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OMC Cobra trim sender switch

OEM trim switch

  • Trim sender unit for OMC Cobra
  • Not compatible with the King Cobra model
  • Manufactured by Sierra Marine
  • Compatible with 1986 to 1992 models
  • OEM #984748, Sierra #018-76340
  • Please see our transom drawing for transom assembly parts
  • Exploded View OMC drawings Part number or description search here

OMC trim sender


This trim sender unit for the Cobra, is compatible with 1986 - 1993 standard 3.0 - 5.7 models. Not compatible with the King Cobra, or the newer style 'cone clutch' volvo SX Cobra model.

A common issue with the system not trimming up and down can be due to a defective trim sending unit.

After you have diagnosed the issue is not related to the cylinders, or the motor, and have determined it is in fact the sending unit, this Sierra aftermarket replacement is easy to install.

Many times, on the defective sending unit you are replacing, you'll find the spring that controls the arm has broken internally leading to the need to replace the assembly.

Used trim cylinders and assemblies are available (call for availability of used stock). If you are having issues with your trim / lifting system of your outdrive, issues can be caused by a defective switch, leaking/faulty cylinders or damaged hoses.

Contact our tech department for more information regarding these issues.

 Customers who bought used OMC parts also purchased:

87656 OMC Cobra lower unit gasket seal kit V6-V8
87656 OMC Cobra lower unit gasket seal kit V6-V8

P/N 87656 Lower unit seal kit compatible with 3.0 liter years 1990, 1991, 1992 and 1993. V6 and V8 all years 1986 to 1993, except King Cobra SX cone clutch. OEM 439967 $67.89


P/N 87654 Cobra upper gear case years seal kit OEM 987603 $53.89