Aisin pipes to nowhere question

[djc]

Hi all, trying to improve cold start on my Aisin (good once warm) and discovered 2 pipes coming from lower casting. Checked on the how-to guide and that carb has them as well. they join and go onto the casing low down near back of carb on rocker/mani side.
Here is a pic of my 2:

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here is the same thing on the how-to thread:

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There is no sign of any pipes come away and hanging - any idea what they are for, should I ignore...??

[stevepsj413]

Hi, im not 100% sure but i think these are for coolant to circulate round the carb. Ive done away with standard carbs and swapped to webers but still have the old ones in my garage. Looking at one of these, the pipe that points upwards joins back to the carb near the top just above the throttle cable, and from memory the other joins back to the inlet manifold to circulate coolant, think this runs the original choke on the aisin carbs so it might have been blocked due to the chokes being famously bad.

[djc]

Thanks Steve - that sounds quite likely, and fits with the rubbish cold start. So I'll go looking for a water out from the manifold which will have been blanked off. Someone did this ages ago so a fair guess the auto-choke wasn't behaving anyway. I may need to live with the bad cold start anyway, and I do plan an SU soon as. All the sooner at this rate

edit, just found this looking foer SJ specific aisins (seem to have used different ones on Toyotas a lot)

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