Mikuni SBN Carburetor Diaphragm Cover Plate carburetor or 1630 ACE engine into

or 1630 ACE engine into a custom watercraft

which are much easier to work with compared to the 13mm ones when removing your carbs

To mitigate water ingestion

The reverse cone on the screw will create a small seat in the casting

More ReliableNo loose wires

Mikuni SBN Carburetor Diaphragm Cover Plate carburetor or 1630 ACE engine intoIntroducing our Mikuni SBN carburetor diaphragm cover plates, now available in black and blue. Machined from 6061 aluminum, these plates provide excellent corrosion resistance. Key features include: A vertical hole at the bottom to prevent diaphragm blockage from exhaust interference, especially useful when using a reed spacer. A relocated breather hole that ensures any water entering the cover plate will drain out, even if your ski gets submerged.