seperating upper stern unit drive from housing

[stevp]

trying to seperate upper gear case from housing took the six bolts off removed the pivit bar made sure it was in forward lowered the unit tried rubber mallet still will not seperate, afraid to much banging will crack case, any thoughts would be appricated

 

[mkast]

Re: seperating upper stern unit drive from housing

Just curious, when was the last time it was off?

 

[stevp]

Re: seperating upper stern unit drive from housing

not quite sure what your asking the removal procedure came from the seloc and OMC manual for cobra 5.8. the boat is a 89 bayliner ciera 2755 that was garaged since 1995, the problem is there is no water getting to the engine, i replaced the impeller, forward and reverse works fine, WOT is fine i ran it less than 2 minute went from 160 to 200 degrees pulled the therostat houses minimal water l was very careful not to overheat, there is minimal water coming out, i replaced therostat, removed lower unit and found packed mud in pickup tube, i want to remove upper unit and replace all gaskets and inspect everything when i drained the gear oil it had a nice color, no water, no shavings, no burnt smell. just cannot seperated the upper unit from the housing.

 

[dubs283]

Re: seperating upper stern unit drive from housing

if the drive hasn't been off for a long time, or ever it is possible that the splined shaft is stuck in the coupler due to a lack of maintenence.

sounds like this is a cobra drive??

what works for mercruisers is placing a 2x4 block between the top cap of the upper housing and the gimbal ring, then rotating the drive upwards by hand until the block is wedged between the top cap and the gimbal ring

once the block is wedged, continue rotating upwards and the force against the wedge block will force the drive off

you may have to give it the tony danza (show it who's the boss) to get the drive off

 

[stevp]

Re: seperating upper stern unit drive from housing

it is a 89 cobra 5.8 last time stern was worked on was 95, as i said the boat has been garaged since 95, owner died wife sold boat to me, last year
do you think block of wood with some banging force will do it just concerned about cracking the unit

 

[madurodave]

Re: seperating upper stern unit drive from housing

tony Danza... hahahaha

seriously, I hit mine a couple times with a rubber dead blow and that did the trick.

 

[stevp]

Re: seperating upper stern unit drive from housing

thanks for everyone's input, i'm new at this and will try last post tomarrow, just got the 615 page OMC manual very detailed if anyone needs any info let me know.
tomarrow will be a new day with a whole new set of possiblities

 

[Kim1349]

Re: seperating upper stern unit drive from housing

Ah, hammer it off. I hope you've read the manual. You are talking about removing the lower unit, no?

OMC right?

NOT MERCRUISER>


The shift must be turned to the port side to get the unit apart. Read the manual before you hammer it off.

Sparks