There's another bigger carb that throttle and choke will hook right up
Walbro RWJ4
And the hd12 vs hd6 is an EPA thing I believe, that will determine which carb the saw has. No huge differences between them.
The zamas were the 365 carbs when they didn't come with walbros. 372 always had the walbro if memory serves.
FWIW here's mine with the tillotson. Same setup as needed for the walbro RWJ carburetor.
I think but I'm not 100% sure that you can run the high top 390 air filter with the 390 air filter elbow underneath the 372 hightop cover, but definitely not the low top filter under the 365 cover. I had no interest in the tall setup so I did not even try it. A bright orange brand new cover looked horrid on my old darkened saw lol
FWIW here's mine with the tillotson. Same setup as needed for the walbro RWJ carburetor.
I think but I'm not 100% sure that you can run the high top 390 air filter with the 390 air filter elbow underneath the 372 hightop cover, but definitely not the low top filter under the 365 cover. I had no interest in the tall setup so I did not even try it. A bright orange brand new cover looked horrid on my old darkened saw lol
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