Piston - .015 Mercury - Sierra Marine Engine Parts - 18-4621 (118-4621)

MERCURY MARINE 780-9229A10 is the OEM component number. 40-50 HP; 4 cylinder; 2.580/.015 bore Wrist Pin (Not Sold Separately)18-4294 Circlips - replaces O.E.# 40-5203518-4621 Piston - replaces O.E.# 780-9229A1018-3967 Piston Ring - replaces O.E.# 39-18653A1 Wrist Pin (Not Sold Separately)18-4294 Circlips - replaces O.E.# 39-18653A1 Wrist.

Oil control rings are installed to scrape excess oil off the walls. A three-piece oil control ring in the bottom ring position distinguishes pistons. They virtually never have needle bearings between the wrist pin and connecting rod and almost always have a flat or dished top (like two-stroke engines). Hypereutectic pistons are fully machined.

The set includes rings, a pin, and two retainers.

Key Features:

• Aluminum alloy with a high silicon concentration is an exact replacement and same as the weight.
• Removes the necessity for unnecessarily replacing all pistons.
• The piston rings, bearings, wrist pins, and circlips can be swapped out.
• Original equipment manufacturer parts.
• Repairs are simple, faster, and less expensive of this feature.
• Hypereutectic pistons are fully machined.

Product Details:

• SKU: 18-4621
• UPC: 808282125189
• Weight: 0.72 LBS
• Brand: SeaStar Solutions

BORE SIZE: 2.580/.015

This product replaces:

47-4621, 780-9229A10, 808282125189