Page 207 - GLM_MasterCatalog_GCBOAH

Mercury / Mariner / Force
GLM Products, Inc.

GLM’s Exclusive Marine Pistons Piston Ring Coatings Comparison TOC
• Fully Machined Hypereutectic Pistons Did you know sometimes as much as 30% of engine friction
• Featuring a Hard Anodizing Coating on Top comes from the piston rings? Therefore, 2-ring pistons have
• Resisting Temperatures up to 1560°F less friction than 3-ring pistons.
• Hardness: HV280-400 To minimize piston ring friction in the engine you should:
• Pistons are T-6 Heat Treated • Choose the right ring tension and coating Manifolds-Merc.
• GLM Pistons are 100% Cast • If oversize, check that the bore size is correct
• Change the engine oil regulary
Casting Forging
Low expansion rate Greater Strength Ring Coating Scuff Resistance Wear Resistance
Pros Lighter weight Plain Poor Low
Longer life, Lower costs Manifolds-OMC
Less strength but Heavier weight Plasma Moly Excellent Good
Cons compensated by High expansion rate Nitriding Average Excellent
strong mold process Shorter Life, Higher costs Chrome Average Excellent
Verdict For Recreational & High Performance Warning: GLM Products, Inc. will not cover the warranty for
General use Purposes
non-authorized marine engine boring services. Manifolds-Volvo
Pistons - Inline 3-Cyl. Optimax DFI Pistons - 2 & 3-Cyl. Loopcharged
75, 90, 115 HP (ø92mm / 3.630”) 30-60 HP (1994-02) (ø2.993” / 76mm)
Manifolds-Barr

MerCruiser
24600 14790

Pistons come with rings, pin & retainer. Rings come 2 in a set. Pistons come with rings, pin & retainer. Rings come 2 in a set.
Pistons Pistons
24600 OEM: 700-879858T08 Size: ø 92mm (3.630”) 14790 OEM: 705-850026T3 Size: ø 2.993”
24610 OEM: 700-896961A02 Size: ø 92mm + .015 14800 OEM: 705-850026T2 Size: ø 2.993” + .015 Merc / Mar / For
24620 OEM: 700-896962A02 Size: ø 92mm + .030 Rings
Rings 14171 OEM: 39-821695A4 Size: ø 2.993”
24670 OEM: 39-827179A12 Size: ø 92mm (3.630”) 14181 OEM: 39-821695A6 Size: ø 2.993” + .015
24680 OEM: 39-875252A12 Size: ø 92mm + .015
24690 OEM: 39-875257A12 Size: ø 92mm + .030 Pistons - Inline 2, 3, 4 & 6-Cyl. Crossflow OMC / Volvo
35-150 HP (1970-90) (ø2.875”) Low Dome
Pistons - Inline 4-Cyl. Crossflow Low Dome Pistons can replace High Dome Pistons
Johnson / Evin
30-50 HP (1970-02) (ø2.565”) without affecting engines operation.

Yamaha
14370 14010

Pistons come with rings, pin & retainer. Rings come 2 in a set. Pistons come with rings, pin & retainer. Rings come 2 in a set.
Pistons Pistons
14370 OEM: 780-9229A7 Size: ø 2.565” 14010 OEM: 774-9137A9/12 Size: ø 2.875” Index / X-Ref.
14380 OEM: 780-9229A10 Size: ø 2.565” + .015 14030 OEM: 774-8137A10/13 Size: ø 2.875” + .015
14390 OEM: N/A Size: ø 2.565” + .030 14050 OEM: 774-9137A11/14 Size: ø 2.875” + .030
Rings Rings
14241 OEM: 39-18653A12 Size: ø 2.565” 14210 OEM: 39-817096A6 Size: ø 2.875”
14251 OEM: 39-18653A1 Size: ø 2.565” + .015 14220 OEM: 39-817096A16 Size: ø 2.875” + .015 Warranty
14261 OEM: N/A Size: ø 2.565” + .030 14230 OEM: 39-817096A26 Size: ø 2.875” + .030

www.glmmarine.com
207