Sierra Pinion Nut 18-3769, Replaces OMC 911753, Fits OMC Outboard Gearcases

The Sierra 18-3769 is a pinion nut engineered as a direct replacement for the OMC gearcase and drive system. It secures onto the drive shaft to retain the pinion gear assembly in the lower unit, and is built to match the fit and function of the original OMC hardware it replaces. This part is sourced within Sierra's OMC gearcase and drive parts line and is intended for boat owners and marine technicians servicing lower-unit gearcases on the applicable OMC outboard models.

As a gearcase hardware component, the 18-3769 pinion nut is a precision-fit replacement item, not a universal fastener, and is matched specifically to OMC engine models and years where the original 911753 nut was used. Installers should confirm their engine model against the fitment list below before ordering to ensure correct gear mesh and drive shaft retention.

Specifications

• Brand: Sierra
• Manufacturer Part Number: 18-3769
• Product Type: Pinion Nut
• Replaces (OEM): 911753
• Category: OMC Gearcase and Drive Parts
• Weight: 0.25 pounds
• UPC: 808282159603
• Fitment: OMC 115 (1994-97), 232 (1987-90), 252 (1986), 262, 350, 460 (1989), 302, 574 (1986-92), 432 (1986-93), 502 (1988-93), 504, 754 (1986-88), 584 (1989-93), 744 (1988), 90 Jet (1994-95)

Fitment

• OMC 115 (1994-97)
• OMC 232 (1987-90)
• OMC 252 (1986)
• OMC 262
• OMC 350
• OMC 460 (1989)
• OMC 302
• OMC 574 (1986-92)
• OMC 432 (1986-93)
• OMC 502 (1988-93)
• OMC 504
• OMC 754 (1986-88)
• OMC 584 (1989-93)
• OMC 744 (1988)
• OMC 90 Jet (1994-95)

Replaces (OEM)

• 911753

Frequently Asked Questions

What does the Sierra 18-3769 pinion nut replace? The Sierra 18-3769 pinion nut is a direct replacement for OMC part number 911753.

Which OMC engine models does the 18-3769 pinion nut fit? It fits OMC engine models 115 (1994-97), 232 (1987-90), 252 (1986), 262, 350, 460 (1989), 302, 574 (1986-92), 432 (1986-93), 502 (1988-93), 504, 754 (1986-88), 584 (1989-93), 744 (1988), and 90 Jet (1994-95).

What is the Sierra part number for this pinion nut? 18-3769 is the Sierra part number for this pinion nut.

How much does the Sierra 18-3769 pinion nut weigh? The Sierra 18-3769 pinion nut weighs 0.25 pounds.

What type of part is the Sierra 18-3769? It is a pinion nut, classified within OMC gearcase and drive parts, used in the lower unit gearcase assembly.

Is the Sierra 18-3769 an OEM part or an aftermarket replacement? The Sierra 18-3769 is an aftermarket pinion nut manufactured by Sierra to replace the original OMC 911753 nut.

Will the Sierra 18-3769 fit any OMC outboard? No, the 18-3769 pinion nut is matched to specific OMC engine models only, including 115, 232, 252, 262, 350, 460, 302, 574, 432, 502, 504, 754, 584, 744, and 90 Jet; confirm your engine model before ordering.

What UPC is associated with the Sierra 18-3769 pinion nut? The Sierra 18-3769 pinion nut carries UPC 808282159603.

What does a pinion nut like the Sierra 18-3769 do in a gearcase? A pinion nut retains the pinion gear on the drive shaft within the gearcase, and the 18-3769 is sized to perform this role on the applicable OMC models listed in its fitment.

Can the Sierra 18-3769 be cross-referenced by its OMC number? Yes, buyers searching by the OMC number 911753 will find that it corresponds to the Sierra 18-3769 pinion nut.