Omc Cobra Outdrive Help Needed

[cslaufer]

Hi, I have just began to rebuild the upper unit on my 1988 omc cobra 5lt 230hp. I bought the books and I have all the parts. I'm not new with rebuilding outdrives I'm just looking for someone who Know's what the pre-load on the bearings should be on the yoke and waterpump shaft bearings and the bearings which are in the bearing carrier that hold the vertical gear. <br /><br />Thanks

 

[tommays]

Re: Omc Cobra Outdrive Help Needed

if you dont have a manual with the specs and the correct order to do things in it would be hard to rebuild them correctly<br /><br /><br />tommays

 

[cslaufer]

Re: Omc Cobra Outdrive Help Needed

Thankyou for your insight, as I 've stated, I have the manuals, I would just like a second persons opinion as 5-6 ftlbs of torque on the waterpump shaft bearings seems a bit high.<br /><br />Thanks

 

[tommays]

Re: Omc Cobra Outdrive Help Needed

if you have something like a clymer manual VS the orginal that may be a problem the clymer tends to have mistakes and cover to many different drives<br /><br /><br />tommays

 

[Lou C]

Re: Omc Cobra Outdrive Help Needed

From my 1988 OMC shop manual:<br />U-joint shaft should have zero end play, if not re-shim<br />Correct upper gear backlash is .009in to .015 in (0.23 to 0.38 mm)<br />Upper gear rolling torque (hold upper unit with u-joint shaft hanging down vertically)<br />spec for rolling torque of the shaft is 4-20 in lbs (o.5-2.3 NM)<br />Hope that helps. The set up on these seem complex, like setting up a rear drive differential on a truck.