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Used Outboard Parts & Fresh Water Sterndrive Parts

821306T30 Mercury Mariner Outboard 25HP 4 Stroke 15" Lower Unit Gear Case
821306T30 Mercury Mariner Outboard 25HP 4 Stroke 15" Lower Unit Gear Case821306T30 Mercury Mariner Outboard 25HP 4 Stroke 15" Lower Unit Gear Case821306T30 Mercury Mariner Outboard 25HP 4 Stroke 15" Lower Unit Gear Case821306T30 Mercury Mariner Outboard 25HP 4 Stroke 15" Lower Unit Gear Case821306T30 Mercury Mariner Outboard 25HP 4 Stroke 15" Lower Unit Gear Case821306T30 Mercury Mariner Outboard 25HP 4 Stroke 15" Lower Unit Gear Case821306T30 Mercury Mariner Outboard 25HP 4 Stroke 15" Lower Unit Gear Case821306T30 Mercury Mariner Outboard 25HP 4 Stroke 15" Lower Unit Gear Case821306T30 Mercury Mariner Outboard 25HP 4 Stroke 15" Lower Unit Gear Case821306T30 Mercury Mariner Outboard 25HP 4 Stroke 15" Lower Unit Gear Case
$975.00
This sale is for one used Mercury and Mariner 25HP Outboard lower unit gear case.

Mercury Part Number 1682-821306T30, 821306T30
Short shaft for 15" transom
The driveshaft measures 18 3/8" from the tip to the base of the water pump and has 14 splines.
Ratio 2.41:1
The pinion gear has 12 teeth. 
The forward and reverse gears both have 29 teeth. 
Prop Shaft splines 13

This gear case has been fully disassembled and inspected.  The gears and bearings are in Great condition. 
This is a fresh water part.

It has been pressure tested and held at 17 psi. 

This lower unit does NOT come with a water pump.

Fit some Mercury and Mariner 25HP 4 stroke carb short shaft outboards. (Not Seapro models)

You will receive this exact Mercury Outboard lower unit gear case that you see pictured.


Please check your part numbers to ensure a proper fit for your application.

Thank you for shopping at our store!

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