Yanmar 4TNE88 — Checking and adjusting the fuel injection timing (indirect injection system)
Adjustments · Fuel injection pump
For the Yanmar 4TNE88, from the Yanmar service manual.
Applies to: Yanmar 4TNE88, Yanmar TNE series engine
Before you start
- Increase shim thickness to delay timing; decrease to advance timing.
Procedure
- Turn the engine in the specified direction using the crankshaft pulley.
- Check injection timing at the delivery valve of cylinder No.1 when oil level rises.
- Identify the timing mark on the flywheel through the access hole of the flywheel housing.
- If timing differs from specified, remove the fuel injection pump and adjust by increasing or decreasing the adjusting shim thickness.
Specs & values
- Fuel injection timing per model (FID b.T.D.C.)
Full service-parts list: Yanmar 4TNE88 →
Source: Yanmar service manual. Steps and values are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.