Mastertech Outboard Motor Repair Parts and Marine Servicing Mercury Mariner Gearcases.

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to get great parts for your outboard?

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I'm Restoring A 1955 Merc MK55 Sandcast

1955 Mark 55 Sandcast Restoration

Meet the MasterTech!

If your Mfgr. says:

That motor's 7 years old.
Part is no longer available.
We lose $$ on service!
EPA made me do it!
Parts at central warehouse, you'll get them 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 FOR A 6 CYLINDER MERC? FIND IT HERE.

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

NOTE!! You MUST PROVIDE THE SERIAL NUMBER when ordering. I cannot send you the correct parts otherwise!
BE SURE to specify shaft length (measure from top of gearcase to top of driveshaft)

Please take the time to enter the serial number of your motor!
It will be stored in the shopping cart and sent in with your order.
Please also supply the folowing information. Thanks!

Serial #

Length of Driveshaft

Number of reverse gear jaws (see above notes)

First On line purchase?

HOW TO TELL THE NUMBER OF REVERSE GEAR JAWS:
EXAMINE TAB AGAINST TRIM FIN SCREW

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. Most units have core value (included in price). Return shipping for cores is prepaid, if you have a repairable unit. MasterTech will remit the core credit after evaluation by the rebuilder.

Rebuilt and new gearcases are subject to availability.

MERCURY/U. S. MARINER GEARCASES
CYL	DESCRIPTION	CORE	PRICE	PURCHASE
3	Mercury/Mariner Rebuilt Lower 60 HP 1991-2003	$200	ME-G3-03-R $1,884
3	Mercury/Mariner Rebuilt Lower 60 HP BigFoot 1995-1997 3-Jaw & 6-Jaw NOTE: Did you remember to specify 3 or 6-Jaw Reverse gear above? NOTE: 3-Jaw units thru 1997 are not available NEW. Updating to a new 6-Jaw unit requires an updated shift rod (available from MasterTech thru Mercury)	$250	ME-G3-04-R $1,908
3	Mercury/Mariner Rebuilt Lower 60 HP BigFoot 1998-2003 3-Jaw & 6-Jaw NOTE: Did you remember to specify 3 or 6-Jaw Reverse gear above?	$250	ME-G3-05-R $1,908
3	Mercury/Mariner Rebuilt Lower 70-90 HP 1987-1997 3-Jaw & 6-Jaw NOTE: Did you remember to specify 3 or 6-Jaw Reverse gear above?	$250	ME-G3-06-R $1,908
3	Mercury/Mariner NEW Lower 70-90 HP 1987-1997 3-Jaw & 6-Jaw NOTE: Did you remember to specify 3 or 6-Jaw Reverse gear above?	$250	ME-G3-06-N $2,148
3	Mercury/Mariner New Lower 75-90 HP 1998-2003 6-Jaw	$250	ME-G3-07-N $2,148
3	Mercury/Mariner Rebuilt Lower 75-90 HP 1998-2003 6-Jaw	$250	ME-G3-07-R $1,908
3	Mercury New Lower 75-90 HP OPTIMAX 2004-2005	$250	ME-G3-09-N $2,268
CYL	DESCRIPTION	CORE	PRICE	PURCHASE
4	Mercury New Lower 75-90 HP 2000-2002 4 Stroke EFI	$250	ME-G4-08-N $2,268
4	Mercury New Lower 75-90 HP 2003-2009 4 Stroke EFI	$250	ME-G4-09-N $2,268
4	Mercury/Mariner New Lower 110-115-125 HP 1988-1997 20" original is 3-Jaw, replacement is 6-Jaw lower NOTE: 3-Jaw units thru 1997 are not available NEW. Updating to a NEW 6-Jaw unit requires an updated shift rod (available from MasterTech thru Mercury)	$250	ME-G4-02-N $2,148
4	Mercury/Mariner Rebuilt Lower 110-115-125 HP 1988-1997 20" 3-Jaw & 6-Jaw NOTE: Did you remember to specify 3 or 6-Jaw Reverse gear above?	$250	ME-G4-02-R $1,908
4	Mercury/Mariner New Lower 110-115-125 HP 1988-1997 25" original 3-Jaw replacement 6-Jaw lower NOTE: 3-Jaw units thru 1997 are not available NEW. Updating to a NEW 6-Jaw unit requires an updated shift rod (available from MasterTech thru Mercury)	$250	ME-G4-03-N $2,148
4	Mercury/Mariner Rebuilt Lower 110-115-125 HP 1988-1997 25" 3-Jaw & 6-Jaw NOTE: Did you remember to specify 3 or 6-Jaw Reverse gear above?	$250	ME-G4-03-R $1,908
4	Mercury/Mariner New Lower 110-115-125 HP 1998-2003 20" 6-Jaw	$250	ME-G4-04-N $2,148
4	Mercury/Mariner Rebuilt Lower 110-115-125 HP 1988-1997 20" 6-Jaw	$250	ME-G4-04-R $1,908
4	Mercury/Mariner New Lower 110-115-125 HP 1998-2003 25" 6-Jaw	$250	ME-G4-04-R $2,148
4	Mercury/Mariner Rebuilt Lower 110-115-125 HP 1998-2003 25" 6-Jaw	$250	ME-G4-05-R $1,908
4	Mercury New Lower 115 HP 2000-2003 4 Stroke Serial # 0T178500 - 0T800999	$250	ME-G4-00-N $2,340
4	Mercury New Lower 115 HP 2004-2006 4 Stroke Serial # 0T801000 and up	$250	ME-G4-01-N $2,340
CYL	DESCRIPTION	CORE	PRICE	PURCHASE
4	Mercury Rebuilt Lower 115 HP OPTIMAX 2004-2006 20"	$250	ME-G4-13-N $2,268
4	Mercury New Lower 115 HP OPTIMAX 2004-2006 25"	$250	ME-G4-14-R $2,268

DON'T SEE WHAT YOU NEED? JUST ASK. QUICK QUOTE FORM
QUICK SECURE ORDER FORM

Now that you have found what you need, please order it using the shopping cart above, the secure quick order form, or call in your order. Prices iinclude shipping by UPS 3 day within the 48 contiguous United States only. Some bulky and extremely heavy items may 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.

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