cobra bellows

rojoc

Petty Officer 2nd Class
Joined
Aug 15, 2005
Messages
103
Changeing of outdrive bellows, is this really that difficult? Does the transome mount have to be disassembled or can they accessed with just the outdrive off? Thanks in advance.
 

Bondo

Moderator
Staff member
Joined
Apr 17, 2002
Messages
71,090
Re: cobra bellows

Yes,........<br /><br />Yes,.........<br /><br />No,... Absolutely Not........
 

Don S

Honorary Moderator Emeritus
Joined
Aug 31, 2004
Messages
62,321
Re: cobra bellows

Pull the drive.<br />Remove the hinge pins.<br />disconnect bellows from pivot housing, remove clamp from transom shield and pull bellows out.<br />Put new one in, tighten hose clamp on bellows. Secured aft bellows in grove. Install pivot pins and torque to specs.<br />Put drive back on.<br /><br />The bellows on OMC Cobra's are so much easier than anything Mercruiser it's scary.
 

olbuddyjack

Petty Officer 1st Class
Joined
Oct 23, 2003
Messages
318
Re: cobra bellows

Remove the hinge pins.<br />
Shoot Don, I did mine with the hinge pins in place. Swing the pivot housing up, remove the exaust bellows and reach up through the bottom to remove/replace the top one.<br />Piece-o-cake.
 

rbezdon

Senior Chief Petty Officer
Joined
Jun 20, 2004
Messages
689
Re: cobra bellows

ol buddy, I think that works for the exhaust bellows and the drive bellows but not for the shift bellows.
 

lakelivin

Lieutenant Junior Grade
Joined
Aug 19, 2004
Messages
1,172
Re: cobra bellows

Notes from a true beginner (little mechanical experience with boats or cars). I found replacing the bellows to be very easy. <br /><br />Although you can replace without taking the pivot housing off, I took it off cause I was replacing the transom shift cable. Didn't need to fool with the gimbal or gimbal housing. <br /><br />Removing the pivot housing was easy, just a couple of things to note: <br /><br />If you take it off you're gonna have to readjust the shift system. Shouldn't be difficult if you follow the instructions in Stuarts documentation and the Service Manual, but I still haven't got mine exactly right (of course it was off before I pulled the pivot housing; I think I might have a problem with the shift rod, will check that out later, but at least I've got things 'adjusted' so the boat is drivable for now).<br /><br />Hardest thing about pulling the pivot housing was that you need a 1/2" hex drive socket (male). Noone I knew had one, but a friend did have a weird kind of large drill bit (maybe for drilling into rock?) with a 1/2" hex shaft. We just evened the end of the shaft on a grinder and it worked great with a socket wrench (drill bit end fit in a regular socket). A chisel or something similar might have a 1/2" hex shaft if you ever need to pull the pivot housing and don't want to buy a 1/2" hex drive.<br /><br />NOTE: as stated in Stuarts documentation, the u-joint bellows is asymmetrical, i.e., it has more ribs on one side than the other. You want to position so you have the side with more ribs on the bottom to provide more flex when the drive is raised. I forgot to do that, so had to reposition the bellows after I put the pivot housing back on. As stated above, not too difficult, except getting access to bolt on the worm clamp to loosen & tighten it was a bit of a pita. You want it between 1 & 2 o'clock so as to avoid interfering with anything when turning. I needed a combination of drive extensions and a jointed adaptor to get acceptable access. <br /><br />vatter41- the shift bellows on a Cobra is inside the engine compartment at the top of the shift cable tube, shouoldn't be an issue at all w.r.t. the transom end of things.
 
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