New Red Rhino / Mercury & Mariner 2004-2014 75/90/115 HP Optimax Gearcase Rebuild Kit

Featuring all the parts needed to effectively rebuild an outboard gearcase in one convenient package, our lower unit rebuild packages offer a combination of aftermarket kits, bearings, gears, and seals, all complete with a one-year limited warranty. In addition to the parts detailed below, please email or fill out the form below if you need any other parts to get your motor running again.

This rebuild kit, designed for Mercury/Mariner 75/90/115 HP 3 Cylinder Optimax models from 2004-2014 and 4 Cylinder 4-Stroke models from 1999-2006.

Before ordering, please select the appropriate model from the two options above and check for any price adjustments.

It includes the following items:

Gear Set (Kit will be one of the two below depending on year and model of motor)

• 75-90 HP (1998-2006) [Replaces OEM#s 43-850034T & 43-859472A3]
  
• 115 HP [Replaces OEM#s 43-881260A5, 43-850036T]
  

Clutch Dog [Replaces OEM# 52-850048T]

Clutch Dog Spring [Replaces OEM# 24-30893]

Clutch Dog Pin [Replaces OEM# 17-30632]

Pinion Nut [Replaces OEM# 11-35921]

Water Pump Kit [Replaces OEM# 47-43026T11]

Seal Kit [Replaces OEM# 26-43035A4]

Shim Kit [Replaces OEM#s 44491A1 & 44492A1]

Bearing Kit [OEM Replacement #s in Parentheses] [Includes Inner Forward Bearing (31-30895T), Outer Forward Bearing (31-30894A1), Bottom Drive Shaft Bearing (31-42677A1), Reverse Thrust Bearing (31-12576T), Aft Carrier Bearing (31-30956T), Forward Carrier Bearing (31-12578A), and Top Drive Shaft Bearing]

Additionally, we offer other items for these lower units for separate order. Please email or fill out the form below for pricing and availability.

SHIPPING: Additional shipping fees to Alaska, Hawaii, US Territories, or International Shipping will be calculated after checkout. You will receive an email and a PayPal money request for the additional shipping charges at the email address provided. (Some items are excluded from international shipping)

If you have any questions, please contact us through e-mail at customerservice@marinepartswarehouse.com. Please provide your engine model number to help confirm compatibility.