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Carburetor help

Tech Talk for Suzuki owners.

Moderators: lay80n, sierrajim

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Posts: 52
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Carburetor help

Post by Farmz »

I need a picture of the standard Seirra carburetor with clead view of the vacuum hoses. I did some servicing on my Samurai, and disconnected the hoses without noting what hose went where. (yeah i know...extremelly STUPID).
Hope someone on here can post a pic so i can see.
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Post by Libber »

yeah i have the same problem. English and american manuals are useless in trying to work it out. Would be great if someone could post a pic or a diagram.
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Post by want33s »

What brand of carby do you have?

Here in Aust we only got the Aisin which is different to the U.S market.
Jas.
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Post by zook4fun »

a pic of the aisin would be good for every one here
cheer up emo kid
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Post by want33s »

This might help.
Image
Last edited by want33s on Sun Aug 10, 2008 10:01 pm, edited 1 time in total.
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Post by Farmz »

Well I have a SJ80, which never went to the US, so i assume I have the Asian, and judging from the diagram it seems to be the same.
Thanks a bunch!
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Post by Libber »

yeah thanks for that, I have the Aisin one
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Post by want33s »

No worries... I found it in a Google images search of "Aisin carb"..
Only took a minute. ;)
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Post by RockHopper »

Tell me something. Does anyone know what the 2ndary actuator actually does? I 1st thought it was a vacuum operated secondary, but later discovered there is a mechanical linkage that opens the 2ndary's if that diaphram wasn't there or if it has held open
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Post by want33s »

Just going from memory here........
I think the linkage (cam and arm) is only there to make sure the secondary closes when the primary does, not to open it.
Jas.
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Post by suzimad »

it is vacuum operated secondary , the other bit you are talking about serves 2 purposes , firstly it stops the secondary opening under 1/2 throttle , secondly it closes the secondary on deacceleration.
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Post by RockHopper »

ok, what I don't understand is, with the cover off the carburettor so I can look down the throat, if I rev the crap out of the engine, I don't see the secondary's opening, but if I cable tie the diaphram into the open position, the secondarys work fine. Also, I've checked the diaphram with a vacuum gauge and it is working ok, and I've blown out the vacuum port with compressed air and it is clear, but still no secondarys. Could it be that the secondarys only open under load?? The car seems to go marginally better with that diaphram held open, but that could just be my imagination :roll:
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Post by lay80n »

RockHopper wrote:ok, what I don't understand is, with the cover off the carburettor so I can look down the throat, if I rev the crap out of the engine, I don't see the secondary's opening, but if I cable tie the diaphram into the open position, the secondarys work fine. Also, I've checked the diaphram with a vacuum gauge and it is working ok, and I've blown out the vacuum port with compressed air and it is clear, but still no secondarys. Could it be that the secondarys only open under load?? The car seems to go marginally better with that diaphram held open, but that could just be my imagination :roll:

The secondarys open under load, when you free rev the motor there is no load, so there is no need for the extra air and fuel that teh secondarys provide.

Layto....
[quote="v840"]Just between me and you, I actually really dig the Megatwon, but if anyone asks, I'm going to shitcan it as much as possible! :D[/quote]
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Post by suzimad »

^^^ this man knows his shit ...

try this .. you may need a mate to help . undo the vacuum hose to the secondary ... hold open the primary (get your mate to put his foot flat to the floor on the throttle) pull up the secondary rod and put your finger over the vacuum line hole .. does it move a short distance and stop , then when you release your finger return ?
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Post by RockHopper »

lay80n wrote: The secondarys open under load, when you free rev the motor there is no load, so there is no need for the extra air and fuel that teh secondarys provide.

Layto....
Thanx. Just what I needed to know. I recall the vacuum secondarys on the old Mitsubishi Sigma motors used to open the secondarys when free revving, and I expected that these Aisin carbies worked the same way. However when I road tested with the diaphram held open, and found no real noticable power increase, I began to wonder if they only opened under load.
@ Suzimad I tried that with a mightyvac, and yep, the diaphram is holding.
Thanx guys. Having always owned bigger, more powerful cars, and having only owned my zook for a couple of weeks, I'm still not entirely sure about how well it's supposed to perform. I did'nt expect a powerhouse when I bought it, I'd just like to ensure that it goes at least as well as the way mr Suzuki had intended it to.
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