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If your Mfgr. says:

That motor's 7 years old!!
Part is no longer available.
We lose $$ on service!
EPA made me do it!
Part's at central warehouse, you'll get it next month.
We don't make parts for those.
We only do warranty work.
Our techs only fix late models.
No clue what's wrong! So we'll work time & material.

Baloney!!

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NEW & REBUILT GEARCASES

3 & 4 Cylinder

NEED A GEARCASE  V6  2.0L - 2.5L MERC? FIND IT HERE
NEED A GEARCASE  V6  3.0L MERC? FIND IT HERE
4-Stroke 3 & 4-CYL Geacases are HERE
4-Stroke 6-CYL and VERADO Geacases are HERE

Concerned about your gearcase or water pump? Try our gearcase tips page.

warning symbolNOTE!! You MUST PROVIDE THE SERIAL NUMBER when ordering. I cannot send you the correct parts otherwise!
BE SURE to VERIFY shaft length (measure from top of gearcase to top of driveshaft) in the listings below

Please take the time to enter the serial number of your motor in the shopping cart!

HOW TO TELL THE NUMBER OF REVERSE GEAR JAWS:
EXAMINE TAB AGAINST TRIM FIN SCREW
3 and 4-CYL
Thru 2006
(excluding DFI)

Driveshaft length is measured from the gearcase top to the top of the driveshaft. This length will be 2" shorter than the one you order,
e.g. your driveshaft measures 23" so the lower unit you need is listed as 25".

NEW and Rebuilt units carry a 1 (one) year warranty. This is a supplier warranty.
Some units have core value (included in price, if so). Return shipping for those cores is prepaid, if you have a repairable unit.
MasterTech will remit the core credit after evaluation by the rebuilder.


ALL SHIPPING CHARGES ARE INCLUDED (Continental US Only)
PLEASE NOTE: OVERSEAS SHIPMENTS (INCLUDING HAWAII, ALASKA, & U.S. TERRITORIES) REQUIRE EXTRA SHIPPING CHARGES.
CORE CHARGES FOR THESE GEARCASES ARE NOT REFUNDABLE AND NO CORE IS REQUIRED. THE PRICE REMAINS THE SAME.

Rebuilt and New gearcases are subject to availability.
New 4-Stroke Units May Be From Jet Conversions

Unfortunately, we have no source for any 2-cylinder rebuilt gearcases.

MERCURY/U. S. MARINER GEARCASES
CYL DESCRIPTION CORE STOCK
NUMBER
PURCHASE
3 Mercury/Mariner Rebuilt Lower
60 HP Bigfoot 1995-1997
None Required ME-G3-04-R $1,786
3 Mercury/Mariner Rebuilt Lower
60 HP Bigfoot 1998-2006
None Required ME-G3-05-R $1,786
3 Mercury/Mariner Rebuilt Lower
70-90 HP 1987-1997 3-Jaw
You may upgrade to NEW 6-jaw style;
see 1998-2006 unit below
None Required ME-G3-06-R $1,666
CYL DESCRIPTION CORE STOCK
NUMBER
PURCHASE
3 Mercury/Mariner Rebuilt Lower 6-Jaw
70-90 HP 1998-2006
May be used on earlier 3-jaw units by installing an
updated shift rod (available from MasterTech thru Mercury)
None Required ME-G3-07-R $1,666
3 Mercury/Mariner New Lower 6-Jaw
70-90 HP 1998-2006
May be used on earlier 3-jaw units by installing an
updated shift rod (available from MasterTech thru Mercury)
None Required ME-G3-07-N $1,906
3 Mercury New Lower
75-90 HP OPTIMAX 2004-2014
None Required ME-G3-09-N $1,906
3 Mercury New Lower
115 HP OPTIMAX 2004-2014 20"
None Required ME-G3-13-N $1,906
3 Mercury Rebuilt Lower
115 HP OPTIMAX 2004-2014 20"
None Required ME-G3-13-R $1,666
3 Mercury New Lower
115 HP OPTIMAX 2004-2014 25"
None Required ME-G3-14-N $1,906
CYL DESCRIPTION CORE STOCK
NUMBER
PURCHASE
4 Mercury/Mariner Rebuilt Lower
110-115-125 HP 1988-1997 20"
Original 3-Jaw gearcase
1988-97 6-Jaw below may be substituted; requires
new shift rod (available from Mercury through Mastertech
None Required ME-G4-02-R $1,666
4 Mercury/Mariner Rebuilt Lower
110-115-125 HP 1988-1997 25"
Original 3-Jaw gearcase
1988-97 6-Jaw below may be substituted; requires
new shift rod (available from Mercury through Mastertech
None Required ME-G4-03-R $1,666
4 Mercury/Mariner New Lower
110-115-125 HP 1988-1997 25"
Original 3-Jaw gearcase
1988-97 6-Jaw below may be substituted; requires
new shift rod (available from Mercury through Mastertech
None Required ME-G4-03-N $1,906
4 Mercury/Mariner Rebuilt Lower
110-115-125 HP 1998-2006 20" 6-Jaw
None Required ME-G4-04-R $1,666
4 Mercury/Mariner New Lower
110-115-125 HP 1998-2006 20" 6-Jaw
None Required ME-G4-04-N $1,906
4 Mercury/Mariner Rebuilt Lower
110-115-125 HP 1998-2006 25" 6-Jaw
None Required ME-G4-05-R $1,666
4 Mercury/Mariner New Lower
110-115-125 HP 1998-2006 25" 6-Jaw
None Required ME-G4-05-N $1,906
DON'T SEE WHAT YOU NEED? JUST ASK.
QUICK QUOTE FORM
QUICK SECURE ORDER FORM

We pay the freight out in USA on all orders over $100.00. Orders less than this amount will have a shipping and handling charge of $8.75 added. Some bulky and heavy items will incur additional charges. You will be notified beforehand if this is the case. Remember, all orders receive free technical support from the MasterTech!

 
 

Please review our Warranty, Returns & Refunds policies before you place an order.

DISCLAIMER

The information provided on these pages is correct to the best of my knowledge, however the MasterTech makes no warranty, express or implied, regarding the use of, results of, or liability created from, application of this data. This information is disseminated in good faith, however MasterTech assumes NO LIABILITY whatsoever in regard to this service. The information, software, products, and services published on this web site may include inaccuracies or typographical errors. Changes are periodically added to the information herein. Mastertech may make improvements to this site at any time. Parts ordered from this website may or may not be in dealer stock at the time of order. Thank you for reading.