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The Evolution of a Dream: GLM's Conversion Kits
  GLM Products, Inc. takes things a few fathoms deeper. While most aftermarket marine parts manufacturers outsource their design and production, GLM's specialty is...
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Superior Manifolds: High Quality, Cost-Effective Aftermarket Marine Parts
  To some observers, the aftermarket parts business may seem rather repetitive. After all, it's already been done, right? In many industries this may be true, but GLM Products, Inc. has redefined the meaning...
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GLM Offers Help for Dealers
  Over the past 20 years, GLM Products, Inc. has developed an extensive line of innovative and cost-effective marine engine and drive parts. With over 4,000 line items available, including many that are only available from GLM...
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Lost Foam: A New Wave of Sand Casting Swells in the Marine Industry
  With the growing demand for high quality aftermarket marine products, new technological advances have impacted the marine industry in a huge and significant way. While one sand casting...
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History of Johnson/Evinrude V4 Outboard
  One of the most daunting tasks a young outboard technician encounters is sorting out all of the different models...
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30 Years of the OMC Sterndrive
  The OMC stern drive was produced by the Outboard Marine Corporation from 1962 until the end of 1992...
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Sand-Cast vs. Die-Cast
  Whether or not a product is sand-cast or die-cast is determined by many considerations. One of the main considerations that GLM uses for any product, that it produces is: can we improve it?...
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Pistons: Cast vs. Forged
  The major disadvantages to forged pistons are actually a result of the forging process itself. Forging results in a piston that is considerably heavier, than cast pistons, and is limited in the aluminum alloys that can be used to produce the piston...
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Servicing Your Sterndrive/Drive Unit
  How often should it be done? Most manufacturers recommend sterndrive/drive unit maintenance every 50 hours. To most boaters this equates to once per season. Usually the best time to perform this service is the same time that you winterize your boat...
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INSTRUCTION SHEETS

V6 Conversion Kit - Single-Piece Manifolds to Center Rise Manifolds
V8 Conversion Kit - Log-Style Manifolds to 4" Center Rise Manifolds
GLM Aluminum Manifolds
10 Hour Break-in for All GLM Gears
GLM Seawater Pump 12088 Assembly
MERC 120/140 - Inline 4, 153/181 CID, 4-Cyl. (1982-95)
V4 Prop Shaft & Clutch Dog
Shimming Tool GLM No.90330

DIMENSIONS / DIAGRAMS

Dimensions - MERC Manifolds
Dimensions - OMC Manifolds
Dimensions - VOLVO PENTA Manifolds
Dimensions - BARR / INDMAR / MARINE POWER Manifolds
Dimensions - MERC - OMC Overlap
Diagram - Water/Fuel Separator Mounting Bracket
V6 Conversion Kit
V8 Conversion Kit
GLM Aluminum Manifolds
10 Hr. Break-in for Gears
Seawater Pump 12088 Assembly
Merc Models 120/140
V4 Prop Shaft & Clutch Dog Assembly
Shimmin Tool
MERC Manifold Dimensions
OMC Manifold Dimensions
VOLVO PENTA Manifold Dimensions
BARR / INDMAR / MPOWER Manifold Dimensions
MERC-OMC Overlap Dimensions
Water/Fuel Separator Diagram
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