This piston kit will fit Mercury 6 Cyl. 140 HP 78-81 Inline 6 Cross Flow W/Boost Port Low Dome engines. Piston is a full cast and comes with Rik Japanese high performance rings. Wiseco pistons are forged and use Wiseco high performance rings.
Order Std size pistons if you are only honing your cylinders. If you have more damage to the bore and the cylinder will not clean up at STD. Please order the correct over size piston kit. Be sure to inspect your sleeves carefully for chipping and cracks. If you have damages beyond boring click Cylinder Resleeving Services for more information and pricing.
Please note:
These are not cheap copies, they are a direct and quality replacement piston exactly like OEM. The rings are from RIK. the top ring manufacturer in the world, be aware that competitors will use Taiwan rings and may fail at any time. If it doesnt say RIK, its not and there is a difference!
Complete top end rebuild kit includes:
1 Piston
1 Set Rings Click here for Ring Set ONLY
1 Pin
2 Clips
Oem Part# 774-8600A 3
This Piston Kit will fit the following applications only,
Mercury
6 Cyl. 140 HP 78-81 Inline 6 Cross Flow W/Boost Port Low Dome
