CDI Electronics 118-99510 ESA Interrupter Switch and Harness, Replaces 933-4051 984051, OMC Cobra Sterndrive

The CDI Electronics 118-99510 is an Electronic Shift Assist (ESA) switch and harness assembly built for OMC Cobra sterndrive engines. It functions as the electronic interrupter switch in the shift circuit, working with the ESA system to momentarily interrupt ignition during shifting so the engine can be shifted smoothly between gears without clashing. The assembly comes as a complete switch and wiring harness unit, designed to be a direct install for the OMC Cobra ESA shift system it was engineered for.

As a CDI Electronics part, it is built to the same form, fit, and function as the original OMC shift interrupter switch it replaces, so the ESA system operates as designed once the new switch and harness are installed. Because this is an electrical switching component operating in the boat's shift and ignition circuitry, correct installation and secure harness connections are important to proper ESA function.

Specifications

• Brand: CDI Electronics
• Manufacturer Part Number: 118-99510
• Product Type: Electronic Shift Assist (ESA) Interrupter Switch and Harness
• Application: OMC Cobra Sterndrive Engines
• Contact Type: Normally Open
• Connector Type: Molex
• Switch Type: Push Button
• Mounting Type: Surface Mount
• Material: Stainless Steel
• Item Dimensions: 7 x 4 x 2 inches
• Weight: 0.2 pounds

Fitment

• OMC Cobra Sterndrive Engines

Replaces (OEM)

• 984051
• 933-4051

Frequently Asked Questions

What is the CDI Electronics 118-99510 used for? It is an Electronic Shift Assist (ESA) interrupter switch and harness assembly for OMC Cobra sterndrive engines, used within the ESA system to momentarily interrupt ignition so the engine shifts gears smoothly.

Does the 118-99510 include the wiring harness? Yes, the CDI Electronics 118-99510 is a complete switch and harness assembly, not just the switch by itself.

What OEM part numbers does this switch replace? The 118-99510 replaces OMC part numbers 984051 and 933-4051.

Will this switch fit any sterndrive engine? The 118-99510 ESA interrupter switch and harness is built for OMC Cobra sterndrive engines specifically, not sterndrives in general.

Is the 118-99510 a genuine CDI Electronics part or aftermarket? It is a CDI Electronics branded part, engineered to match the fit and function of the original OMC ESA interrupter switch it replaces.

What type of contact does the switch use? The 118-99510 uses a normally open contact design with a push button switch mechanism.

What connector does the harness use? The harness on the 118-99510 terminates in a Molex-style connector for installation into the ESA wiring circuit.

How much does the 118-99510 weigh? The CDI Electronics 118-99510 switch and harness assembly weighs 0.2 pounds.

What are the dimensions of the switch and harness? The 118-99510 measures approximately 7 x 4 x 2 inches.

What material is the switch made from? The switch component of the 118-99510 assembly is made from stainless steel.

How is the 118-99510 mounted? It uses a surface mount design for installation in the ESA shift circuit housing.

Why would I need to replace this switch? If the OMC Cobra sterndrive's ESA system is not interrupting ignition correctly during shifts, the interrupter switch (CDI 118-99510) is a common point of failure and replacement.