Description
Comparison points and tradeoffs
When comparing Sierra 18-2142 Marine Power Trim Cylinder for Mercruiser Stern Drive with other Power Cylinders options, use this source-backed detail as the primary discriminator: Visit imaginebroward.org’s SONAR parts finder at fit-guide.seastarsolutions.com to ensure this product will fit your application.
Use this second fact to evaluate the tradeoff: Application note: org’s SONAR parts finder at fit-guide. A third point to compare across alternatives is: Category: Replacement Parts / Steering System / Power Steering / Power Cylinders.
Alternative-selection boundary
Choose an alternative when its stated identifiers, application, package, or specifications better match the requirement; no unverified competitor claim is introduced here.
Complete source-backed product details
The Sierra 18-2142 Power Trim Cylinder is interchangeable with the following: GLM 21980, Mercruiser 45706A14, 45706A1, 45706A3, 45706A6, 45706A8, 45706A12. Each Sierra product meets or exceeds the original equipment part it replaces.
Source product highlights
- Fits : All Stern Drive models with internal lines
- Visit imaginebroward.org’s SONAR parts finder at fit-guide.seastarsolutions.com to ensure this product will fit your application.
- All Sierra parts qualify for and are covered under Sierra’s industry leading customer satisfaction warranty




David Taylor –
I put these on my 230 Hp. Mercruser 24 ft. boat. They worked for about a year. Then the out drive started drifting down faster and fast as time went on. When I sold the boat last year the drive would come down within about an hour. For $500.00 a par. I would look for some another brand. .