O-Ring/Washer for lube change screws - 1990 Cobra

[dodge1930]

Hi,

OMC 1990 3.0L Cobra, (302BMRPWS)

Need to know the size and type of O-Ring/washer, used when changing the lube in the outdrive.(Two bottom screws)
Locally I've been given two different size from two different dealers.
So which is the right one?

Rubber O-Ring 11mm OD 8mmID

Plastic Flat 15mm OD 9mm ID

Thanks
Steve

 

[Reinell-BRXL-191]

Re: O-Ring/Washer for lube change screws - 1990 Cobra

You are being given 2 different sizes, because you need both.. the upper fill plug requires the O-ring - the lower drain plug requires the washer..

 

[bruceb58]

Re: O-Ring/Washer for lube change screws - 1990 Cobra

The fill plug and the drain plug both use the same washer. You also need to replace the o-ring on the dipstick.

Item #54 is the washer
http://www.marineengine.com/parts/o...ion=Lower+Gearcase+-+Standard+(r.h.)+Rotation

#9 is the o-ring
http://www.marineengine.com/parts/o...er=OMC+Stern+Drive&section=Upper+Gear+Housing