how do you identify a marine carb over automotive
have a holey 850 cfm,from numbers found on it i believe model#4781-5 .........1226 also stamped on.
thank's JP.

Holley publishes that information on their website. Very simply though, a marine carb is going to have "j" style vent tubes.

The easiest way to tell a marine holley versus an automotive holley is that the marine version vent tubes are j-shaped so that if a float sticks the excess fuel is dumped back into the carb and the automotive version are angle cut straight tubes.

Nick

A 4781 carburetor is an automotive carburetor.

Hi Doug!

Didn't realize you were on the board. I talked to you today about speccing a carb, thanks for the help!!

It's ordered.. Expect it in Monday

wath's the cost to get it marine or is it cheeper to replace it ?

Scott,

If you have any tuning questions once you get it, let me know.