Mercruiser outdrive parts drawing *Videos *SEI sterndrive

Co-manufacturer and distributor of GLM aftermarket Mercruiser parts. Drawings and Alpha 1 repair videos

Last updated on 3/21/2023, 10:41:55 PM

YouTube repair videos

Tech support
Mercruiser sterndrive parts drawings
Click Here

Printer friendly repair help, look it over

Search by part number or description here

Click image below for Mercruiser parts

Transom Bellows Kit

Water Pump Kits

Bellows kit

Seal kits

Lower Unit

Exhaust Manifolds


Lower Unit Outdrive

Mercruiser Alpha 1 upper sterndrive parts

Upper Housing

Shift Cables

Gears / Clutch Dog

U Joints

21905 Gimbal bearing OEM Mercruiser serial number 30-862540A3

Bell housing tech drawing

Hydraulic Cylinders and Hoses

Power trim tilt cylinder repair parts

Mercruiser trim cylinders breakdown

Engine coupler

Trim Sender


Used Mercruiser parts

Mercruiser transom shift cable parts


Yoke and drive shaft nut assembly

Engine parts

Water separator

Fuel pump

Drive shaft


28310 Yoke Upper

Carburetor kit

Alpha One Prop Shafts

SEI Bravo one lower unit sterndrives

32470 Exhaust gasket

Engine overhaul gasket kit Mercruiser or Ford motor

Alpha One and Mercruiser gimbal housing parts

Need Tech support

Technical support is available from Wayne our tech service rep in person Toronto, Canada location

If you require tech help please have your Mercruiser serial number on file
Search on Goggle for YouTube videos by Wayne Coll or T.C. Electronics/Marine
there is about 72 boat repair video in total as of 2019 there is no charge to view

Example of Mercruiser sterndrive videos on YouTube
  • Mercruiser outdrive shift cable and bellows repairs 593,228 views
  • Water pump removal and repair video 320,214 views
  • How do I remove my Alpha One gen 2 lower unit 76,350 views
  • 65 repair video on YouTube for Mercury Marine outboard or Mercruiser outdrive parts
  • Help to identify Mercruiser and Alpha One or Generation 2 outdrive
    and identify your Mercury and Yamaha outboard parts

Click here for shift cable installation instructions

Identify what type lower unit you have this is an easy way to help with identifying what you have.

Once you have identified your Mercury Marine lower unit, finding the component that is right for your application is simple.

Cross reference Help

Gas engine and Diesel engine help guide for model number, engine make, motor size, model year and serial number. Carburetor cross reference models


Bell housing parts and tech support layout

Gimbal bearing housing tech support drawing

Water pump application chart with model number, kit, impeller and serial number ignition application with model number and years


Component applications: Manifold model 120 – 262 Mag.

(chart 2) 215 – 898 (chart 3) 140 – 4.3 liter (chart 4) 225 – 350

GLM Marine

High quality / cost effective aftermarket parts for your Alpha One sterndrive.

No other aftermarket manufacturer can compete with the variety of gears, gear sets, drive shafts, seal kits, and gear cases that we stock for rebuild kits.

We are a factory authorized dealer for GLM Products.

To find the correct part for your application, we offer Alpha One and Alpha One gen 2 parts breakdown drawings, complete with images for each part number.


We stock tools for removal of Alpha One parts such as bearing carriers, bearing retainers and special wrenches.

Tech support includes illustrations to identify Mercruiser part with exploded view Alpha One lower gearcase drawings as well as technical support by phone

Shipping Locations Monrovia CA. 91016 USA
Toronto ON. M1R 5G2 CAN.

International shipping cost

International word wide Fed ex rates

Hawaii or Alaska air freights click here

What’s New ?

Seloc repair manuals for Chrysler, Force, Yamaha, Mariner, Mercury and Johnson outboard parts. Volvo Penta, OMC sterndrive books. Sea water pumps, GM V6 / V8 Engine thunderbolt IV and V distributors. Delco ignition module / sensor assembly and repair tools. GLM aftermarket Pleasure-Craft marine parts, Suzuki and Yamaha outboard engine components.

Coming Soon

Chris Craft, Mariner, Force, Chrysler outboard, Crusader engine components with inboard / outboard engines. Johnson pump OEM to GLM component conversion table. Genuine Mercury/Mercruiser engine parts and remanufactured sterndrives

Used Parts

We stock used stern drive components. We also stock used boat parts and Mercruiser sterndrive units for the boating enthusiasts who wants to keep repair costs down. Contact us for used sterndrive parts at (416) 751-7326 our customer service line.

Web Pricing

All web pricing in US funds

GLM Catalog

Includes 206 page PDF catalog of stern drive components with illustrations
Online catalog is comprised of PDF files. In order to view them, you need Acrobat Reader. You can download Acrobat Reader free from adobe. Once the catalog is opened on your screen, you can view pages or print drawings.

Water pump note:

Mercruiser, MC-1 lower unit and the Alpha One lower unit can be used with the same upper gearcase.
That said the replacement water pumps are not the same for both sterndrive units.

Example: let say you have this upper gearcase showing and your boat is years 1970 to 1983 our GLM Marine water pump kit is number 12110 how ever if the lower unit was replaced with the newer Alpha 1 that came out in 1984 to 1993 the GLM Marine water pump kit is number 12120.

The water pump base, gasket and o-ring is not the same. You can the year of the lower units for years 1970 thru 1983 by the vertical drive shaft end that has the 1/4 pin in it about 5/8 of inch long and Alpha one drive shaft has no pin on the end.

Over the years your Mercruiser outdrive lower unit may have been replaced after all unit is about 40 plus year old. Need more help just send us a picture to or call customer service Brian Tanask 416-752-7278 on the order desk for the tech service number.

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