Mercury 724-1631A2 Piston Assembly NO PIN 200 20hp 500 50hp Mark 55 58 700 400 40hp Volvo Penta 3857298

Volvo Penta 3857298

Used with most Mercruiser Inline 4-cyliinder 2

From a AQ125A 4-Cylinder Sterndrive SN 76 79009187 (B21 Block) Also found on AQ120B AQ140A BB140A

It also might be one of these 71649 76739 ( Used with power steering) Not Sure

Mercury 724-1631A2 Piston Assembly NO PIN 200 20hp 500 50hp Mark 55 58 700 400 40hp Volvo Penta 3857298Part Number(s) Included Mercury 724 1631A2 Piston Assembly Pin is missing Not Included Casting Number is 724 1631 39 27841 Piston Rings are still installed General Application Compatibility Make sure the piston you are replacing matches this casting number This assembly appears in the following diagrams but make sure to look into this further as sometimes part application was serial number specific MARK 55AE, 55AM, 58AE, 58E (All) MARK MARK 75A, 78,