Wow! 

That is strange.  My air cooled memory says just the threee. 

I wonder if it was on the outside with the crush washer and just stuck there. 

On my 1.9 I had a kind of plastic washer and I used it over and over for the 7 years I had the fan.  No leaks.  I’d kind of like to know what that was and where to get more! 

Best 

Eric Caron 

> On Oct 23, 2020, at 3:01 PM, Geoffrey Toye <geoffreytoye@GMAIL.COM> wrote:
> 
> I am cleaning the oil strainer on a 2L Type IV motor in my 1981 Westie for
> the first time (under my ownership).  I bought a gasket set that includes
> the two large paper gaskets and the aluminum crush washer.  However, when I
> took the strainer off, in addition to the three gaskets I have in the kit a
> fourth rubber washer came out?  I am not sure where it came from but it
> came out with the strainer itself.  Also, it's split and I assume it should
> be replaced. Looking at the parts catalog I have I see no mention of it.  Any
> ideas guys and girls where this goes?