Quick take
The four listed parts cover three different jobs. If the goal is a complete control unit for a Mercury outboard, the Top-Mounted Marine Throttle Control Box is the only assembly in the group. If the goal is a repair, the Mercury cover, the 6 ft cable, and the Morse knob are all replacement pieces. The listed prices run from a small lever knob to a full control box.
Before you pick, think about whether the rest of the throttle system is in good shape. A knob or cable can fix a small failure, while a full control box replaces the main unit entirely. That decision is more useful than comparing part numbers alone.
Listed price comparison
| Product | Listed Price | Price Bar |
|---|---|---|
| Top-Mounted Marine Throttle Control Box | USD 353.99 | |
| Mercury Marine Throttle Control Housing Cover 14389 | USD 33.33 | |
| 6 FT 33C Marine Throttle Control Cable | USD 21.89 | |
| Morse Marine Twin S Red Throttle Lever Knob | USD 11.00 |
Decision matrix
- Choose the Top-Mounted Marine Throttle Control Box when you want a complete control unit and your motor is a 2-stroke gasoline Mercury outboard.
- Choose the Mercury Marine Throttle Control Housing Cover 14389 when you need a cover for an existing Mercury throttle housing and are comfortable with a used part.
- Choose the 6 FT 33C Marine Throttle Control Cable when you need the push-pull cable link for an inboard, outboard, or outdrive unit and can work with a 6 ft length.
- Choose the Morse Marine Twin S Red Throttle Lever Knob when you need just the knob and want brass internal threads instead of plastic threads.
Product notes
Mercury Marine Throttle Control Housing Cover 14389
This is a used Mercury cover with the part number 14389, priced at USD 33.33. If you already have a Mercury throttle control housing and the outer cover is cracked or missing, this replacement cover is the most direct fit candidate among the four. The Mercury brand name and explicit part number make it easy to match to a specific housing.
That said, the condition is listed as Used, so you are buying a pre-existing part. The part is the cover only; the rest of the assembly is not included. If your repair requires a new cover rather than a used one, this option will not satisfy that requirement.
Top-Mounted Marine Throttle Control Box - Durable for Mercury Outboard Motors
At USD 353.99, this is the highest-priced part in the group, but it is also the only complete control box listed. The title says it is top-mounted and built for Mercury outboard motors, and it is listed for a 2-stroke gasoline engine type. The construction is described as durable aluminum ADC2+ASA with an ABS shell handle, and the total listed weight is 7 pounds.
The limitation is the cost and the compatibility field: the listed engine type is 2 Stroke. If your outboard is a 4-stroke or a different brand, this control box may not be the right match. It is also the largest item here, so it suits a full replacement job more than a quick knob or cable swap.
6 FT 33C Marine Throttle Control Cable for Boat Engine Inboard Control Lever
Priced at USD 21.89, this cable sits between the knob and the control box. The title identifies it as a 6 ft 33C marine throttle control cable, and it is listed as suitable for single and dual stations, with a 100mm minimum bend radius and compatibility with most outboard, outdrive, and inboard units. The stainless steel end fitting and splined core point to a high-quality cable.
The main limitation is the fixed 6-foot length: you need to route it between the lever and the engine within that span. It is also specifically a cable, not a throttle control box or lever. A 1-year warranty is listed.
Morse Marine Twin S Seastar Teleflex Dometic RED Throttle Control Lever Knob
The least expensive part here is USD 11.00. This red knob is listed as a replacement Morse Marine Twin S control knob, covering Seastar, Teleflex, and Dometic style controllers. The brass internal threads are the main draw: a 3/8-24 brass threaded insert that is designed to hold up better than a plastic-threaded knob. It is 1 3/8 inches in diameter with a 0.718-inch thread depth.
The limitation is that it is just the knob. The controller is not included, so you cannot use it as a stand-alone throttle control. The condition is also listed as New other (see details), which means it is new but not in a pristine retail package.
Final recommendation by use case
- Full control unit replacement: Top-Mounted Marine Throttle Control Box.
- Cover for an existing Mercury housing: Mercury Marine Throttle Control Housing Cover 14389.
- Cable replacement between lever and engine: 6 FT 33C Marine Throttle Control Cable.
- Single lever knob replacement: Morse Marine Twin S Red Throttle Lever Knob.
If you want to spend the least and only need a knob, the Morse knob is the low-price pick. If you need a complete control assembly, the top-mounted box carries the highest listed price in this group.
