Power valve size??

[foilled]

Omc 5.7 holley 4160 600 carb. Hello , rebuilt carb and im wondering what power valve size to use, i believe the kit came with a 7.5 and 2.5. Online im reading for holley carbs use half the vacuum reading for the power valve. Yet faded it appears the old power valve was a 2.5. With my vaccum being around 15hg im not sure what to do. Any ideas, thanks?

 

[Lou C]

You can call or email Holley tech service they should be able to tell you....

 

[jimmbo]

Whats the carb number? A lot of Holley's marine carbs use the 2.5 power valve. Don't try to calibrate a boat carb the way you do a car/truck carb. The engine is operating under a different set of parameters

Here is a link with a lot of Holley specs
http://documents.holley.com/techlibrary_carb_numerical_listing.pdf

 

[Scott Danforth]

A 25 or 35 power valve is common.