Yanmar — 3.10.7 Adjustment of Fuel Injection

A Yanmar service procedure — check it applies to your exact model before use.

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Procedure

1. Adjust the pre-lift (1) Attach the special tool to the dial indicator and adjust the protrusion shown in the figure to 2.0 mm or less. (2) Adjust the dial indicator reading on the special tool or square block to 0 mm, using the special tool. (3) Locate the nozzle assembly, distance piece, straight pins and No.1 pressure pin on the special tool shown in the figure. by about 1/3 of overall length {Testing sliding movement of need le tip) {Attaching the special tool) mn q Special
2. Engine Overhaul (4) Fit the holes in the special tool to the straight pins (Measuring length 2 2) and measure length ¢ 2. 4b (5) Attach the special tool to the dial indicator and [ (Attaching the special too!) adjust the protrusion shown in the figure to 7.0 Special tool mm or less.
3. Engine Overhaul (8) Fit the holes in the special tool to the straight pins and measure length 2 1. (9) 1 (standard): 4.79mm
4. Engine Overhaul
5. Adjust the Needle-lift (1) Attach the special tool to the dial indicator and adjust the protrusion length shown in the figure to

Source: manual:Yanmar-6LP-DTE-Service.pdf. Figures and steps are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.