821310 Mercury SEAL-OIL

This engine uses high voltage to control the fuel injectors.Disconnect electronic fuel injector enable circuit connector to prevent personal injury.Do not come in contact with the fuel injector terminals while the engine is running.
Failure to follow the recommended procedure or the specified tooling that is required for the procedure could result in damage to components.To avoid component damage, follow the recommended procedure using the recommended tools.
The engine valve lash and the injector lash must be within specifications prior to adjusting the compression brake slave piston lash. Refer to Testing and Adjusting, "Engine Valve Lash - Inspect/Adjust" for the correct procedure for inspection of the engine valve lash. Refer to Testing and Adjusting, "Electronic Unit Injector - Adjust" for the proper procedure for inspection of the injector lash adjustment.Note: The slave piston lash adjustment must be performed while the engine is cold. If the engine is warm, allow the engine to cool prior to performing the following adjustments.Use the following procedure to adjust the slave piston lash on cylinders 1, 3, and 5:Put the No. 1 piston at the top center position on the compression stroke. See Testing and Adjusting, "Finding Top Center Position for No. 1 Piston" for further details.Jake Brake Compression Brake Adjustment
Illustration 1 g00596577
Typical configuration for Jake Brake engine compression brake
(1) Adjustment screw for the slave piston
(2) Slave piston
(3) Rocker arm
Prior to adjusting the lash setting for the engine compression brake, check the identification plate that is on the compression brake casting in order to determine the model that is installed on your engine. You must have this model number and the engine serial number prefix in order to determine the lash setting for your engine.
Table 1
Slave Piston Lash Setting
Jake Brake Compression Brakes
Serial Number Prefix and Model Number(1) Horsepower Rating Slave Piston Lash Setting
2WS1-UP
6NZ1-83125
9NZ1-UP
C2A1-Up (Excluding 10R-9846)
Jake Brake 340B or Jake Brake 340C 410 hp or less 0.94 0.08 mm (0.037 0.003 inch)
435 hp or more 0.84 0.08 mm (0.033 0.003 inch)
375/435 hp Multitorque rating 0.84 0.08 mm (0.033 0.003 inch)
1MM1-UP
7CZ1-03833
5DS1-UP
Jake Brake 340B or Jake Brake 340C All ratings 0.94 0.08 mm (0.037 0.003 inch)
1LW1-33333
Jake Brake 340B or Jake Brake 340C 410 hp or less 0.84 0.08 mm (0.033 0.003 inch)
435 hp or more 0.68 0.08 mm (0.027 0.003 inch)
5EK1-01820(2)
Jake Brake 340 435 hp or more 0.68 0.08 mm (0.027 0.003 inch)
4AS1-UpJake Brake 340C All ratings 0.68 0.08 mm (0.027 0.003 inch)
5EK1-UP(2)
6TS1-UP
Jake Brake 340A 410 hp or less 0.68 0.08 mm (0.027 0.003 inch)
435 hp or more 0.76 0.08 mm (0.030 0.003 inch)
1LW33334-UP
6NZ83126-UP
9NZ1-UP
7CZ03834-UP
Jake Brake 340D All ratings 0.64 0.08 mm (0.025 0.003 inch)
CJP1-UP
MDP1-UP
MEP1-UP
W1A1-UP
Jake Brake 340C All ratings 1.02 0.08 mm (0.040 0.003 inch)
MBN1-UP
C2A1-UP ( 10R-9846 only)
Jake Brake 340D All ratings 0.76 0.08 mm (0.030 0.003 inch)
BXS1-01545
Jake Brake 340C All ratings 0.89 0.08 mm (0.035 0.003 inch)
BXS01546-UP
Jake Brake 340E All ratings 0.84 0.08 mm (0.033 0.003 inch)
(1) Check the identification plate that is on the compression brake casting to determine the model that is installed on your engine.
(2) Some of the early 3406E Engines 5EK1-01820 were built with either the 340 or the 340A compression brakes.Note: The slave piston lash settings are specific to the model number of the compression brake and to the serial number prefix of the engine. Use these settings only for the compression brakes and serial number prefixes that are specified in the table.340D Compression Brakes
Loosen adjustment locknut (1) and back out the adjustment screw until the slave piston is not in contact with the exhaust valve rocker arm.
Insert the appropriate feeler gauge between the foot of the slave piston (2) and the rocker arm (3). Refer to Table 1 for the correct slave piston lash setting.
Turn the adjustment screw for the slave piston in a clockwise direction until the slave piston tightens against the feeler gauge. A slight drag should be felt on the feeler gauge.
Tighten the