Towing Equipment› Hitches

SIERRAMARINE

THREADED NOZZLE

$31.66

SKU: S08C 18-99543

Special Order
Special Order
Ships in 4–6 weeks
Free Shipping
Non-Returnable Item
INSTALL DIFFICULTY
DIY PRO SHOP

Beginner — under 30 min

Description

The Sierra 18-99543 is a replacement threaded nozzle adapter designed for use with marine engine diagnostic pressure and vacuum testing equipment. This precision-threaded component serves as a connection point between testing instruments and engine test ports, allowing technicians to perform accurate pressure diagnostics on marine engines.

It is an essential replacement component for maintaining the accuracy of test equipment.

Fitment

Fitment Guaranteed

Don’t gamble
on fit.

Log your build in the MOTORMIA app and we’ll guarantee this part fits your exact setup — or your money back, return shipping covered.

Available on iOS & Android

Specifications

BrandSIERRAMARINE
Part NumberS08C 18-99543

Buy with Confidence

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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