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:
Product Details:
BORE SIZE: 2.580/.015
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You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).
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