GLM

Piston Kit (ø 2.565 +.030)

All pistons come with rings, pin and retainers.

GLM’S EXCLUSIVE MARINE PISTONS
• Fully Machined Hypereutectic Pistons
• Featuring a Hard Anodizing Coating on Top
• Resisting Temperatures up to 1560°F
• Hardness: HV280-400
• Pistons are T-6 Heat Treated

Crossflow: The oldest design, and the one used on Mercury / Mariner /Force 35-150 HP engines from 1970-1990 is the crossflow piston. As the air / fuel mixture travels through the transfer port and into the cylinder, a deflector, cast into the top of the piston, directs the air / fuel mixture towards the combustion chamber and spark plug tip for maximum efficiency. All engines with deflectors on top of the pistons will be crossflow engines. External inspection of a crossflow engine will reveal removeable transfer port covers on the side of the cylinders.

Piston Kit (ø 3.500 +.015) replaces Mercury/Mariner/Force part # 2704-821896A3

Loopcharged Pistons for Inline 3 & 4-Cylinder 65-115 HP (1994-2000)
Mercury / Mariner / Force
These engines use ø 3.500” Pistons

Piston Kit (ø 3.500 +.030) replaces Mercury/Mariner/Force part # 2704-821896A4

Loopcharged Pistons for Inline 3 & 4-Cylinder 65-115 HP (1994-2000)
Mercury / Mariner / Force
These engines use ø 3.500” Pistons