Hello,

I have a choke knob and a throttle knob on the console,

yes I added a throttle knob by myself during its restoration about 3 years ago.

But I have been thinking why there are 2 types of knobs?

The round one is original,we know we can see it in the brochure,

the square one is also from the factory but it seems later production parts?But Nov 1969 parts catalog's picture shows these knobs are square type.

Which is original for my march 1970 240Z?

Please see this,

http://www.geocities.jp/datsunz903/choke.html

Thank you,

kats

Alan,

I think you can show us the picture of choke and throttle knobs in the japanese "fairlady Z" parts catalog.

I think the drawing touch is quite different,right?fairlady Z's parts catalog show the round type knobs,I think.

Please help me Alan.

kats

Hi Kats,

OK - I just had a look at four different references for this, and none of them have good clear illustrations. Sorry.

However, its clear that there were three different part numbers for CHOKE knobs and two different part numbers for THROTTLE knobs up to 1972. That shows that the shapes changed, I would think?

Here's the illustration from the 1970 Parts List ( Japanese market ). The numbers quoted are the same for the L-series engined and S20-engined versions:

And here's the illustration from the 1972 Japanese market Parts List:

And here's the illustration from the European market Parts List ( 1972 version - which allegedly covers everything up to that date with all superceding numbers etc ):

Here's an explanation of the part numbers and their superceding numbers. Its from the Euro export market parts list:

*18415-E4100 KNOB-CHOKE manual & automatic ( up to 01-70 ).

*18415-E4101 KNOB-CHOKE manual & automatic ( 02-70 to 08-71 ).

*18415-E8700 KNOB-CHOK ( sic ) manual & automatic ( 09-71 up ).

*18515-E4100 KNOB-THROTTLE manual ( up to 01-70 ).

*18515-E4101 KNOB-THROTTLE manual ( 02-70 to 08-71 ).

So, the very earliest knobs were very possibly a more rounded shape than they later became.

Hope this helped, Kats.

All the best,

Alan T.

Kats

I'd agree with Alan on this one. It seems 'accepted' that the very early cars had the rounded knobs which are therefore much more difficult to find. I have never seen a rounded throttle lever knob for sale but I have seen the occasional rounded choke lever knob for sale.

I've just bought a throttle cable unit off ebay that has the more square knob. Probably correct for my April 1970 car. I don't know what came with mine originally as it did not have a choke lever knob when I bought the car.

regards

Andrew

Kats

Just curious, but what is the plaque on the centre console just in front of the choke & throttle levers on your car?

regards

Andrew

Alan

Thanks for posting the pics of the hand throttle linkups. I was about to post a thread to find out it connects up, as neither of my cars had a throttle lever originally.

regards

Andrew

The NOS assembly I bought a couple months ago is 18410-E4601. Pic attached. It has square knobs.

that complete NOS choke/throttle setup that went on ebay recently for $530 I think had the round knobs. If someone knows who the buyer was maybe he would divulge the part number for it?( if it was still in the original packaging) Be interesting to see if it was the same number as MDbrandy's.

For the complete assemblies ( not just the knobs );

*18410-E4103 ASSY-CONTROL, THROTTLE & CHOKE manual ( 05-70 to 02-71 ).

*18410-E4104 ASSY-CONTROL, THROTTLE & CHOCK ( sic ) manual ( 03-71 to 08-71 ).

*18410-E8700 ASSY-CONTROL, CHOCK ( sic ) manual ( from 09-71).

*18410-E8701 ASSY-CONTROL, CHOCK ( sic ) manual ( 06-70 to 06-72 ).

*18410-E4502 ASSY-CONTROL, CHOKE automatic ( up to 08-71 ).

*18410-E8700 ASSY-CONTROL, CHOCK ( sic ) automatic ( from 09-71 ).

*18410-E8701 ASSY-CONTROL, CHOCK ( sic ) automatic ( from 07-72 ).

*18410-E8801 ASSY-CONTROL, CHOCK ( sic ) manual & auto ( from 05-72 ).

I would presume that any other numbers would be later "superseding" numbers.

Alan T.

Hi guys,

Her Majesty the 26th has round knobs. I'm sure I can confirm rounded knobs with the other early cars. Evidently, it was quite fashionable to have rounded knobs in the early days!

The part number discrepancy between Mark's piece and Alan's description list is so typical Datsun. I am not surprised. It can easily be surmised that specific parts did not appear in an orderly progression of production numbers and dates / models. However it is quite evident that the squared knobs appeared later and replaced the original production of the rounded type. So many bits of the very early cars are unique, one might suggest that the first productions were of limited quantity and that the second orders for these parts were made with slight modifications. Perhaps the result of a comment made during a press release coctail party!

In my opinion, the hand throttle is so unique that any knob shape is an interesting detail for a car. The knobs, like many other interior components, were made with a plastic that resembles "Bakelite", an older composition material. The only glue that will work to repair this material is "Superglue".