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28pci, 24.5mm venturi jetting
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jz56oval
Samba Member


Joined: September 03, 2007
Posts: 353
Location: bay area
jz56oval is offline 

PostPosted: Wed Mar 08, 2017 10:48 pm    Post subject: 28pci, 24.5mm venturi jetting Reply with quote

Hey all

I have a stock 36hp with 28pci. Thought I'd add a bit more pep to it by adding a 24.5mm venturi and a 145 main jet with 180 air correction. So far after a tank of fuel has gone. It came out to be 11.4 MPG. I was at around 25mpg before with stock set up. I tried a 140 main jet with 180 air and there was a lack of power at higher cruising speeds or higher rpms at some points.

The 145 main and 180 air still hde a bit of power loss but most of the time it runs great but it bothers me that the mpg has gone way down.

Would adding a larger air correction jet help this issue or keeping the 180 air and adding a 135 main?i I'm in the bay area, CA. at about 300 - 400 feet above sea level.

Any help would be appreciated.
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