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CD150 needle/seat tool

ForzaDesign

ForzaDesign

Donation Time
Is there a special tool for the stromberg needle/seat? They don't seem to be 1/2 or 13MM. I've installed these twice now and they were buggered both times.

Thanks,
Jim
 
puff4

puff4

Platinum Level Sponsor
They are Whitworth, as are all the nuts/bolts on S.U. and Zenith-Stromberg carburettors. It's actually the only place where such fastners were still used well into the 1970's. And yes, there is a special wrench - 5/16" Whitworth, I think? - and I believe Moss sells them.

Whitworth sizes can be found by measuring the length of the flats (not the distance between/across them).
 
ForzaDesign

ForzaDesign

Donation Time
Kevin,
After much research, I believe you are correct. This is a 5/16BSW hex, .520 across flats. Ended up buying a complete set of Whitworth sockets.

thanks,
 
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