We offer a selection of 2.5-liter high-performance cylinder head gasket thicknesses that fit all 1991 - 2005 gasket-head Mercury / Mariner 2.5 Liters; XR6, 175HP, 200HP, 225HP, 245HP, 260 ROS, CC, EE, FF, FF, NN, LL, PP, SS blocks and F200 race 2-stroke powerheads to increase compression and performance
 
Head Gasket Thickness & Suggested Clearence
 
0.75mm (0.0295" thickness) is suggested for pistons at .008" (or more) below deck height
 
1.00mm (0.0393" thickness) is suggested for pistons at .000" (or more) below deck height
 
1.10mm (0.0433" thickness) is suggested for pistons at .004" (or less) over deck height (
 
1.20mm (0.0472" thickness) is suggested for pistons at .008" (or less) over deck height 
 
1.50MM (0.0591" thickness) is suggested for pistons at .020" (or less) over deck height
 
Racer who have explored the limits may be able to run tighter squish clearances.
 
Part Numbers:
814658, 8146581, 18-3864, 184721, 35870, 822844, 822844T04, 822844T05, 822844004, 8228441, 8228442, 8228443, 9-63854, 814658-1 0.75, 822844-1 1.00, 27-840322-1 1.50
 
Includes one (1) cylinder head gasket for a Mercury 2.5 Liter Outboards. 
The V6 powerhead requires two (2) gaskets if both heads are removed. Order the number of head gaskets needed and select your thickness before checkout.
 
Contact Mike Hill at +1-714-697-1716 or mike@buckshotracing77.com with any questions or to discuss the right head gasket thickness for your motor.