Sierra Grease Gun 3 Oz, All Steel Construction, Replaces Mercury 91-74057Q6

The Sierra Grease Gun (18-9783) is a 3 oz. Hand-held grease gun built for marine maintenance tasks that call for precise, small-volume lubrication of fittings, steering components, and other grease points on boats and outboard engines. It features heavy duty all steel construction designed for dependable, long service life in the demanding marine environment, resisting the wear that lighter-duty plastic guns cannot handle. Its compact 3 oz. Capacity makes it a practical choice for touch-up greasing jobs, onboard storage, or as a spare alongside a larger-capacity gun, and it is sold in display packaging for retail presentation. This grease gun is compatible with the same fittings as the OEM Mercury grease gun it replaces, so it drops into existing maintenance routines without needing a different tool or technique. Whether you are servicing steering cables, trim tilt fittings, or other grease nipples around the boat, the all-steel body stands up to repeated use and rough marine storage conditions better than lighter alternatives.

Specifications

• Brand: Sierra
• Manufacturer Part Number: 18-9783
• Capacity: 3 oz.
• Construction: Heavy duty all steel
• Packaging: Display packaged
• Weight: 2.06 pounds
• Category: Marine Lubricants
• UPC: 030999969309

Replaces (OEM)

• Mercury 91-74057Q6
• 18-9779

Frequently Asked Questions

What size is the Sierra 18-9783 grease gun? The Sierra 18-9783 grease gun holds 3 oz. Of grease, making it a compact option for touch-up lubrication jobs on a boat.

What is the Sierra 18-9783 grease gun made of? It has heavy duty all steel construction, built for dependable, long service life in marine conditions.

Does the Sierra 18-9783 grease gun replace a Mercury part? Yes, the Sierra 18-9783 replaces Mercury part number 91-74057Q6.

What other part number does the Sierra 18-9783 grease gun cross-reference to? In addition to the Mercury 91-74057Q6, the Sierra 18-9783 grease gun also cross-references to part number 18-9779.

How much does the Sierra 18-9783 grease gun weigh? The Sierra 18-9783 grease gun weighs 2.06 pounds.

Is the Sierra 18-9783 grease gun sold individually or in a package? It is sold display packaged, making it suitable for retail shelf presentation.

What is the difference between the Sierra 18-9783 and 18-9782 grease guns? The 18-9783 holds 3 oz. Of grease, while the related 18-9782 model is the larger 14 oz. Version; both are separate part numbers, so buyers should choose based on capacity needed.

What category does the Sierra 18-9783 grease gun fall under? The Sierra 18-9783 is categorized as a marine lubricant product.

Is the Sierra 18-9783 a genuine aftermarket replacement or an OEM part? The Sierra 18-9783 is an aftermarket grease gun engineered to replace the Mercury 91-74057Q6, built to the same all-steel durability standard.

What is the UPC for the Sierra 18-9783 grease gun? The UPC for the Sierra 18-9783 grease gun is 030999969309.