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Chrome Piston Ring (ø 3.375 +.030)
Loopcharged: In 1976 Mercury / Mariner /Force introduced a V6 engine with loopcharged pistons. This engine was the V-175 HP 6-Cylinder. A loopcharged engine has a transfer port cast into the cylinder wall in such a way that it will direct the air / fuel mixture towards the combustion chamber and spark plug tip without the need for a piston deflector. All engines with a flat top or a slight dome on the top of the pistons will be loopcharged. Loopcharged engines will not have removable transfer port covers on the side of the cylinders.
Black Five Gauge Combination Set
Hardin Marine has done it again! Just as they have before, they have revolutionized the marine gauge market with all new gauges. They have taken all the great features that were once only available from the high priced gauge manufacturers and brought them down to an incredibly affordable price. Coupled with flood incandescent lighting, easy gasket sealed bezels and glass lens, couple that to a vibration resistant air core movement and see why this style gauge has become the standard of most boat builders today and the best part of all, it's at a price almost to good to believe. Shop and compare, we're sure your new gauges will be Hardin Marine. Hardin Marine gauges come with white light. Senders sold separately.
Not Designed to be used with Diesel Engine.
Black Nine Gauge Combination Set
Not Designed to be used with Diesel Engines.
Stainless Five Gauge Combination Set
Stainless Nine Gauge Combination Set
White Five Gauge Combination Set
White Nine Gauge Combination Set
Iron Piston Ring (ø 3.375 +.015)
Iron Piston Ring (ø 3.375 +.030)
Piston Kit (ø 2.565 +.030)
All pistons come with rings, pin and retainers.
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 / ForceThese engines use ø 3.500” Pistons
Piston Kit (ø 3.500 +.030) replaces Mercury/Mariner/Force part # 2704-821896A4
Piston Kit (ø 3.500) replaces MerCruiser part # 2704-826191T4
Piston Kit (ø 2.993 +.015) replaces MerCruiser part # 705-850026T2
Piston Kit (ø 2.993) replaces MerCruiser part # 705-850026T3
Piston STBD Kit w/ Iron Rings (ø 3.375) replaces Mercury/Mariner/Force part # 766-8666T41
Loopcharged Pistons for V6 XR4, MAG II, V-175 - V225 (1978-1990)Mercury / Mariner / ForceThese engines use ø 3.375” pistons
Piston Kit w/ Iron Ring (ø 3.375) replaces Mercury/Mariner/Force part # 766-8667T41
Piston Kit (ø 2.875 +.015) replaces MerCruiser part # 774-9137A10, 774-9137A13
Crossflow Pistons for Inline 2, 3, 4 & 6-Cylinder 35-150 HP (1970-1990)Mercury / Mariner / ForceThese engines use ø 2.875” Low Dome Pistons
Piston Kit (ø 2.875 +.030) replaces MerCruiser part # 774-9137A11, 774-9137A14
Piston Kit (ø 2.875) replaces MerCruiser part # 774-9137A9, 774-9137A12