Sierra Gearcase Filler 18-99524, Replaces 551-33GF and S33

The Sierra Gearcase Filler (18-99524) is a lubricant-filling accessory designed to make gearcase oil changes cleaner and easier. Its sturdy tear-drop shaped body is built to resist tipping over during use, reducing the risk of spilled gear lubricant while filling or servicing a lower unit. A built-in vent lets the filler valve be removed from the gearcase fitting without losing the lubricant inside the filler, so the remaining oil stays contained instead of draining out when the valve is disconnected.

The filler measures 22 x 9.5 x 10 inches and weighs 6.1 pounds, giving it enough capacity and stability for shop use. It is identified by UPC 808282394776 and falls within the marine oil change pump category, used by technicians and boat owners performing routine gearcase lubricant service.

Specifications

• Brand: Sierra
• Manufacturer Part Number: 18-99524
• Product Type: Gearcase Filler
• Design: Tear-drop shape resists tip-over
• Feature: Vent allows filler valve removal without losing lubricant
• Weight: 6.1 pounds
• Dimensions: 22 x 9.5 x 10 inches
• UPC: 808282394776

Replaces (OEM)

• 551-33GF
• S33

Frequently Asked Questions

What is the Sierra 18-99524 used for? It is a gearcase filler used to add lubricant to a marine lower unit or gearcase during an oil change, with a tear-drop shaped body designed to resist tipping over while in use.

How does the vent on this gearcase filler work? A built-in vent lets you remove the filler valve from the gearcase fitting without losing the lubricant remaining inside the filler, keeping the oil contained instead of spilling out when the valve is disconnected.

What are the dimensions of the Sierra 18-99524 gearcase filler? The unit measures 22 x 9.5 x 10 inches.

How much does the Sierra 18-99524 weigh? It weighs 6.1 pounds.

Does the Sierra 18-99524 cross-reference to any other part numbers? Yes, the Sierra 18-99524 gearcase filler replaces part numbers 551-33GF and S33.

Is 551-33GF the same product as the Sierra 18-99524? 551-33GF is a part number that the Sierra 18-99524 gearcase filler directly replaces, so it serves the same function.

What UPC is associated with the Sierra 18-99524 gearcase filler? The UPC for this gearcase filler is 808282394776.

Why does the tear-drop shape matter on a gearcase filler? The tear-drop shaped body of the Sierra 18-99524 gives it a stable base that resists tipping over during filling, helping prevent spilled gear lubricant.

What category does the Sierra 18-99524 belong to? It is classified as a marine oil change pump accessory, specifically a gearcase filler.

Can the Sierra 18-99524 be used to replace lubricant without losing what's already in the filler? Yes, because of its vented design, removing the filler valve from the gearcase does not cause the lubricant inside the 18-99524 filler to drain out.