0930002350 MITSUBISHI PUMP ASSY, INJECTI Calibration Data

Introduction
This Tool Operating Manual provides the information needed to obtain and assemble the necessary components of the 4C-8180 Timing Tool Group. It also provides a procedure to set the tooling and then adjust engine timing using the 4C-8180 Timing Tool Group. The tooling can be used on 3408C and 3412C High Performance Marine Engines. These engine serial number ranges are 8RG, 3JK, and 7BL.There are two parts to the 4C-8180 Timing Tool Group. First, there are the parts used to perform the actual timing procedure. This includes the parts used to make the 4C-8181 Timing Tool Assembly. Second, there are the parts used to set the timing tool assembly indicator reading to zero. These parts include the 4C-8184 Gauge, 4C-8182 Gauge Collar, and 4C-8183 Gauge Plate.The use of this equipment will improve the fuel injection pump-to-engine timing accuracy and is intended to replace the flow timing method currently described in many Service Manuals.Do not perform any procedure outlined in this publication or order any parts until you read and understand the information contained within.
4C-8180 Timing Tool Group The 4C-8180 Timing Tool Group does not include a dial indicator, however, there is a cut-out in the foam insert to store one.Parts Required for the 4C-8180 Timing Tool Group
To help keep the tool group cost to a minimum, the 4C-8180 Timing Tool Group is not serviced as a group. Since the group contains several tools which dealers may already have on hand and the 4C-8181 Timing Tool Assembly can be made from used engine parts, order only the new parts necessary to make a complete tool group.Once all the required tools are on hand, store them in a 6V-3073 Plastic Case with an NEEG2651 Decal on the outside of the lid. A 4C-8185 Foam Block Group is also available to keep the tools in place, preventing possible damage. The top foam insert should be glued to the inside lid of the case, using 8T-9021 Adhesive or equivalent.
Parts Required For 4C-8180 Timing Tool Group
Refer to Chart A for item identification.Assemble and Set the 4C-8180 Timing Tool Group
1. Obtain a 108-2104 Plunger and Barrel Assembly. This part can be new or used. If the part is used, make sure it is in good working condition. The plunger should move freely in the barrel.
4C-8181 Timing Tool Assembly
(9) 8J-3819 Spring. (10) 1N-3257 Retainer Ring. (11) Plunger and barrel from 108-2104 Plunger and Barrel Assembly. (12) 4C-8178 Indicator Mount Bonnet. (14) 4C-8179 Bonnet Nut. (16) 2W-3429 Gear Segment (part of 108-2104). (17) 8N-0669 Bolt (part of 108-2104). (18) 4P-8704 Spring (part of 108-2104). (19) 9Y-2088 Washer.2. Make a 4C-8181 Timing Tool Assembly out of the 108-2104 Plunger and Barrel Assembly. The 4C-8181 Timing Tool Assembly is not a serviceable part. a. Remove and discard 8N-0669 Bolt (17), 2W-3429 Gear Segment (16), and 4P-8704 Spring (18) from the 108-2104 Plunger and Barrel Assembly.b. Assemble 8J-3819 Spring (9) and 9Y-2088 Washer (19) onto plunger. The 9Y-2088 Washer is part of the 108-2104 Plunger and Barrel Assembly.c. Install