gasket

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dbocha01

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Aug 24, 2009

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14

• Sep 25, 2009

• #1

Rebuilding a Mercruiser I , 150 HP, 1966-67 (?) sn2020415

Do I need a gasket between the upper and lower units of the sterndrive?

 

Fishermark

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Joined

Oct 19, 2003

Messages

5,617

• Sep 25, 2009

• #2

Re: gasket

There is no gasket between the upper and lower. BUT there is a "quad ring" - it is like an o-ring that seals the oil passage between the two halves.

 

D

dbocha01

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• Sep 25, 2009

• #3

Re: gasket

where is the quad ring then, i didnt think oil went between the two halves of this model.....I have an oil fill and vent plug on top half and bottom half

 

Apollo75

Petty Officer 1st Class

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Sep 2, 2009

Messages

272

• Sep 25, 2009

• #4

Re: gasket

Looking from the rear it is on the right side about even with the water pump in a little 3/8" or so wide grove cut into the lower unit top housing.

There is an oil lube passage from the top to the bottom units --- this little ring seals the passage.

OFM

-----------------------------------------------------------
If the boat is not sinking or on fire, Relax

 

D

dbocha01

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• Sep 27, 2009

• #5

Re: gasket

I didnt see this oil passage....will it hurt anything if I cat a gasket and put it between the two halves?

 

Fishermark

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• Sep 28, 2009

• #6

Re: gasket

You don't need to cut any gaskets - BUT YOU DO NEED THE QUAD RING. There really is an oil passage there. I will try to find and post a picture.

 

JustJason

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Aug 27, 2007

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5,319

• Sep 28, 2009

• #7

Re: gasket

Identify what you have first... The very first drives used seperate oil chambers and did not have a passage.
According to my notes pre 68 drives do not have a passage.
You can give this a read.

http://www.4shared.com/file/113520171/2d55a0e5/alpha_drive_history.html

 

Apollo75

Petty Officer 1st Class

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272

• Sep 28, 2009

• #8

Re: gasket

Great job JustJason

I learned something today


OFM

 

Bondo

Moderator

Staff member

Joined

Apr 17, 2002

Messages

70,510

• Sep 28, 2009

• #9

Re: gasket

Apollo75 said:

Great job JustJason

I learned something today


OFM

Click to expand...

Ayuh,... Leave it to the Kid to know about the Antique drive's peculiarities,....

 

JustJason

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Joined

Aug 27, 2007

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5,319

• Sep 28, 2009

• #10

Re: gasket

Ayuh,... Leave it to the Kid to know about the Antique drive's peculiarities,....

Click to expand...

That was just useless fact #21557824 that was floating in my brain when I stumbled upon this thread.
You think i'm a nerd now... you should see me yell at the tv when i'm watchig Jeopardy.

 

Fishermark

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Oct 19, 2003

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5,617

• Sep 29, 2009

• #11

Re: gasket

Fishermark said:

You don't need to cut any gaskets - BUT YOU DO NEED THE QUAD RING. There really is an oil passage there. I will try to find and post a picture.

Click to expand...

Oops! Well, I didn't read the link that Jason shows yet, but I guess I need to go back and do some more reading myself! :redface:

 

D

dbocha01

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Joined

Aug 24, 2009

Messages

14

• Sep 29, 2009

• #12

Re: gasket

Thanks Jason....there def is not an oil passage...I inspected it last night closely, after wire brushing and scraping with a razor, no hole. Ok so no gasket between the two halves then. Thanks guys