parrisw
Tree Freak
Got the squish machined today, ground out the lower transfers and machined the base. Now to bolt it on the saw and check numbers.
375xp-51.4mm
- Thread starter parrisw
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komatsuvarna
Arboristsite MVP
Yes the venturi is basically the same. Even the HD12 that comes on the 372 has a big venturi compared to the other saws in it's class, even bigger than 7900 as well.
Nice work as always Will!!
wigglesworth
Booned
An HS 296 can be opened up to just shy of 19mm and still keep a good relationship of throttle bore to Venturi size. Expect to do some drilling if you go that far though. It's a swap that's well worth it....
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parrisw
Tree Freak
Thanks for the welcome back guys, good to be back at it, was actually nice to take a break.
parrisw
Tree Freak
An HS 296 can be opened up to just shy of 19mm and still keep a good relationship of throttle bore to Venturi size. Expect to do some drilling if you go that far though. It's a swap that's well worth it....
Are you opening just the Venturi? I was thinking of opening another 1mm. How much did you have to drill?
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parrisw
Tree Freak
So I need a 390 intake? And XT filter adapter?
duramax99
ArboristSite Operative
372 intake. Just trim the wing where the pulse hose goes through and clock it so the carb sits flat. Xt372 adaptor and choke lever will let you use the stock 372 filter
parrisw
Tree Freak
Ahh, ok, I'll have to go pick up those two parts then. Thanks.
duramax99
ArboristSite Operative
Can use the 390 filter adaptor just cut the choke wing off of it. Youll have to use a 390hd air filter and trim the ribbing on the inside of the 372hd filter cover but it does all fit under there!
duramax99
ArboristSite Operative
View attachment 295283 built this beast over winter now im building a matching BB372 with a 390 carb swap.
parrisw
Tree Freak
Ok, I'll give that a try first, since I have those parts. What about choke pull? Do I still need the XT one?
Sweet.
duramax99
ArboristSite Operative
Ive just been using a 372 choke lever if i remember right. Might have been the 390 lever but either way you dont need the 372xt lever
parrisw
Tree Freak
Thanks. I'm sure when I do it, I'll figure it out, can't be too hard.
duramax99
ArboristSite Operative
Its not too bad at all. Just remember to trim all the ribbing out of the air filter cover or it can be a real pain to get off later! Dont ask how i know that lol
parrisw
Tree Freak
Yep. The bigger filter can't be a bad thing either.
I can send you an XT manifold and choke lever in your next box- I have an extra set.
parrisw
Tree Freak
Well, that would be awesome! Then I don't have to do any trimming of the filter cover.
You should be receiving a nice box soon too!
No worries- I'd like to see you get the most out of this, so's I can get the most out of mine later...
parrisw
Tree Freak
YEA Buddy! Now your talking!
