92720 Mercruiser GASKET, RISER TO MANIFOLD AND ELBOW

Care must be taken to ensure that fluids are contained during performance of inspection, maintenance, testing, adjusting, and repair of the product. Be prepared to collect the fluid with suitable containers before opening any compartment or disassembling any component containing fluids.Refer to Special Publication, PERJ1017, "Dealer Service Tool Catalog" for tools and supplies suitable to collect and contain fluids on Cat® products.Dispose of all fluids according to local regulations and mandates.
References
Reference: Operating Manual, NEHS0605, "Tool Operating Manual (9U-7400 Multitach II Group, 9U-7401 Multitach II, 9U-7402 Multitach Photo Group)" for additional information.Reference: Operating Manual, NEHS1279, "Quick Start Guide for 515-8465 Multi-Tool Plus" for additional information.Introduction
Use following procedures to check the cooling system.Required Tools
Table 1
Required Tools
Item Qty Part Number Part Name
T1 1 9S-8140 Pressurizing Pump
T1a 1 2P-2329 Adapter As
T1b 1 2P-2331 Release Valve
T1c 1 3R-3810 Hose As
T2 1 245-5829 Coolant/Battery Tester Gp
T3 1 308-7264 Multitach Tool Gp
T4 1 515-8465 Tool Gp
T5 N/A Pressure Gp(1)
T5a 1 4C-7090 Valve
T5b 1 4C-7121 Nipple
T5c 1 4C-7158 Fitting
T5d 1 4C-8852 Regulator
T5e 1 4M-5317 Reducer Bushing
T6 N/A Hose(2)
(1) Tooling (T5) consist of individual piece parts (T5a) through (T5e).
(2) The length and size of hose will vary.Testing for Freeze Protection
Illustration 1 g00439083
Tooling T2 Coolant/Battery Tester Gp
Check the coolant frequently in cold weather for the proper protection against freezing. Use Tooling (T2) to ensure adequate freeze protection. The tester gives immediate, accurate readings. The tester can be used for antifreeze/coolants that contain ethylene or propylene glycol. The tester is also used to check the condition of batteries (specific gravity). Instructions are provided with the tester.Making the Correct Antifreeze Mixtures
Adding pure antifreeze as a makeup solution for the cooling system top-off is an unacceptable practice. Adding pure antifreeze increases the concentration of antifreeze in the cooling system. Pure antifreeze increases the concentration of the dissolved solids and the undissolved chemical inhibitors in the cooling system. Add the antifreeze and water mixture in the same concentration as your cooling system. Refer to the engine Operation and Maintenance Manual.Testing the Supplemental Coolant Additive and the Glycol
Refer to the engine Operation and Maintenance Manual for further information about testing the cooling system.Testing for Air and/or Exhaust Gas in the Coolant
Air and/or exhaust gas in the coolant causes foaming and aeration. Bubbles in the cooling system reduce the heat transfer and the pump flow. Pockets of air or gas can prevent coolant from contacting parts of the engine. The pockets allow hot spots to develop.If the cooling system is not filled to the proper level, air can be trapped in the system. Filling the cooling system too quickly can also trap air in the system. Leaks from components such as aftercoolers and hoses can allow air to enter the system. The inlet of the water pump is a potential location for the entry of air.To help prevent air from entering the cooling system, fill the system slowly. The radiator cap must be removed when filling the system from the bottom. Make sure that all the hoses and pipe connections are secure.If the cylinder head is loose or cracked, exhaust gas can enter the cooling system. Exhaust gas can also enter the cooling system through internal cracks and/or defects in the cylinder head gasket.Air and/or exhaust gas in the cooling system can cause overheating.Test Preparation
Make sure that the cooling system is filled to the proper level.
Illustration 2 g00769076
Remove the plug from the radiator (if equipped). Install a Tooling (T6) into the hole for the plug.
Fill a clear container with water and place the other end of Tooling (T6) into the container.Test Pr