop may have the number on the inside where the bolt and nut is. I have a 14 x 17" pitch prop on a 16' open deck boat. It works very well, but Ì am going to try a 19" pitch stainless(waiting for delivery) soon. I am hoping to get more top end without sacrificing acceleration by going stainless. <br /><br />Only use stainless props in waters that are deep enough and that you are familiar with.