Marine Carbs

Just re-tune it, like any carb. The J's are for, if the floats hang open, it bogs the engine, to make you open the cowl, and look for the problem. Gas in a bilge is a no-no. And you can get marine quadrajets with no J's.

They take the dissy, glue a screen in the vent; same on starter and alternater. costs $2, then charge double the price of automotive.

It is for safety, as explosions can happen, but too much $. Just re-tune it.

BTW, I have seen auto carbs on marine; they ran the same as marine did.