Kubota WG972-GL-E3F — Spark Test
Testing & diagnosis · Ignition system
For the Kubota WG972-GL-E3F, from the Kubota service manual.
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Before you start
- This test is hazardous of electric shocks. Never use hand or screwdriver to press the plug to ground it.
- Keep inflammable away from the engine.
Procedure
- Disconnect all injector connector.
- Remove the spark plug, put it inside the ignition coil firmly, and ground the threaded section to the engine body.
- Rotate the starter with the key switch and check that the plug sparks.
- If test is OK, tighten the spark plug with a plug wrench.
Tools required
- Plug wrench Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Spark plug: NGK BKR6E
- Spark plug tightening torque: 24.5 to 29.4 N·m
Source: Kubota 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.