Sierra U-Joint - SIE-18-2104

Sierra 18-2104 Heavy Duty U-Joint

Sierra aftermarket engine parts are manufactured to meet or exceed OEM requirements.

Features:

Includes both straight and 90° grease fitting

Heavy Duty

Fits:

All #1 & Alpha I units (s/n 1684188 - B418818), also TR/TRS & II SSM

All OMC Cobra Drives (1986-89)

Interchangeable with:

GLM

28020

Mallory

9-72404

MerCruiser Stern Drive

36312

41431

58749

75832

758321

75832A1

75832A2

75832A3

75832T

75832T1

OMC Stern Drive

912214

915716

Volvo Penta

853255

897707

Frequently Asked Questions

• What is the Sierra 18-2104 Heavy Duty U-Joint used for? The Sierra 18-2104 Heavy Duty U-Joint is a replacement U-joint for specified marine sterndrive applications. It fits all #1 and Alpha I units with serial numbers 1684188 through B418818, as well as TR/TRS and II SSM applications and OMC Cobra Drives from 1986 through 1989.
• Which sterndrives does the Sierra 18-2104 Heavy Duty U-Joint fit? The Sierra 18-2104 fits all #1 and Alpha I units within the listed serial number range, along with TR/TRS and II SSM applications. It also fits all OMC Cobra Drives from 1986 through 1989. Verify your drive type and serial number before purchasing.
• What grease fittings are included with the Sierra 18-2104 U-Joint? The Sierra 18-2104 Heavy Duty U-Joint includes both a straight grease fitting and a 90-degree grease fitting. The product is identified as a heavy-duty U-joint for the specified marine sterndrive applications.
• What part numbers are interchangeable with the Sierra 18-2104 Heavy Duty U-Joint? The Sierra 18-2104 is listed as interchangeable with GLM 28020, Mallory 9-72404, MerCruiser Stern Drive 36312, 41431, 58749, 75832, 758321, 75832A1, 75832A2, 75832A3, 75832T, and 75832T1, OMC Stern Drive 912214 and 915716, and Volvo Penta 853255 and 897707.
• Does the Sierra 18-2104 Heavy Duty U-Joint meet OEM requirements? Sierra states that its aftermarket engine parts are manufactured to meet or exceed OEM requirements. The 18-2104 is identified as a heavy-duty U-joint for the listed #1, Alpha I, TR/TRS, II SSM, and OMC Cobra Drive applications.