Removing lower unit from Upper unit Mercruiser

[KingFloyd]

Hello everyone. I have a 1979 Searay with a 898 mercruiser and it seems my water impeller is shot. (I didn't winterize-HOW STUPID). I removed the outdrive from the boat. Then removed the 5 nuts holding the lower unit to the rest of the housing. Removed the proppeller, but couldn't find anything in the housing that I could remove.
Unfortunatelly the lower unit is still steadfast to the rest of the housing.
Can someone please tell me what I should do to be able to separate the lower unit from the upper one.

 

[ziggy]

Re: Removing lower unit from Upper unit Mercruiser

go get yer service manual in the adults only sticky for your rig.
in the s/m you'll find where all the bolts are...
i'm assuming a 1 drive for '79...
remove trim tab thru hole in upper. underneath the trim tab is one more cap screw. then 2 nuts underneath the vent plate that are visible . 2 on top of the vent plate that are visable, and one in the ft by the shift shaft. so. 2 cap screws. 5 nuts..

 

[FreeBeeTony]

Re: Removing lower unit from Upper unit Mercruiser

did you remove the bolt under the trim tab?

 

[FreeBeeTony]

Re: Removing lower unit from Upper unit Mercruiser

try this.............http://www.mercstuff.com/waterpumpinst.htm

 

[KingFloyd]

Re: Removing lower unit from Upper unit Mercruiser

Thanks a million. I downloaded the manual for my boat( all 1.6 Gigs of it) and nothing in there about separating the lower unit. Could you please be a little more specific about the trim tab in the upper unit. I didn't see anyhing like that. The 5 nuts are off.
Thanks again

 

[FreeBeeTony]

Re: Removing lower unit from Upper unit Mercruiser

check out the link..............shows everything

 

[KingFloyd]

Re: Removing lower unit from Upper unit Mercruiser

Thanks a million. I'll let you know how it worked out

 

[ziggy]

Re: Removing lower unit from Upper unit Mercruiser

or

in serice manual #4. pp 3A2 and 3A3....

 

[KingFloyd]

Re: Removing lower unit from Upper unit Mercruiser

Thank you all . Especially FreeBee Tony. It worked out perfectly

 

[KingFloyd]

Re: Removing lower unit from Upper unit Mercruiser

Thank you too Ziggy. You were all very helpful. It's nice to know there is a comradery among boaters

 

[FreeBeeTony]

Re: Removing lower unit from Upper unit Mercruiser

Glad I could help...............this is a great forum............lots of help available here.

 

[KingFloyd]

Re: Removing lower unit from Upper unit Mercruiser

I'm putting the outdrive back together (attaching the lower unit to the upper one) and noticed there is no gasket between the lower unit and the upper one. The sales clerk at the marina told me there is no gasket in between them. Can that be? What is it supposed to keep the water from coming into the lower unit?

 

[JustJason]

Re: Removing lower unit from Upper unit Mercruiser

there is no gasket but there is a quad ring seal. (basically a special o-ring) that needs to in between the upper and lower oil passages.