803677002 Mercury PISTON

Introduction
This Special Instruction is intended to provide information on the Engine Overhaul Kit Consist and detailed information on specific parts that should be used based on engine arrangements.This Engine Overhaul Kit may contain extra parts and extra quantities due to the variety of engine arrangements assigned to a given kit. Refer to the corresponding Parts Manual or Disassembly and Assembly manual in Table 1.Note: This Kit may contain upgraded parts. These upgraded part numbers may be different than what you have in the parts manual or engine, but these parts have been technically reviewed for compatibility with your application. Note: This kit contains gasket kits and includes additional parts needed to perform an engine overhaul.Note: For more information, visit us at: catmarinesupport.com.Note: For assistance with technical questions, contact your local Cat dealer. Reference Material
Table 1
Engine Model     Engine Arrangements     Engine Serial Number Prefix     Parts Book Media     Disassembly and Assembly Media    
C18     342-6535
342-6543
328-4539
342-6531
342-6539
328-4538
342-6536     S/N:GPS
    SEBP5502     RENR2389    Note: For ordering reference material contact your local Cat dealer.C18 455-1191 Top End Overhaul Kit Consist
Table 2
455-1191 Top End Overhaul Kit Consist    
Gasket Kits    
Part Number     Part Name     Qty    
453-2313     Heat Exchanger Gasket Kit     1    
455-1850     Oil Cooler and Lines Gasket Kit     1    
455-1617     After Cooler and Lines Gasket Kit     1    
455-9998     Single Cylinder Head Gasket Kit     1    
Additional Parts Included in This Kit    
Part Number     Part Name     Qty    
1P-0436     Gasket     1    
1R-0749     Fuel Filter     1    
1R-1808     Engine Oil Filter     2    
2N-2766     Locknut     12    
3K-0360     O-Ring Seal     2    
6L-2280     Zinc Rod     3    
6V-5048     O-Ring Seal     1    
6V-6923     Backup Ring     1    
8S-9191     Bolt     8    
033-6033     O-Ring Seal     1    
061-9455     O-Ring Seal     1    
106-1792     Taperlock Stud     12    
248-5513     Temperature Regulator     1    
297-1813     Head Screw     12    C18 Engine Gasket Kit Locations
Illustration 1 g03686329
(1) Single Cylinder Head ( 455-9998 Gasket Kit ) (2) Aftercooler and Lines Kit ( 455-1617 Gasket Kit ) (3) Heat Exchanger ( 453-2313 Gasket Kit ) (4) Oil Cooler and Lines ( 455-1850 Gasket Kit )Gasket Kit Consists
Heat Exchanger (453-2313 Gasket Kit)
Table 3
453-2313 Gasket Kit (Heat Exchanger)    
Part Number     Part Name     Qty    
3K-0360     O-Ring Seal     2    
3S-9643     Lip Type Seal     1    
6V-9027     O-Ring Seal     2    
8C-3073     O-Ring Seal     1    
204-7844     O-Ring Seal     1    Refer to Illustration.Oil Cooler and Lines (455-1850 Gasket Kit)
Table 4
455-1850 Gasket Kit (Oil Cooler and Lines)    
Part Number     Part Name     Qty    
2M-1395     Gasket     1    
2N-0931     Gasket     1    
2P-3760     Gasket     2    
2P-4305     Gasket     4    
3D-2824     O-Ring Seal     4    
3J-1907     O-Ring Seal     2    
3J-7354     O-Ring Seal     2    
3K-0360     O-Ring Seal     1    
3S-9643     Lip Type Seal     1    
6V-3908     O-Ring Seal