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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!
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.


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(NOT For King Cobra drives)

OMC introduced the Cobra drive in mid-1985 (although they were marketed as 1986) to replace the old stringer models, which had gear-driven tilt, rather than external hydraulic cylinders like the Cobra. Cobra drives mounted to the transom itself, intead of being mounted directly to the engine and sticking out through a hole in the transom like the stringer drives did. Aside from the hydraulic rams on the Cobra, tho most ovbious difference between the two was a large square rubber seal around the drive at the transom for the stringer drives, and a large visible gear for the tilt on the port side of the stringer's upper case.

COBRA SX models began shipping in the 1994 model year, replacing the original Cobra drive. This was a joint venture between OMC and Volvo Penta. OMC sold their interest in these drives back to Volvo Penta in 1998 when they got out of the stern drive business; Volvo continues to make them. The most obvious difference between most original Cobra drives and the Cobra SX models was that the Cobra SX had a belt-driven seawater pump on the front of the engine; the original Cobras had a shaft-driven water pump inside the upper gearcase. Externally they look very similar.

Exhaust Bellows
Original Cobra thru 1993

914036 85036 18-2764 9-72706

Click Image For Larger

Exhaust Bellows
COBRA SX 1994-up

3850426 85246 18-1074

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U-joint Bellows
All Models Cobra & SX
85127 3854127 85127 18-2765
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Shift Cable Boot
Original Cobra thru 1993
85826 911826 85826 18-2763
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Outdrive Mounting Kit
(Discard gasket for use
with Cobra SX)
85105 508105 85105 18-2613
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Gimbal Bearing
All Models Cobra & SX
(Also fits Mercruiser)
64794 3853807 18-2100 60794A4
Transom Service Kit
Original Cobra thru 1993
85127K 85127K 18-2771
Click Image For Larger

Transom Service Kit
COBRA SX 1994-up
85426K 85426K 9-72931
Click Image For Larger

Upper Seal Kit
Original Cobra thru 1993
62202 987603 18-2673
Click Image For Larger

Gearcase Seal Kit
4-cyl 1983-90
81887 985612 81887 18-2671 9-74401
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Gearcase Seal Kit
V6 & V8 1986-93
4-cyl 1991-93
18-2672 439967 18-2672 984458
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"Horseshoe" Anode
Original Cobra thru 1993
6028 3853818 6028 18-6028 3855411
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Gearcase Anode
Original Cobra thru 1993
6024 436745 6024 18-6024
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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.


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.