813043T00 Mercury POWERHEAD ASSEMBLY

Introduction
Certain C18 Marine engines equipped with 153-9086 Hose As , 197-9441 Hose As or 193-0158 Hose As may have fuel line routing that could lead to rubbing and/or chaffing that could result in the hose leaking.Important Safety Information
Do not perform any procedure in this Special Instruction until you have read this Special Instruction and you understand this information. Use only proper tools and observe all precautions that pertain to the use of those tools. Failure to follow these procedures can result in personal injury. The following procedures should also be observed.Work safely. Most accidents that involve product operation, maintenance, and repair are caused by failure to observe basic safety rules or precautions. An accident can often be avoided by recognizing potentially hazardous situations before an accident occurs.A person must be alert to potential hazards. This person should also have the necessary training, skills, and tools in order to perform these functions properly.Safety precautions and warnings are provided in this instruction and on the product. If these hazard warnings are not heeded, bodily injury or death could occur to you or to other persons. Caterpillar cannot anticipate every possible circumstance that might involve a potential hazard.Therefore, the warnings in this publication and the warnings that are on the product are not all inclusive. Ensure that any tool, procedure, work method, or operating technique you use that is not recommended by Caterpillar is safe.Ensure that the product will not be damaged or the product will not be made unsafe by the operation, lubrication, maintenance, or repair procedures used.
Do not operate or work on this engine or generator set unless you have read and understand the instructions and warnings in the Operation and Maintenance Manuals.Failure to follow the warnings and instructions could result in injury or death. Contact any Caterpillar dealer for replacement manuals. Proper care is your responsibility.
Required Parts
The following tables given below are a partial list associated only with the change of the hose and/or tube. Additional seals may be necessary depending on the components that are removed to gain access to install the new hose assembly.
Table 1
Parts Needed for Installation of 423-8579 Hose As    
Quantity     Part Number/Description    
1     6V-8636 Connector    
1     214-7568 O-Ring Seal    
1     6V-9850 Elbow    
2     228-7089 O-Ring Seal    
1     423-8579 Hose As    
1     3G-4005 Link    
1     0S-1588 Bolt    
2     5M-2894 Hard Washer    
1     186-0357 Clip    
1     4E-7133 Boss    
1     9S-8752 Full Nut    
Table 2
Parts Needed for Installation of 419-9821 Hose As    
Quantity     Part Number/Description    
1     228-7089 O-Ring Seal    
1     419-9821 Hose As    
1     0S-1591 Bolt    
2     5M-2894 Hard Washer    
1     186-0357 Clip    
1     154-2302 Spacer    
1     1B-5355 Full Nut    
1     030-7962 Elbow    
1     030-8194 Connector    
1     238-5081 O-Ring Seal    Installation of the 423-8579 Hose As
The 153-9086 Hose As is used on all filter arrangements.
The 153-9086 Hose As is replaced by 423-8579 Hose As .
Remove the existing 153-9086 Hose As and elbow from the rear of the cylinder head.
Install the 214-7568 O-Ring Seal and 228-7089 O-Ring Seal on to the 6V-8636 Connector . Install the 228-7089 O-Ring Seal to the 6V-9850 Elbow .
Illustration 1 g03366719
(1) 183-3399 Connector As ( 6V-8636 Connector ( QTY 1), 214-7568 O-Ring Seal ( QTY 1), and 228-7089 O-Ring Seal ( QTY 1) ) (2) 423-8579 Hose As (3) 297-7976 Elbow As ( 6V-9850 Elbow ( QTY 1), and 228-7089 O-Ring Seal ( QTY 1) )
Refer to Illustration 1 for component orientation.
Illustration 2 g03366724
(4) 3G-4005 Link (5) 0S-1588 Bolt (6) 5M-2894 Hard Washer (7) 186-0357 Clip (8) 4E-7133 Boss (9) 9S-8752 Full Nut (10) 423-8579 Hose As
Connect the 423-8579 Hose As and components as shown in Illustration 2.Installation of 419-9821 Hose As
The existing 193-0158 Hose As is used on "Left Hand" service engines with simplex filter arrangements.
193-0158 Hose As is replaced by 419-9821 Hose As . The 193-0158 Ho