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R16 HJB38W carb query

Posted: Sun Apr 20, 2025 9:20 am
by CSP311
My car/engine didn't come with manifold and carbs, and I purchased a manifold with 1 carb ages ago. The carb was off the manifold (it was all cheap).

The carb I have has 90 degree nozzles, has HJB38W F3 on the fuel bowl id plate, the fuel bowl connector is 90 degrees to the bowl (going to the nozzle), not angled down.

A search here says the 3 indicates roadster. Does the F indicate front carb, or how do I work out which I have, or is there no difference? As I require another carb to make a pair. The picture on the carpartsmanual site shows the carb I have, but unsure on the list of part number what is what.

Thanks in advance.

Re: R16 HJB38W carb query

Posted: Sun Apr 20, 2025 7:20 pm
by amazgjoe
The rear carb has a vacuum port on the bottom of the carb for distributer vacuum. Front carb does not.

Re: R16 HJB38W carb query

Posted: Mon Apr 21, 2025 1:06 pm
by zippy67roadster
Joe is correct that the rear carburetor has the brass barb for the vacuum line. If you need another carburetor or parts let me know. I am finishing up an early and late set of R16 carburetors now and will have them available for purchase on my site after the Solvang show this week. Check out the site at sincitydatsuns.com

Re: R16 HJB38W carb query

Posted: Tue Apr 22, 2025 7:13 am
by CSP311
Thanks both, Brian, I am putting an order of stuff from your site together, will be in contact soon.