Overton's
For everything else boating related.

Wondering
"Where-'n-'Ell"
to get great parts for your outboard?

Right Here!

 

I'm Restoring A 1955 Merc MK55 Sandcast

1955 Mark 55 Sandcast Restoration

 

Meet the MasterTech!

Bill the Master Tech

 

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!!

Contact
the Mastertech!

 


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NEW & REBUILT GEARCASES

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

Need a COBRA drive mounting gasket kit (1986-UP)? It's HERE

warning symbolNOTE!! You MUST PROVIDE THE MODEL and YEAR when ordering. I cannot send you the correct parts otherwise!
Also, please be sure what you have: OMC Stern Drives (Stringer Models) are tilted by an external gear (mechanical tilt); OMC Cobra Models are hydraulically tilted and have the water pump in the upper gear housing; Cobra SX models are likewise tilted but are manufactured starting with the 1994 model year and have a belt-driven seawater pump on the motor.
COBRA SX drives are NOT AVAILABLE from our rebuilder at this time.

Please take the time to enter the model and serial number of your motor in the shopping cart. Thanks!

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.

OMC STERN (STRINGER) DRIVE COMPONENTS
400/800 SERIES UP TO 1985
NO CORE VALUE ON ANY STRINGER DRIVE COMPONENTS

UPPER UNITS ARE HOUSING & INTERNALS ONLY --
NO SHIFT CABLES, STEERING WORM GEARS, ETC.
ONLY UPPER & LOWER UNITS ARE AVAILABLE;
NO MIDSECTIONS (WHERE THE WATER PUMP IS)
CALL FIRST IF YOU HAVE QUESTIONS

