Yanmar 4TNE88 — Honing with the Flex-Hone

Repair & overhaul · Cylinder

For the Yanmar 4TNE88, from the Yanmar service manual.

Applies to: Yanmar 4TNE88, Yanmar TNE series engine

Before you start

Use of the Flex-Hone at a higher speed may be hazardous.
Never insert or extract the Flex-Hone with the power drill stopped.

Procedure

Apply the honing fluid to the Flex-Hone.
Insert the Flex-Hone into the cylinder while turning it.
Move it up and down for about 30 sec for a cross hatch angle of 30-40 deg.
Extract the Flex-Hone while turning it.

Tools required

Flex-Hone Amazon
Power drill Amazon
Honing fluid Amazon

Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.

Specs & values

Flex-Hone speed 300-1200 Amazon eBay rpm
Cross hatch angle 30-40 FridayParts $40.00 deg

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.

More Yanmar repair guides →