Big bore OMC Carbs

[dean jones]

what size are they. I found a set that are1"3/8. Is this them. thanks for help.

[Instigator]

those are medium bore's
the big are 1.640" or about 1 5/8" at the smallest opening in the throat
they will have part #398579 stamped on the small metal plate screwed to the side of them

[dean jones]

THANKS FOR THE HELP.

[MODIFIEDOUTBOARD]

The 2bbls were made in several different sizes.
The throat(Dia were butterflies are) 1.625" were the largest.
These came with a couple different venturi sizes(Dia in the middle of the carb) 1.375" or 1-3/8" are the largest Ive seen.
I can bore or sleeve the 2bbls depending on your application.

[powerabout]

The 2bbls were made in several different sizes.
The throat(Dia were butterflies are) 1.625" were the largest.
These came with a couple different venturi sizes(Dia in the middle of the carb) 1.375" or 1-3/8" are the largest Ive seen.
I can bore or sleeve the 2bbls depending on your application.
did you still have the bell mouths?

[keefallan]

He hasn't been active since 2014 on here.

[keefallan]

I am looking for the same thing you are.

[powerabout]

I am looking for the same thing you are.
you might find him on Ron Hills site boat racing facts