CYL
DESCRIPTION CORE PRICE PURCHASE
ALL
1973-1986
OMC Stern (Stringer) Drive
BALL GEAR REPLACEMENT KIT
1973-1986 MODELS
$229.00 18-2178
4
OMC Stern (Stringer) Drive
4-CYLINDER
NEW Upper 1978-80
No Core
Required
$2,116 OM-FMU-4-N
6
OMC Stern (Stringer) Drive
6-CYL 170-185 HP 3.8L V6
NEW Upper 1978-80
No Core
Required
$2,116 OM-FMU-6-N
8
OMC Stern (Stringer) Drive
8-CYLINDER 5.0 185-230 HP
NEW Upper 1978-80
No Core
Required
$2,116 OM-FMU-81-N
8
OMC Stern (Stringer) Drive
8-CYLINDER 5.7L 260 HP
NEW Upper 1978-80
No Core
Required
$2,116 OM-FMU-82-N
4
OMC Stern (Stringer) Drive
4-CYLINDER
Rebuilt Lower 1978-80
No Core
Required
$1,792 OM-FML-4-R
6, 8
OMC Stern (Stringer) Drive
6 & 8-CYLINDER
Rebuilt Lower 1978-80
No Core
Required
$1,792 OM-FML-68-R
6, 8
OMC Stern (Stringer) Drive
6 & 8-CYLINDER
NEW Lower 1978-80
No Core
Required
$2,212 OM-FML-68-N
CYL
DESCRIPTION CORE PRICE PURCHASE
4
OMC Stern (Stringer) Drive
120-140 HP 2.5 - 3.0L
NEW Upper 1981-85
No Core
Required
$2,116 OM-FMU-4-N
6
OMC Stern (Stringer) Drive
170-185 HP 3.8L V6
New Upper 1981-85
No Core
Required
$2,116
OM-FMU-6-N
8
OMC Stern (Stringer) Drive
185-230 HP 5.0L V8
New Upper 1978-85
No Core
Required
$2,116
OM-FMU-81-N
8
OMC Stern (Stringer) Drive
185-230 HP 5.7L V8
New Upper
1978-85
No Core
Required
$2,116
OM-FMU-82-N
NOTE: THESE LOWER UNITS REPLACE HYDRO-MECHANICAL VERSIONS WITH FULL MECHANICAL LOWERS. SEE INSTRUCTIONS TO ADAPT YOURS IF YOU HAVE A HYDRO-MECHANICAL UNIT.
CYL
DESCRIPTION CORE PRICE PURCHASE
4
OMC Stern (Stringer) Drive
120-140 HP 2.5L-3.0L
Rebuilt Lower 1981-85
No Core
Required
$1,792
OM-FML-4-R
6, 8
OMC Stern (Stringer) Drive
170-260 HP 3.8L-5.0L-5.7L
Rebuilt Lower 1981-85
No Core
Required
$1,792
OM-FML-68-R
6, 8
OMC Stern (Stringer) Drive
170-260 HP 3.8L-5.0L-5.7L
New Lower 1981-85
No Core
Required
$2,212
OM-FML-68-N
OMC COBRA DRIVE GEARCASES
1986-1993
CORE VALUE AS NOTED
UPPER GEAR HOUSING ASSEMBLIES
CYL
DESCRIPTION CORE PRICE PURCHASE
4
OMC COBRA Drive
120 HP 2.3L
Rebuilt Upper 1986-90
$150
$2,026
CO-SU-23-R
4
OMC COBRA Drive
120 HP 2.3L
NEW Upper 1986-90
$150
$2,206
CO-SU-23-N
4
OMC COBRA Drive
130 HP 3.0L
Rebuilt Upper 1986-89
$150
$2,026
CO-SU-30-R
4
OMC COBRA Drive
130 HP 3.0L
NEW Upper 1986-89
$150
$2,206
CO-SU-30-N
4
OMC COBRA Drive
130 HP 3.0L
Rebuilt Upper 1990-93
$150
$2,026
CO-SU-31-R
4
OMC COBRA Drive
130 HP 3.0L
NEW Upper 1990-93
$150
$2,206
CO-SU-31-N
6
OMC COBRA Drive
175 HP 4.3L V6
Rebuilt Upper 1986-93
$150
$2,026
CO-SU-43-R
6
OMC COBRA Drive
175 HP 4.3L V6
NEW Upper 1986-93
$150
$2,206
CO-SU-43-N
8
OMC COBRA Drive
230 HP 5.0L V8
Rebuilt Upper 1986-93
$150
$2,026
CO-SU-50-R
8
OMC COBRA Drive
230 HP 5.0L V8
NEW Upper 1986-93
$150
$2,206
CO-SU-50-N
8
OMC COBRA Drive
260 HP 5.7L-5.8L V8
Rebuilt Upper 1986-93
$150
$2,026
CO-SU-57/58-R
8
OMC COBRA Drive
260 HP 5.7L-5.8L V8
NEW Upper 1986-93
$150
$2,206
CO-SU-57/58-N
LOWER GEAR HOUSING ASSEMBLIES
CYL
DESCRIPTION CORE PRICE PURCHASE
4
OMC COBRA Drive
2.3L-3.0L
Rebuilt Lower 1986-89
NO CORE
REQUIRED
$1,786
CO-SL-4-R
4,6,8
OMC COBRA Drive
3.0L 1990-93
4.3L V6 1986-92
5.0, 5.7, 5.8L V8 1986-93
Rebuilt Lower
NO CORE
REQUIRED
$1,786
CO-SL-468-R
4,6,8
3.0L 1990-93
4.3L V6 1986-92
5.0, 5.7, 5.8L V8 1986-93
NEW Lower
NO CORE
REQUIRED
$2,146
CO-SL-468-N
OMC COBRA DRIVES COMPLETE
CORE VALUE ON UPPER HOUSING ONLY
NO CORE VALUE ON LOWER
1986-91 with 1-3/16" PROPSHAFT USE #333592 PROP THRUST WASHER
1992-93 with 1-1/4" PROPSHAFT USE #126870 PROP THRUST WASHER
CYL
DESCRIPTION CORE PRICE PURCHASE
4
OMC Cobra Drive COMPLETE
120 HP 2.3L
Rebuilt Assembly
1986-89
$150
$3,743
CO-SC-23-R
4
OMC Cobra Drive COMPLETE
130 HP 3.0L
Rebuilt Assembly
1986-89
$150
$3,743
CO-SC-30-R
4
OMC Cobra Drive COMPLETE
130 HP 3.0L
Rebuilt Assembly
1990-93
$150
$3,743
CO-SC-31-R
4
OMC Cobra Drive COMPLETE
130 HP 3.0L
NEW Assembly
1990-93
$150
$4,211
CO-SC-31-N
6
OMC Cobra Drive COMPLETE
175, 185, & 205 HP 4.3L V6
Rebuilt Assembly
1986-93
$150
$3,743
CO-SC-40-R
6
OMC Cobra Drive COMPLETE
175, 185, & 205 HP 4.3L V6
NEW Assembly
1986-93
$150
$4,211
CO-SC-40-N
8
OMC Cobra Drive COMPLETE
230 HP 5.0L V8
Rebuilt Assembly
1986-93
$150
$3,743
CO-SC-50-R
8
OMC Cobra Drive COMPLETE
230 HP 5.0L V8
NEW Assembly
1986-93
$150
$4,211
CO-SC-50-N
8
OMC Cobra Drive COMPLETE
260 HP 5.7, 5.8L V8
Rebuilt Assembly
1986-93
$150
$3,743
CO-SC-57/58-R
8
OMC Cobra Drive COMPLETE
260 HP 5.7, 5.8L V8
NEW Assembly
1986-93
$150
$4,211
CO-SC-57/58-N
COBRA Outdrive Mounting Gasket Kit 85105
All COBRA except King Cobra Big Block 1986-1993
Also fits COBRA SX
(gasket not used)
$7.00
DON'T SEE WHAT YOU NEED? JUST ASK.
QUICK QUOTE 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 FEDEX 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.