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-   -   Need help with 76 mazda cosmo (https://www.rx7club.com/old-school-other-rotary-63/need-help-76-mazda-cosmo-1169563/)

mafiascrub Mar 26, 2025 12:18 AM

Need help with 76 mazda cosmo
 
Hey so i bought this 1976 Mazda cosmo about a week ago. The carb is all fucked up. Cleaned it and its still not getting any fuel in the motor. I have a old nikki of my rx 7 before i fuel injected it. Is there any mounting plate i could buy for a nikki or a weber?

73rx313b Mar 27, 2025 07:00 AM

No mounting plate needed.
Just carefully mark new holes for the studs, drill and tap them and bolt on the Nikki.
I do have an old complete Hitachi if your interested, shoot me a PM.
The biggest issue with the Hitachi is the accelerator pump.
Did you buy the red one owner one?
Post pics!

mafiascrub Mar 27, 2025 06:08 PM


Originally Posted by 73rx313b (Post 12626844)
No mounting plate needed.
Just carefully mark new holes for the studs, drill and tap them and bolt on the Nikki.
I do have an old complete Hitachi if your interested, shoot me a PM.
The biggest issue with the Hitachi is the accelerator pump.
Did you buy the red one owner one?
Post pics!

I can post pics later just working at O'Reillys right now but the old accelerator pump had the leather ripped but I got it to pump

mafiascrub Mar 29, 2025 04:11 PM

Yo thanks man that really helped me out we drilled the holes and and hopefully ill have it running tommorrow

brian_skotch Dec 7, 2025 11:56 AM

How did this go? Does the cosmo run now? The 76 has a really cool reverse flow intake manifold. The small runners (primaries) actually feed the end plates, while the larger secondary throttles feed the center plate.

I got my cosmo running dumping gas down the carb but I’ve gotta rebuild the hitachi to get it running on its own.

mafiascrub Dec 7, 2025 01:50 PM


Originally Posted by brian_skotch (Post 12644735)
How did this go? Does the cosmo run now? The 76 has a really cool reverse flow intake manifold. The small runners (primaries) actually feed the end plates, while the larger secondary throttles feed the center plate.

I got my cosmo running dumping gas down the carb but I’ve gotta rebuild the hitachi to get it running on its own.

I sold it about 2 or 3 month ago. My parents were really pressuring me to sell it or they would take it to the junk yard. Had a awful time selling the car. but i did get it running for a little bit before it would stall. i took the carb off my rx 7 and threw it on there. in the end that wasn't the issue the gas tank was completely screwed sitting with 5 year old gas in it. i over payed for it and sold it at a lost still kinda pissed about it. glad yours is doing good those rebuild kits are weird. The parts were not the same one my carb.


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