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Bravo Lower Units:

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IMCO Shortened Lower Units For Mercury Bravo Drive
These all new shortened lower units come with Mercury XR parts installed by using the IMCO lower housing and installing XR factory parts, you get the best of both worlds. Units are fully assembled and ready to install. Prop hub kit is included. 
NOTE: These parts & unit have no warranty.
Part No. Description
525-13750 Satin Complete 1"
525-13751 Polished Complete 1"
525-13752 Black Complete 1"
525-13753 Satin Complete 2"
525-13754 Polished Complete 2"
525-13755 Black Complete 2"
421-13756 Satin 1" Case Only
421-13757 Satin 2" Case Only
421-POL Polish Option
421-Black Black Powder Coat Option
New Mercury XR Upper With IMCO Shortened Lower Complete
This is an all new XR upper drive with an IMCO shorter lower. The IMCO lower has all Merc XR parts installed this drive is complete 1.50 ratio. Optional gear ratio is available as an upgrade. This is a performance drive and has no warranty on parts or labor.
Part No. Description
525-13800 XR with Satin 1" Lower Complete
525-13801 XR with Polished Complete 1" Lower Complete
525-13802 XR with Black Complete 1" Lower Complete
525-13803 XR with Satin Complete 2" Lower Complete
525-13804 XR with Polished Complete 2" Lower Complete
525-13805 XR Lower with Black Complete 2" Lower Complete
421-13806 XR Lower Gears Option 1:35
421-13807 XR Lower Gears Option 1:26
New XR Drive & HP Gimbal Package
This is a great complete package for repower or to build that custom boat project. Comes with a new Mercury XR Drive and IMCO lower unit, HP Merc gimbal housing assembly, bellhousing assembly HP coupler, Hydraulic trim pump with HD Bracket, Shift bracket, and oil drive rev bottle.
Part No. Description
525-13900 XR Drive Package System
Bravo Sterndrive Spacer Kits

Spacer blocks are installed between the upper driveshaft housing and the lower gear case to get the ideal prop height for your boat. Includes all hardware. Note: Spacer kits are non returnable.

Part No. Description
421-1415 1/2" Spacer Kit
421-1411 1" Spacer Kit
421-14115 1-1/2" Spacer Kit
421-1412 2" Spacer Kit