Shortmorris Posted July 28, 2020 Report Share Posted July 28, 2020 I looked around a few of the carb threads but didn't find anything necessarily relating to my situation. I recently bought a 79 Datsun 620 and while it runs pretty well, from what I can tell, there are a few things I know need to be addressed. The first and foremost is the throttle linkage to the carburetor. It looks to be a Weber carb, but the connection to which the throttle cable connects is some Jerry rigged shenanigans. It's pieced together with some bolts, flat pieces of metal and a cotter pin that dangles over some components. It has already caught ones for me, and once for my friend that helped me buy it. When it catches it is at about 1/3 throttle and won't let go easily. My question: Is there a part I can replace this nonsense with or do I need to replace the whole carburetor? *I'll post pics in a few minutes when I get back to my computer* 1 Quote Link to comment
ducky Posted July 28, 2020 Report Share Posted July 28, 2020 Looks like your picture is dead, friend. You can buy throttle linkage kits on eBay and whatnot. Obviously, you'd have to make it work, but at least you'd be using components made for the purpose. 1 Quote Link to comment
Shortmorris Posted July 28, 2020 Author Report Share Posted July 28, 2020 6 hours ago, ducky said: Looks like your picture is dead, friend. Like you can't see the picture? I am new to this forum host and it was a bit of a pain to post a picture. It shows up for me when I open the thread... 1 Quote Link to comment
Pacific coast Datsun Posted July 28, 2020 Report Share Posted July 28, 2020 www.piercemanifolds.com should carry the throttle linkage kits + many other parts. Ive bought 2 carbs from them last year..great prices..fast shipping & great tech support. 1 Quote Link to comment
ducky Posted July 29, 2020 Report Share Posted July 29, 2020 19 hours ago, Shortmorris said: Like you can't see the picture? I am new to this forum host and it was a bit of a pain to post a picture. It shows up for me when I open the thread... Correct. Looks like a broken link. I like to use imgbb for hosting. Might want to try that. 1 Quote Link to comment
Shortmorris Posted July 31, 2020 Author Report Share Posted July 31, 2020 I think I found the part/parts that I am looking for but is it a Weber thing or an original Hitachi carb thing? The part I am talking about is the 1/4 circle the end of the cable attaches to and any parts that attach it to the carb. Quote Link to comment
datzenmike Posted July 31, 2020 Report Share Posted July 31, 2020 Hitachi had those on trucks and later Datsun cars. The 510/610/710 were linkage.. Probably from a DCH 340 Hitachi 1 Quote Link to comment
banzai510(hainz) Posted July 31, 2020 Report Share Posted July 31, 2020 3/4 circle??? the Hithachi has a bar with a hole for the cable and a slot to get the cable in. to make fit a weber one has to oblong the holes so that cqble holder will fit on the weber. What I did is that and also drilled a new cable hole so the cable goes straight into the cable puller slot so its not at a angle. or one can buy the weber version and it fits on the weber carb spacing and your done already 1 Quote Link to comment
Stoffregen Motorsports Posted July 31, 2020 Report Share Posted July 31, 2020 A Weber linkage piece will have some degree of adjustability. Yes, you can use an OEM part, if you can find one. 1 Quote Link to comment
Shortmorris Posted August 8, 2020 Author Report Share Posted August 8, 2020 So I haven't changed anything on the carb yet but it started idling at a high rpm. Without taking the carb of or apart it appears everything is still operating properly, the choke is open all the time though. The idle speed screw is not touching the lever, and I tried turning in the idle mixture screw (less fuel?) And it continues to idle high. Is there anything else I should check before pulling things apart? Not sure if it matters but a cap that was on the valve cover PCV connection feel apart right around the time I noticed, but putting my finger over it doesn't seem to change anything. 1 Quote Link to comment
Shortmorris Posted September 7, 2020 Author Report Share Posted September 7, 2020 I ordered a rebuild kit for the 32/36 DGV. I was sent a 38/38 DGEV rebuild kit... The part numbers are different but are they still interchangable? 1 Quote Link to comment
banzai510(hainz) Posted September 7, 2020 Report Share Posted September 7, 2020 Only thing worth replacing is the needle valve and a cell pump diaphrame those might be the same call them 1 Quote Link to comment
Stoffregen Motorsports Posted September 7, 2020 Report Share Posted September 7, 2020 a cell pump diaphrame = accell pump diaphrame = accelerator pump diaphragm Just giving you a hard time Hainz. Quote Link to comment
banzai510(hainz) Posted September 7, 2020 Report Share Posted September 7, 2020 GF iphone 1 Quote Link to comment
Shortmorris Posted September 24, 2020 Author Report Share Posted September 24, 2020 On 9/6/2020 at 6:38 PM, banzai510(hainz) said: Only thing worth replacing is the needle valve and a cell pump diaphrame those might be the same call them I finally got ahold of them and they sent it a replacement kit. I was looking through the different parts before sending the 38 kit back and noticed the part number for the accelerator pump diaphragm were the same but there were two different version. Would there be any reason to keep one over the other? Quote Link to comment
yenpit Posted September 24, 2020 Report Share Posted September 24, 2020 Well, I was gonna razz you to buy a new accelerator cable before you do anything else, but looks like the 620 cable is NLA! I wonder if the LATE 1979 cable would work, as listed on RockAuto OR the EARLY 1980 720 with the L20B? I can see that the 720 (oval plate with two screws/bolts) mounts to the firewall differently than the 620 (thumb screw like a speedo cable), but we use the 720 style of cable mounting when we do a CA/SR/KA swap in a 510, so I know it can be done. The 1981-on 720 is a NAPZ engine, so the cable is waaaaaaay longer to reach over to the passenger side where the carb is. Hainz said it best..........modify a stock Hitachi bellcrank to fit the Weber or just buy the NEW Weber bellcrank. If you need a stock Hitachi bellcrank, I have some, but cost & shipping likely equates to just buying a NEW one from Weber! Quote Link to comment
Shortmorris Posted September 25, 2020 Author Report Share Posted September 25, 2020 Well I technically still need to get one of those too. I've seen about there different types so far, is there a particular one that is better and doesn't have to be modified to work with the stock cable or can be used with a cable that doesn't have an end on it? https://www.weberperformance.com.au/product_info.php?products_id=836 https://www.piercemanifolds.com/product_p/99007.551.htm https://www.pegasusautoracing.com/productdetails.asp?RecID=181 Quote Link to comment
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