803756 1 Mercury STOPPER

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     343-6636
343-6639
328-4515     S/N:GES     SEBP4768     RENR2389    
290-5693 S/N:J2K
    SEBP5502     RENR2389    
320-9801
320-9809
345-8311
320-9805
320-9800
320-9797 S/N:T2P     SEBP4770     RENR2389    Note: For ordering reference material, contact your local Cat dealer.C18 455-1186 Major Overhaul Kit Consist
Table 2
455-1186 Major Overhaul Kit Consist    
Gasket Kits    
Part Number     Part Name     Qty    
417-9667     Rear Structure Gasket Kit     1    
453-2313     Heat Exchanger Gasket Kit     1    
455-3631     Oil Cooler and Lines Gasket Kit     1    
455-1617     After Cooler and Lines Gasket Kit     1    
455-1871     Central and Lower Structure     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    
2S-4078     O-Ring Seal     2    
3K-0360     O-Ring Seal     4    
4K-1388     O-Ring Seal     1    
4N-8150     Spring     3    
6L-2280     Zinc Rod     3    
6V-5048     O-Ring Seal     1    
6V-6923     Backup Ring     1    
6v-8397     O-Ring Seal     2    
8S-9191     Bolt     6    
8T-9527     O-Ring Seal     1    
033-6033     O-Ring Seal     1    
061-9455     O-Ring Seal     1    
106-1792     Taperlock Stud     12    
107-5769     O-Ring Seal     2    
109-0077     O-Ring Seal     1    
122-3772     O-Ring Seal     1    
126-1757     Washer     9    
129-5427     Special Washer     2    
131-7123     Bushing     1    
142-5867     Crankshaft Seal     1    
144-6142     Integral Seal     1    
155-9524     Integral Seal     1    
166-9144     Gasket     1    
205-4832     O-Ring Seal     2    
228-4947     O-Ring Seal     2    
248-5513     Temperature Regulator     2    
274-7913     Air Filter Element As     1    
297-1813     Head Screw     12    
392-9208     Valve Plunger     1    C18 Engine Gasket Kit Locations