BSA Owners' Club Workshop Discussions

The BSA Workshop => Twins => Topic started by: Dibble on 13 Sep, 2021, 19:00

Title: Engine mounting spacers
Post by: Dibble on 13 Sep, 2021, 19:00
At long last the hornet engine sits loosely in its frame. My queerie this time is about the spacer(s) which are missing from the bottom mounting stud. There doesn't seem to be any clear indication in the parts book as to their dimensions or indeed their exact location! The front mounting seems snug enough. S hould i just measure carefully  the left and right gaps and manufacture spacers to suit?  Any advice gratefully recieved. Thanks Dave.
Title: Re: Engine mounting spacers
Post by: chaz on 13 Sep, 2021, 21:36
if I havnt got the originals , which I would remake in stainless anyway, yes, I would snug front and back and measure both sides and make new ones. If you dont have the machines I have packed with a stack of washers in my earlier years
Title: Re: Engine mounting spacers
Post by: Mike Farmer on 14 Sep, 2021, 10:34
 :) :) :) :)

Hi. Would you care to be more specific cos I cant see what spacers you are refering to. Perhaps its my age?????

Mike 8) 8) 8) 8)
Title: Re: Engine mounting spacers
Post by: Dibble on 14 Sep, 2021, 10:58
Hi Mike sorry to confuse. I refer to the bottom engine mounting stud,the long one.part no 68 4260. The manual refers to a spacer which i have missing! There is a definite gap on both sides more pronounced to the right. Just wondered if it the obvious answer was to measure and make up new ones? Thanks for your thoughts. Dave
Title: Re: Engine mounting spacers
Post by: DAVE BRADY on 14 Sep, 2021, 11:09
Hi,

1970 parts book 27-5676 Spacing washer x 4.  No dimensions given but I would think 2 each side. 
It does show this spacing washer outboard of the washer for the nut but this is probably a miss-numbering.  The dimensions for the washer 02-1733 are given as 3.8"x13/16"x1/16".  I would think that, as has been suggested, use this size to fill the spaces without pulling the frame in.

Dave.
Title: Re: Engine mounting spacers
Post by: Mike Farmer on 14 Sep, 2021, 11:35
 :) :) :)

I just looked at the earlier parts book and it gives 3/8th x 1". I assume thats 1" OD with a 38" centre. Doesnt give a thickness.

I do up the front cross bolt/stud. Do up the rear bracket and pack to fit. with minimum frame "squeeze".

Mike 8) 8) 8) 8)
Title: Re: Engine mounting spacers
Post by: Dibble on 14 Sep, 2021, 15:26
Thanks one and all. Another problem sorted! Dave
Title: Re: Engine mounting spacers
Post by: mr.moto on 15 Sep, 2021, 16:20
The standards manual gives 27-5676 as being:
i.d .380"
o.d. 1.00"
thickness .092"
material E.N.2