Mastertech Marine: MERCRUISER STERN DRIVE REPLACEMENT GEARCASES R & MR MODELS 1969-1990

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If your supplier 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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GEARCASES

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

R & MR MODELS THRU 1990

ALPHA GEN II MODELS 1991-UP HERE
BRAVO ONE MODELS HERE
BRAVO TWO MODELS HERE
BRAVO THREE MODELS HERE

NOTE!! You MUST PROVIDE THE MODEL and SERIAL NUMBER when ordering.
I cannot send you the correct parts otherwise!

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

These units carry a 3 (THREE) year warranty. This is a supplier warranty.
These are new units, NO CORE is required.

Gearcases are subject to availability.
ALL UNITS PRICED WITH UPS GROUND SHIPPING.
FedEx 3-day or quicker available at extra cost

R/MR/ALPHA ONE STANDARD PRODUCTION MODELS
ENGINE	HP	LITRE/ C.I.D.	CYLINDERS	GEAR RATIO	TOOTH COUNT	YEAR
2.5 LITRE	120	2.5 / 153	INLINE 4	198:1	20 / 24	1969-90
3.0 LITRE	130	3.0 / 181	INLINE 4	1.98:1	20 / 24	1969-90
165	165	3.7 / 224	INLINE 4	1.84:1	17 / 19	1969-90
175	175	4.3 / 262	V-6	1.84:1	17 / 19	1969-90
180, 470,190	180	3.7 / 224	INLINE 4	1.84:1	17 / 19	1969-90
200	200	5.0 / 305	V-8	1.65:1	20 / 24	1969-90
205	205	4.3 / 262	V-6	1.84:1	17 / 19	1969-90
230	230	5.0 / 305	V-8	1.50:1	20 / 22	1969-90
260	260	5.7 / 350	V-8	1.50:1	20 / 22	1969-90
350 MAGNUM	270	5.7 / 350	V-8	1.50:1	20 / 22	1969-90

R & MR MODELS (thru 1990)
UPPER (DRIVESHAFT) UNIT	CORE CREDIT up to:	PRICE	PURCHASE
MERCRUISER NEW UPPER 1969-1990 RATIO 150:1 (V8 MOTORS)	NO CORE REQUIRED	$1,120 MC-AU-150-N
MERCRUISER NEW UPPER 1969-1990 RATIO 165:1 (6 CYL MOTORS)	NO CORE REQUIRED	$1,120 MC-AU-165-N
MERCRUISER NEW UPPER 1969-1990 RATIO 184:1 (MERCRUISER 470 MOTORS)	NO CORE REQUIRED	$1,120 MC-AU-184-N
MERCRUISER NEW UPPER 1969-1990 RATIO 198:1 (GM 4 CYL)	NO CORE REQUIRED	$1,120 MC-AU-198-N
LOWER (PROPSHAFT) UNIT	CORE CREDIT up to:	PRICE	PURCHASE
4-6-8 CYLINDER 1969-1990	NO CORE REQUIRED	$1,241 MC-AL-N
COMPLETE DRIVES	CORE CREDIT up to:	PRICE	PURCHASE
MERCRUISER NEW DRIVE COMPLETE 1969-1990 RATIO 150:1 (V8 MOTORS)	NO CORE REQUIRED	$2,253 MC-AC-150-N
MERCRUISER NEW DRIVE COMPLETE , 1969-1990 RATIO 165:1 (6 CYL MOTORS)	NO CORE REQUIRED	$2,253 MC-AC-165-N
MERCRUISER NEW DRIVE COMPLETE 1969-1990 RATIO 184:1 (MERCRUISER 470/3.7L MOTORS)	NO CORE REQUIRED	$2,253 MC-AC-184-N
MERCRUISER NEW DRIVE COMPLETE 1969-1990 RATIO 198:1 (GM 4 CYL)	NO CORE REQUIRED	$2,253 MC-AC-198-N

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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. All prices include ground shipping within the 48 contiguous United States. 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.